{
  "conflicts": [],
  "coverage": {
    "cells": {
      "SNase-apo": {
        "af_prediction": 0,
        "force_spectroscopy": 0,
        "nmr_shifts": 0,
        "nmr_structure": 9,
        "xray": 87
      },
      "SNase-pdTp": {
        "af_prediction": 0,
        "force_spectroscopy": 0,
        "nmr_shifts": 0,
        "nmr_structure": 2,
        "xray": 197
      },
      "SNase-unfolded": {
        "af_prediction": 0,
        "force_spectroscopy": 0,
        "nmr_shifts": 6,
        "nmr_structure": 0,
        "xray": 0
      }
    },
    "data_levels": {
      "SNase-apo": {
        "nmr_structure": "processed",
        "xray": "processed"
      },
      "SNase-pdTp": {
        "nmr_structure": "processed",
        "xray": "processed"
      },
      "SNase-unfolded": {
        "nmr_shifts": "processed"
      }
    },
    "single_method_states": [
      "SNase-unfolded"
    ],
    "states": [
      "SNase-apo",
      "SNase-pdTp",
      "SNase-unfolded"
    ],
    "techniques": [
      "xray",
      "nmr_structure",
      "nmr_shifts",
      "force_spectroscopy",
      "af_prediction"
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    "unmapped_evidence": 34
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  "curation": {
    "as_of": "2026-10-19",
    "curator": "draft (unreviewed)",
    "file": "P00644.yaml",
    "status": "draft"
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      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1A2T",
      "evidence_id": "EV-PDB-1A2T-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.96
      },
      "provenance": {
        "deposit_id": "1A2T",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1A2T"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, B-MERCAPTOETHANOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1A2U",
      "evidence_id": "EV-PDB-1A2U-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "1A2U",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1A2U"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, V23C VARIANT, COMPLEX WITH 1-N-BUTANE THIOL AND 3',5'-THYMIDINE DIPHOSPHATE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1A3U",
      "evidence_id": "EV-PDB-1A3U-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.05
      },
      "provenance": {
        "deposit_id": "1A3U",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1A3U"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, CYCLOHEXANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1A3V",
      "evidence_id": "EV-PDB-1A3V-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.2
      },
      "provenance": {
        "deposit_id": "1A3V",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1A3V"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, CYCLOPENTANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1ENA",
      "evidence_id": "EV-PDB-1ENA-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.15
      },
      "provenance": {
        "deposit_id": "1ENA",
        "doi": "10.1021/bi00192a004",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1ENA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND THE TERNARY COMPLEX OF THE ASP 21->GLU MUTANT OF STAPHYLOCOCCAL NUCLEASE. IMPLICATIONS FOR CATALYSIS AND LIGAND BINDING"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY0",
      "evidence_id": "EV-PDB-1EY0-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "Wild-type, ligand-free structure; representative of the apo state.",
          "rule": "curator_assignment",
          "state_id": "SNase-apo",
          "who": "curator:draft (unreviewed)"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "1EY0",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY0"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF WILD-TYPE S. NUCLEASE AT 1.6 A RESOLUTION"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY4",
      "evidence_id": "EV-PDB-1EY4-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "1EY4",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY4"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING MUTANT S59A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY5",
      "evidence_id": "EV-PDB-1EY5-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "1EY5",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING MUTANT T33V"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY6",
      "evidence_id": "EV-PDB-1EY6-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.75
      },
      "provenance": {
        "deposit_id": "1EY6",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY6"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING MUTANT T41I"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY7",
      "evidence_id": "EV-PDB-1EY7-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.88
      },
      "provenance": {
        "deposit_id": "1EY7",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY7"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING MUTANT S128A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY8",
      "evidence_id": "EV-PDB-1EY8-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.75
      },
      "provenance": {
        "deposit_id": "1EY8",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING TRIPLE MUTANT P117G/H124L/S128A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EY9",
      "evidence_id": "EV-PDB-1EY9-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.72
      },
      "provenance": {
        "deposit_id": "1EY9",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EY9"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING QUADRUPLE MUTANT T41I/P117G/H124L/S128A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EYA",
      "evidence_id": "EV-PDB-1EYA-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
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        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EYA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EYC",
      "evidence_id": "EV-PDB-1EYC-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EYC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING QUINTUPLE MUTANT T41I/S59A/P117G/H124L/S128A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EYD",
      "evidence_id": "EV-PDB-1EYD-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "1EYD",
        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EYD"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF WILD-TYPE S. NUCLEASE AT 1.7 A RESOLUTION"
    },
    {
      "conditions": {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EZ6",
      "evidence_id": "EV-PDB-1EZ6-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
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        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EZ6"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING SEXTUPLE MUTANT T33V/T41I/S59A/P117G/H124L/S128A"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 23.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1EZ8",
      "evidence_id": "EV-PDB-1EZ8-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
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        "doi": "10.1006/jmbi.2000.4140",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1EZ8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRUCTURE OF S. NUCLEASE STABILIZING MUTANT T33V"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.5,
        "salt_mM": null,
        "temperature_c": 44.85
      },
      "construct": {
        "description": "staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1JOQ",
      "evidence_id": "EV-PDB-1JOQ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
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        "doi": "10.1023/A:1018350004729",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1JOQ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Ensemble structures for Staphylococcal nuclease-H124L in ternary complex with Ca2+ and thymidine-3',5'-bisphosphate"
    },
    {
      "conditions": {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1KAA",
      "evidence_id": "EV-PDB-1KAA-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1KAA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRESS AND STRAIN IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1KAB",
      "evidence_id": "EV-PDB-1KAB-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "1KAB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1KAB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STRESS AND STRAIN IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1KDA",
      "evidence_id": "EV-PDB-1KDA-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1KDA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STABILIZATION OF A STRAINED PROTEIN LOOP CONFORMATION THROUGH PROTEIN ENGINEERING"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1KDB",
      "evidence_id": "EV-PDB-1KDB-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "1KDB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1KDB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STABILIZATION OF A STRAINED PROTEIN LOOP CONFORMATION THROUGH PROTEIN ENGINEERING"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1NUC",
      "evidence_id": "EV-PDB-1NUC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "1NUC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1NUC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 4.9,
        "salt_mM": null,
        "temperature_c": 31.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1RKN",
      "evidence_id": "EV-PDB-1RKN-1",
      "mappings": [],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "1RKN",
        "doi": "10.1529/biophysj.106.092155",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1RKN"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of 1-110 fragment of Staphylococcal Nuclease with G88W mutation"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "THERMONUCLEASE PRECURSOR (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SNC",
      "evidence_id": "EV-PDB-1SNC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "Ca2+ and pdTp ternary complex; representative of the inhibitor-bound state.",
          "rule": "curator_assignment",
          "state_id": "SNase-pdTp",
          "who": "curator:draft (unreviewed)"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "1SNC",
        "doi": "10.1002/prot.340050302",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SNC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "THE CRYSTAL STRUCTURE OF THE TERNARY COMPLEX OF STAPHYLOCOCCAL NUCLEASE, CA2+, AND THE INHIBITOR PD*TP, REFINED AT 1.65 ANGSTROMS"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE DIMER (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SND",
      "evidence_id": "EV-PDB-1SND-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.84
      },
      "provenance": {
        "deposit_id": "1SND",
        "doi": "10.1038/nsb0995-746",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SND"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE DIMER CONTAINING A DELETION OF RESIDUES 114-119 COMPLEXED WITH CALCIUM CHLORIDE AND THE COMPETITIVE INHIBITOR DEOXYTHYMIDINE-3',5'-DIPHOSPHATE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "THERMONUCLEASE PRECURSOR (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SNM",
      "evidence_id": "EV-PDB-1SNM-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.74
      },
      "provenance": {
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        "doi": "10.1021/bi00481a016",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SNM"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ACTIVE SITE MUTANT GLU-43 (RIGHT ARROW) ASP IN STAPHYLOCOCCAL NUCLEASE DISPLAYS NONLOCAL STRUCTURAL CHANGES"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 3.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SNO",
      "evidence_id": "EV-PDB-1SNO-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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        "unit": "Å",
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SNO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "PROTEIN STABILITY IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 3.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SNP",
      "evidence_id": "EV-PDB-1SNP-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
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        "unit": "Å",
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        "deposit_id": "1SNP",
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SNP"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "PROTEIN STABILITY IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
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        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 3.85
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SNQ",
      "evidence_id": "EV-PDB-1SNQ-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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        "type": "resolution",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SNQ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "PROTEIN STABILITY IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STA",
      "evidence_id": "EV-PDB-1STA-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "1STA",
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ACCOMMODATION OF INSERTION MUTATIONS ON THE SURFACE AND IN THE INTERIOR OF STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CO",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STG",
      "evidence_id": "EV-PDB-1STG-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "1STG",
        "doi": "10.1021/bi00013a021",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "TWO DISTINCTLY DIFFERENT METAL BINDING MODES ARE SEEN IN X-RAY CRYSTAL STRUCTURES OF STAPHYLOCOCCAL NUCLEASE-COBALT(II)-NUCLEOTIDE COMPLEXES"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CO",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STH",
      "evidence_id": "EV-PDB-1STH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
        "deposit_id": "1STH",
        "doi": "10.1021/bi00013a021",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "TWO DISTINCTLY DIFFERENT METAL BINDING MODES ARE SEEN IN X-RAY CRYSTAL STRUCTURES OF STAPHYLOCOCCAL NUCLEASE-COBALT(II)-NUCLEOTIDE COMPLEXES"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STN",
      "evidence_id": "EV-PDB-1STN-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "1STN",
        "doi": "10.1002/prot.340100203",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STN"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "THE CRYSTAL STRUCTURE OF STAPHYLOCOCCAL NUCLEASE REFINED AT 1.7 ANGSTROMS RESOLUTION"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STY",
      "evidence_id": "EV-PDB-1STY-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.67
      },
      "provenance": {
        "deposit_id": "1STY",
        "doi": "10.1073/pnas.90.8.3275",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STY"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "THE ALPHA ANEURISM: A STRUCTURAL MOTIF REVEALED IN AN INSERTION MUTANT OF STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1STB",
      "evidence_id": "EV-PDB-1STB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "1STB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1STB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ACCOMMODATION OF INSERTION MUTATIONS ON THE SURFACE AND IN THE INTERIOR OF STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains S)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1NSN",
      "evidence_id": "EV-PDB-1NSN-3",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.8
      },
      "provenance": {
        "deposit_id": "1NSN",
        "doi": "10.1006/jmbi.1995.0573",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1NSN"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "THE CRYSTAL STRUCTURE OF ANTIBODY N10-STAPHYLOCOCCAL NUCLEASE COMPLEX AT 2.9 ANGSTROMS RESOLUTION"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1KDC",
      "evidence_id": "EV-PDB-1KDC-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "1KDC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1KDC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STABILIZATION OF A STRAINED PROTEIN LOOP CONFORMATION THROUGH PROTEIN ENGINEERING"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.5,
        "salt_mM": null,
        "temperature_c": 44.85
      },
      "construct": {
        "description": "staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1JOR",
      "evidence_id": "EV-PDB-1JOR-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "1JOR",
        "doi": "10.1023/A:1018350004729",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1JOR"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Ensemble structures for unligated Staphylococcal nuclease-H124L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.5,
        "salt_mM": null,
        "temperature_c": 44.85
      },
      "construct": {
        "description": "staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1JOO",
      "evidence_id": "EV-PDB-1JOO-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
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        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "1JOO",
        "doi": "10.1023/A:1018350004729",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1JOO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Averaged structure for unligated Staphylococcal nuclease-H124L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.5,
        "salt_mM": null,
        "temperature_c": 44.85
      },
      "construct": {
        "description": "staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1JOK",
      "evidence_id": "EV-PDB-1JOK-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
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          "confidence": "low",
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      },
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      "source_kind": "deposit",
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        "temperature_c": 4.85
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      ],
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        "url": "https://www.rcsb.org/structure/1F2Z"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "SIMPLIFICATION OF A PROTEIN LOOP IN STAPHYLOCOCCAL NUCLEASE"
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 4.85
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "SIMPLIFICATION OF A PROTEIN LOOP IN STAPHYLOCOCCAL NUCLEASE"
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
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        "temperature_c": 4.85
      },
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      "source_kind": "deposit",
      "technique": "xray",
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        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 4.85
      },
      "construct": {
        "description": "THERMONUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/1EQV",
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          "confidence": "low",
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          "who": "rule:snase-apo-structures"
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "SIMPLIFICATION OF A PROTEIN LOOP IN STAPHYLOCOCCAL NUCLEASE"
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        "buffer": null,
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
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      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/1ENC",
      "evidence_id": "EV-PDB-1ENC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1ENC"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND THE TERNARY COMPLEX OF THE ASP 21->GLU MUTANT OF STAPHYLOCOCCAL NUCLEASE. IMPLICATIONS FOR CATALYSIS AND LIGAND BINDING"
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1AEX",
      "evidence_id": "EV-PDB-1AEX-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
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          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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        "unit": "Å",
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      },
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        "doi": null,
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1AEX"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, METHANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1A3T",
      "evidence_id": "EV-PDB-1A3T-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1A3T"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, V23C VARIANT, COMPLEX WITH 2-FLUOROETHANE THIOL AND 3',5'-THYMIDINE DIPHOSPHATE"
    },
    {
      "conditions": {
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        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -178.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1TQO",
      "evidence_id": "EV-PDB-1TQO-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "doi": "10.1016/j.jmb.2004.05.066",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1TQO"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Cryogenic Crystal Structure of Staphylococcal Nuclease Variant truncated Delta+PHS I92E"
    },
    {
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1TR5",
      "evidence_id": "EV-PDB-1TR5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "url": "https://www.rcsb.org/structure/1TR5"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Room temperature structure of Staphylococcal nuclease variant truncated Delta+PHS I92E"
    },
    {
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        "environment": "in_vitro",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
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          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2ENB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND THE TERNARY COMPLEX OF THE ASP 21->GLU MUTANT OF STAPHYLOCOCCAL NUCLEASE. IMPLICATIONS FOR CATALYSIS AND LIGAND BINDING"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.5,
        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
        "description": "Staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2EXZ",
      "evidence_id": "EV-PDB-2EXZ-1",
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        {
          "confidence": "low",
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          "who": "rule:snase-apo-structures"
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "url": "https://www.rcsb.org/structure/2EXZ"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease mutant T22C"
    },
    {
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        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.5,
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        "temperature_c": 19.85
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      },
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      "technique": "xray",
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      },
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      },
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      "technique": "xray",
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      },
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      },
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      },
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        "temperature_c": 19.85
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      },
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      "technique": "xray",
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        "temperature_c": 19.85
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      },
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      "technique": "xray",
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      "source_kind": "deposit",
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        "environment": "in_vitro",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
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      },
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      "data_link": "https://www.rcsb.org/structure/2F0S",
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          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "who": "rule:snase-apo-structures"
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      ],
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      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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      },
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        {
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          "state_id": "SNase-apo",
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      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2F0U",
      "evidence_id": "EV-PDB-2F0U-1",
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        {
          "confidence": "low",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
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        "url": "https://www.rcsb.org/structure/2F0U"
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      "source_kind": "deposit",
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    },
    {
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2F0V",
      "evidence_id": "EV-PDB-2F0V-1",
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        {
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          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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      },
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      "source_kind": "deposit",
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    },
    {
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        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
        "description": "Staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2F0W",
      "evidence_id": "EV-PDB-2F0W-1",
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        {
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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      },
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        "url": "https://www.rcsb.org/structure/2F0W"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease mutant V23I/L25I/V66L/I72L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 4.9,
        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2F3V",
      "evidence_id": "EV-PDB-2F3V-1",
      "mappings": [],
      "molecule_id": "P00644",
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        "type": "structure",
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        "unit": null,
        "value": null
      },
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        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2F3V"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of 1-110 fragment of staphylococcal nuclease with V66W mutation"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2F3W",
      "evidence_id": "EV-PDB-2F3W-1",
      "mappings": [],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2F3W"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "solution structure of 1-110 fragment of staphylococcal nuclease in 2M TMAO"
    },
    {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.0,
        "salt_mM": null,
        "temperature_c": 26.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2KHS",
      "evidence_id": "EV-PDB-2KHS-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "2KHS",
        "doi": "10.1021/bi901099s",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2KHS"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of SNase121:SNase(111-143) complex"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2NUC",
      "evidence_id": "EV-PDB-2NUC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "2NUC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2NUC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHLOCOCCAL NUCLEASE, ETHANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -178.15
      },
      "construct": {
        "description": "Staphylococcal thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2OEO",
      "evidence_id": "EV-PDB-2OEO-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "2OEO",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2OEO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Cryogenic crystal structure of Staphylococcal Nuclease variant truncated Delta+PHS I92D"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "NA"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains W,X,Y,Z)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2GSI",
      "evidence_id": "EV-PDB-2GSI-3",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.81
      },
      "provenance": {
        "deposit_id": "2GSI",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2GSI"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of a Murine Fab in Complex with an 11 Residue Peptide Derived from Staphylococcal Nuclease"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.0,
        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "13-mer peptide from Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2FXZ",
      "evidence_id": "EV-PDB-2FXZ-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "2FXZ",
        "doi": "10.1002/bip.20558",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2FXZ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of 97-109 segment of staphylococcal nuclease"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.0,
        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "18-mer peptide from Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2FXY",
      "evidence_id": "EV-PDB-2FXY-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "2FXY",
        "doi": "10.1002/bip.20558",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2FXY"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of 55-72 segment of staphylococcal nuclease"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.5,
        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
        "description": "Staphylococcal nuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2F0Q",
      "evidence_id": "EV-PDB-2F0Q-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.95
      },
      "provenance": {
        "deposit_id": "2F0Q",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2F0Q"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease mutant V66L/I92L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.5,
        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "source_kind": "deposit",
      "technique": "xray",
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 19.85
      },
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2F0H",
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        {
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          "state_id": "SNase-apo",
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        }
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        "url": "https://www.rcsb.org/structure/2F0H"
      },
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      "source_kind": "deposit",
      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2F0F",
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          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
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        "source": "RCSB PDB",
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      "source_kind": "deposit",
      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2EYO",
      "evidence_id": "EV-PDB-2EYO-1",
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        {
          "confidence": "low",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
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        "url": "https://www.rcsb.org/structure/2EYO"
      },
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      "source_kind": "deposit",
      "technique": "xray",
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    },
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2EYL",
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      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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        "unit": "Å",
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      },
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        "url": "https://www.rcsb.org/structure/2EYL"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease mutant T82S"
    },
    {
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        "environment": "in_vitro",
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        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2EYH",
      "evidence_id": "EV-PDB-2EYH-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
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      ],
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "url": "https://www.rcsb.org/structure/2EYH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "environment": "in_vitro",
        "ions": [],
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/2EYF",
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          "confidence": "low",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
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        "unit": "Å",
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2EYF"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease mutant T44V"
    },
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        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.5,
        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
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        "labels": []
      },
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      "data_link": "https://www.rcsb.org/structure/2EY5",
      "evidence_id": "EV-PDB-2EY5-1",
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        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2EY5"
      },
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      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": 24.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1U9R",
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      "mappings": [
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          "confidence": "low",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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        "unit": "Å",
        "value": 2.1
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        "doi": "10.1529/biophysj.104.048454",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1U9R"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal Nuclease mutant V66E/P117G/H124L/S128A at Room Temperature"
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    {
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          "DMS",
          "GOL",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.1,
        "salt_mM": null,
        "temperature_c": -178.15
      },
      "construct": {
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        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1TT2",
      "evidence_id": "EV-PDB-1TT2-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYG",
      "evidence_id": "EV-PDB-1SYG-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
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        "unit": "Å",
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      },
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        "deposit_id": "1SYG",
        "doi": "10.1021/bi00183a004",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ENGINEERING ALTERNATIVE BETA-TURN TYPES IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYF",
      "evidence_id": "EV-PDB-1SYF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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        "doi": "10.1021/bi00183a004",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ENGINEERING ALTERNATIVE BETA-TURN TYPES IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYE",
      "evidence_id": "EV-PDB-1SYE-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
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      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "doi": "10.1021/bi00183a004",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYE"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ENGINEERING ALTERNATIVE BETA-TURN TYPES IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYD",
      "evidence_id": "EV-PDB-1SYD-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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        "value": 1.7
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYD"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    {
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
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      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYC",
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        {
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "ENGINEERING ALTERNATIVE BETA-TURN TYPES IN STAPHYLOCOCCAL NUCLEASE"
    },
    {
      "conditions": {
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        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
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      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/1SYB",
      "evidence_id": "EV-PDB-1SYB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "1SYB",
        "doi": "10.1038/339073a0",
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/1SYB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "TRANSFER OF A BETA-TURN STRUCTURE TO A NEW PROTEIN CONTEXT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "DMS",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -175.15
      },
      "construct": {
        "description": "Staphylococcal thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2OF1",
      "evidence_id": "EV-PDB-2OF1-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.92
      },
      "provenance": {
        "deposit_id": "2OF1",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2OF1"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Cryogenic crystal structure of the Staphylococcal Nuclease variant truncated Delta+PHS I92W"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 5.0,
        "salt_mM": null,
        "temperature_c": 26.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2PQE",
      "evidence_id": "EV-PDB-2PQE-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "structure",
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        "unit": null,
        "value": null
      },
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        "doi": "10.1021/bi7009794",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2PQE"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of proline-free mutant of staphylococcal nuclease"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2QDB",
      "evidence_id": "EV-PDB-2QDB-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.2
      },
      "provenance": {
        "deposit_id": "2QDB",
        "doi": "10.1016/j.jmb.2008.04.021",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2QDB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of staphylococcal nuclease variant E75Q/D21N/T33V/T41I/S59A/P117G/S128A at 100 K"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
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        "ions": [],
        "ligands": [
          "CA",
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2RBM",
      "evidence_id": "EV-PDB-2RBM-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "2RBM",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2RBM"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I72K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2RDF",
      "evidence_id": "EV-PDB-2RDF-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.01
      },
      "provenance": {
        "deposit_id": "2RDF",
        "doi": "10.1016/j.jmb.2008.04.021",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2RDF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of staphyloccocal nuclease VIAGAN/E75A variant at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 10.5,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2RKS",
      "evidence_id": "EV-PDB-2RKS-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.01
      },
      "provenance": {
        "deposit_id": "2RKS",
        "doi": "10.1110/ps.073397708",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2RKS"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant PHS L38K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2SNM",
      "evidence_id": "EV-PDB-2SNM-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.97
      },
      "provenance": {
        "deposit_id": "2SNM",
        "doi": "10.1016/0022-2836(91)80195-Z",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2SNM"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "IN A STAPHYLOCOCCAL NUCLEASE MUTANT THE SIDE-CHAIN of A LYSINE REPLACING VALINE 66 IS FULLY BURIED IN THE HYDROPHOBIC CORE"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "THERMONUCLEASE PRECURSOR (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2SNS",
      "evidence_id": "EV-PDB-2SNS-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.5
      },
      "provenance": {
        "deposit_id": "2SNS",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2SNS"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE. PROPOSED MECHANISM OF ACTION BASED ON STRUCTURE OF ENZYME-THYMIDINE 3(PRIME),5(PRIME)-BIPHOSPHATE-CALCIUM ION COMPLEX AT 1.5-ANGSTROMS RESOLUTION"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": null,
        "salt_mM": null,
        "temperature_c": null
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/2SOB",
      "evidence_id": "EV-PDB-2SOB-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "2SOB",
        "doi": "10.1006/jmbi.1995.0365",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/2SOB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "SN-OB, OB-FOLD SUB-DOMAIN OF STAPHYLOCOCCAL NUCLEASE, NMR, 10 STRUCTURES"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3BDC",
      "evidence_id": "EV-PDB-3BDC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "3BDC",
        "doi": "10.1002/prot.22470",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3BDC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3D4D",
      "evidence_id": "EV-PDB-3D4D-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.1
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3D4D"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS Y91E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3E5S",
      "evidence_id": "EV-PDB-3E5S-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 2.0
      },
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3E5S"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L103K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "MPD",
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3EJI",
      "evidence_id": "EV-PDB-3EJI-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 1.9
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3EJI"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3ERO",
      "evidence_id": "EV-PDB-3ERO-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
        "deposit_id": "3ERO",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3ERO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I72E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3ERQ",
      "evidence_id": "EV-PDB-3ERQ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.1
      },
      "provenance": {
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3ERQ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant L25K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3EVQ",
      "evidence_id": "EV-PDB-3EVQ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "3EVQ",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3EVQ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L25E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "GOL",
          "MPD",
          "MRD",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B,C,D)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3HEJ",
      "evidence_id": "EV-PDB-3HEJ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "3HEJ",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3HEJ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62R at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Nuclease A (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3ITP",
      "evidence_id": "EV-PDB-3ITP-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.75
      },
      "provenance": {
        "deposit_id": "3ITP",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3ITP"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS F34K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3MEH",
      "evidence_id": "EV-PDB-3MEH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.5
      },
      "provenance": {
        "deposit_id": "3MEH",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3MEH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3MHB",
      "evidence_id": "EV-PDB-3MHB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.55
      },
      "provenance": {
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        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3MHB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L38A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3MXP",
      "evidence_id": "EV-PDB-3MXP-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.61
      },
      "provenance": {
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        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3MXP"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3MZ5",
      "evidence_id": "EV-PDB-3MZ5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.58
      },
      "provenance": {
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        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3MZ5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L103A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Nuclease A (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NHH",
      "evidence_id": "EV-PDB-3NHH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "3NHH",
        "doi": "10.1073/pnas.1402900111",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NHH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant V23E-L36K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Nuclease A (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NK9",
      "evidence_id": "EV-PDB-3NK9-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "3NK9",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NK9"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V74A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NP8",
      "evidence_id": "EV-PDB-3NP8-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
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        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NP8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NQT",
      "evidence_id": "EV-PDB-3NQT-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "3NQT",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NQT"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NUC",
      "evidence_id": "EV-PDB-3NUC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "3NUC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NUC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHLOCOCCAL NUCLEASE, 1-N-PROPANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3NXW",
      "evidence_id": "EV-PDB-3NXW-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "3NXW",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3NXW"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L125A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3OSO",
      "evidence_id": "EV-PDB-3OSO-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "3OSO",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3OSO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L25A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3P1H",
      "evidence_id": "EV-PDB-3P1H-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.79
      },
      "provenance": {
        "deposit_id": "3P1H",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3P1H"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23K/I92A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3PMF",
      "evidence_id": "EV-PDB-3PMF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "3PMF",
        "doi": "10.1073/pnas.1200915109",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3PMF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3QB3",
      "evidence_id": "EV-PDB-3QB3-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.63
      },
      "provenance": {
        "deposit_id": "3QB3",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3QB3"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92KL25A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SHL",
      "evidence_id": "EV-PDB-3SHL-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.48
      },
      "provenance": {
        "deposit_id": "3SHL",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SHL"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V74KL25A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SK4",
      "evidence_id": "EV-PDB-3SK4-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
        "deposit_id": "3SK4",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SK4"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS D21N/V23E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SK5",
      "evidence_id": "EV-PDB-3SK5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "3SK5",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SK5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V39D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "MRD",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SK6",
      "evidence_id": "EV-PDB-3SK6-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "3SK6",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SK6"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+NVIAGLA V23K/L36E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "MPD",
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SK8",
      "evidence_id": "EV-PDB-3SK8-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "3SK8",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SK8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS M98G apo protein at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SR1",
      "evidence_id": "EV-PDB-3SR1-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.45
      },
      "provenance": {
        "deposit_id": "3SR1",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SR1"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS A69G bound to Ca2+ and thymidine-5',3'-diphosphate at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3S9W",
      "evidence_id": "EV-PDB-3S9W-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "3S9W",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3S9W"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3RUZ",
      "evidence_id": "EV-PDB-3RUZ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "url": "https://www.rcsb.org/structure/3RUZ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.5,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
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      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3P75",
      "evidence_id": "EV-PDB-3P75-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3P75"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V104D at cryogenic temperature"
    },
    {
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        "environment": "in_vitro",
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          "CA",
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3OWF",
      "evidence_id": "EV-PDB-3OWF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3OWF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66R at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3LX0",
      "evidence_id": "EV-PDB-3LX0-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 1.5
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3LX0"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS D21N at cryogenic temperature"
    },
    {
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        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3HZX",
      "evidence_id": "EV-PDB-3HZX-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "3HZX",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3HZX"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal nuclease variant D+PHS/V66K at pH 9 determined at 100 K"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3H6M",
      "evidence_id": "EV-PDB-3H6M-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3H6M"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V104E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "MPD",
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3DMU",
      "evidence_id": "EV-PDB-3DMU-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3DMU"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant PHS T62K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3DHQ",
      "evidence_id": "EV-PDB-3DHQ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.15
      },
      "provenance": {
        "deposit_id": "3DHQ",
        "doi": "10.1073/pnas.1104808108",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3DHQ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS A90R at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3D6C",
      "evidence_id": "EV-PDB-3D6C-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "3D6C",
        "doi": "10.1016/j.jmb.2009.03.039",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3D6C"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant PHS L38E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3C1F",
      "evidence_id": "EV-PDB-3C1F-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "3C1F",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3C1F"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V104K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3C1E",
      "evidence_id": "EV-PDB-3C1E-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3C1E"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L125K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3SXH",
      "evidence_id": "EV-PDB-3SXH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.4
      },
      "provenance": {
        "deposit_id": "3SXH",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3SXH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92AL103A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "MRD",
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3T13",
      "evidence_id": "EV-PDB-3T13-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
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        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "3T13",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3T13"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS A69G at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3T16",
      "evidence_id": "EV-PDB-3T16-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
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        "unit": "Å",
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      },
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      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
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          "MRD",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/3TME",
      "evidence_id": "EV-PDB-3TME-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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        "url": "https://www.rcsb.org/structure/3TME"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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          "MPD",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "evidence_id": "EV-PDB-3TP5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "url": "https://www.rcsb.org/structure/3TP5"
      },
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      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "ions": [],
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3TP6",
      "evidence_id": "EV-PDB-3TP6-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3TP6"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36E/L103K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/3TP7",
      "evidence_id": "EV-PDB-3TP7-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
        "value": 1.9
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3TP7"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V99E at cryogenic temperature"
    },
    {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3U9O",
      "evidence_id": "EV-PDB-3U9O-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3U9O"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3V2T",
      "evidence_id": "EV-PDB-3V2T-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
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        "unit": "Å",
        "value": 1.8
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3V2T"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/V66A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3VA5",
      "evidence_id": "EV-PDB-3VA5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3VA5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/V23A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4DFA",
      "evidence_id": "EV-PDB-4DFA-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4DFA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/L36A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4DGZ",
      "evidence_id": "EV-PDB-4DGZ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4DGZ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/L125A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4DU9",
      "evidence_id": "EV-PDB-4DU9-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4DU9"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/V74A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "MPD",
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4E6I",
      "evidence_id": "EV-PDB-4E6I-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4E6I"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant NVIAGA V99G at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4EQN",
      "evidence_id": "EV-PDB-4EQN-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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      },
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4EQN"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23E/I72K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4EQO",
      "evidence_id": "EV-PDB-4EQO-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
      "provenance": {
        "deposit_id": "4EQO",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4EQO"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V99D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "PO4"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4EVO",
      "evidence_id": "EV-PDB-4EVO-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
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      ],
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      },
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        {
          "confidence": "high",
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          "CA",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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      },
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        {
          "confidence": "high",
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      "source_kind": "deposit",
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          "CA",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -173.15
      },
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      },
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      "evidence_id": "EV-PDB-4HMJ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -173.15
      },
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      },
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      "evidence_id": "EV-PDB-4HTH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
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        "url": "https://www.rcsb.org/structure/4HTH"
      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": -173.15
      },
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        "labels": []
      },
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        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
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        "url": "https://www.rcsb.org/structure/4IAL"
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      "source_kind": "deposit",
      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 24.85
      },
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      },
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      "evidence_id": "EV-PDB-4ID6-1",
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        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
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      "source_kind": "deposit",
      "technique": "xray",
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          "PO4",
          "THP"
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        "salt_mM": null,
        "temperature_c": -173.15
      },
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        "labels": []
      },
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        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
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      },
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        {
          "confidence": "high",
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          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
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      },
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          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
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      "source_kind": "deposit",
      "technique": "xray",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
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        "temperature_c": -173.15
      },
      "construct": {
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      },
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          "rule": "snase-pdtp-bound",
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      "source_kind": "deposit",
      "technique": "xray",
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        "environment": "in_vitro",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 24.85
      },
      "construct": {
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        "labels": []
      },
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      "evidence_id": "EV-PDB-4K14-1",
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        {
          "confidence": "low",
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal nuclease mutant V66I/V99L"
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    {
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        "environment": "in_vitro",
        "ions": [],
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
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        "labels": []
      },
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        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
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        "url": "https://www.rcsb.org/structure/4K2K"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L25A/L36A/I92A at cryogenic temperature"
    },
    {
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/4K2L",
      "evidence_id": "EV-PDB-4K2L-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
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          "who": "rule:snase-pdtp-bound"
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4K2L"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92Q at cryogenic temperature"
    },
    {
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        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
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        "labels": []
      },
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      "evidence_id": "EV-PDB-4K5V-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
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        ],
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      },
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          "justification": "pdTp (ligand THP) bound in the active site.",
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        ],
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      },
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          "confidence": "high",
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      "technique": "xray",
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        "temperature_c": -173.15
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
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      },
      "data_format": "mmCIF + structure factors",
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      "evidence_id": "EV-PDB-4KJO-1",
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          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36A/V66T/V99T at cryogenic temperature"
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          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
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        "labels": []
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS R105Q at cryogenic temperatures"
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    {
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        "environment": "in_vitro",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
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      },
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      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS R126Q at cryogenic temperature"
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        "environment": "in_vitro",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
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        "temperature_c": 19.85
      },
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      },
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      "data_link": "https://www.rcsb.org/structure/4K8J",
      "evidence_id": "EV-PDB-4K8J-1",
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        "url": "https://www.rcsb.org/structure/4K8J"
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      "source_kind": "deposit",
      "technique": "xray",
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "temperature_c": 19.85
      },
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      },
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      "evidence_id": "EV-PDB-4I65-1",
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          "confidence": "low",
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        "url": "https://www.rcsb.org/structure/4I65"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal nuclease mutant V23I/L25V/I72V/I92V"
    },
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
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        "temperature_c": 19.85
      },
      "construct": {
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      },
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      "data_link": "https://www.rcsb.org/structure/4H7B",
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          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "4H7B",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4H7B"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal nuclease mutant I72V/V99L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.4,
        "salt_mM": null,
        "temperature_c": 26.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4G57",
      "evidence_id": "EV-PDB-4G57-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
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        "unit": "Å",
        "value": 1.81
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4G57"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Staphylococcal Nuclease double mutant I72L, I92L"
    },
    {
      "conditions": {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4F7X",
      "evidence_id": "EV-PDB-4F7X-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "4F7X",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4F7X"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/L25A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4EQP",
      "evidence_id": "EV-PDB-4EQP-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.35
      },
      "provenance": {
        "deposit_id": "4EQP",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4EQP"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I72D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4DF7",
      "evidence_id": "EV-PDB-4DF7-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.5
      },
      "provenance": {
        "deposit_id": "4DF7",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4DF7"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23L/V99I at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/3TP8",
      "evidence_id": "EV-PDB-3TP8-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "3TP8",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/3TP8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4KY5",
      "evidence_id": "EV-PDB-4KY5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.4
      },
      "provenance": {
        "deposit_id": "4KY5",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4KY5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23D at pH 7 and cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4KY6",
      "evidence_id": "EV-PDB-4KY6-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "4KY6",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4KY6"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L25D at pH 6 and cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4KY7",
      "evidence_id": "EV-PDB-4KY7-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.55
      },
      "provenance": {
        "deposit_id": "4KY7",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4KY7"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V74D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4LAA",
      "evidence_id": "EV-PDB-4LAA-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.58
      },
      "provenance": {
        "deposit_id": "4LAA",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4LAA"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36H at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4ME5",
      "evidence_id": "EV-PDB-4ME5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "4ME5",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4ME5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23S/V66A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4MIU",
      "evidence_id": "EV-PDB-4MIU-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.67
      },
      "provenance": {
        "deposit_id": "4MIU",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4MIU"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23T/V99T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4N9P",
      "evidence_id": "EV-PDB-4N9P-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.4
      },
      "provenance": {
        "deposit_id": "4N9P",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4N9P"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23T/L25A/V99T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4N9T",
      "evidence_id": "EV-PDB-4N9T-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "4N9T",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4N9T"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66A/I92S at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4NDX",
      "evidence_id": "EV-PDB-4NDX-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.496
      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
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        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4NKL",
      "evidence_id": "EV-PDB-4NKL-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "unit": "Å",
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      },
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4NKL"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
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    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4NMZ",
      "evidence_id": "EV-PDB-4NMZ-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "4NMZ",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4NMZ"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23Q/V66A at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4NP5",
      "evidence_id": "EV-PDB-4NP5-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.5
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4NP5"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66A/I92N at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4ODG",
      "evidence_id": "EV-PDB-4ODG-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.73
      },
      "provenance": {
        "deposit_id": "4ODG",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4ODG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant V23I/V66I/V74I/V99I at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4OL7",
      "evidence_id": "EV-PDB-4OL7-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.67
      },
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4OL7"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66E A109E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4PMB",
      "evidence_id": "EV-PDB-4PMB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "4PMB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4PMB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylcoccal nuclease variant Delta+PHS I92S at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4PMC",
      "evidence_id": "EV-PDB-4PMC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "4PMC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4PMC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylcoccal nuclease variant Delta+PHS I72K V74K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4PNY",
      "evidence_id": "EV-PDB-4PNY-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.68
      },
      "provenance": {
        "deposit_id": "4PNY",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4PNY"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I72H at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 19.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4QB4",
      "evidence_id": "EV-PDB-4QB4-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "4QB4",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4QB4"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal Structure of Staphylococcal Nuclease mutant V23L/L25V/V66L"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4QF4",
      "evidence_id": "EV-PDB-4QF4-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "4QF4",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4QF4"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant V23M at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "MRD",
          "PO4",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4R8N",
      "evidence_id": "EV-PDB-4R8N-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "4R8N",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4R8N"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant V23I/V66I/I72V/I92V at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": 3.85
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4RKB",
      "evidence_id": "EV-PDB-4RKB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.88
      },
      "provenance": {
        "deposit_id": "4RKB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4RKB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66T/V99T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/4RKL",
      "evidence_id": "EV-PDB-4RKL-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.66
      },
      "provenance": {
        "deposit_id": "4RKL",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/4RKL"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23T/V66T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -173.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
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      "data_link": "https://www.rcsb.org/structure/4S3S",
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        ],
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        "temperature_c": -163.15
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      },
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        ],
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      },
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      },
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        ],
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        "salt_mM": null,
        "temperature_c": -163.15
      },
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      },
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        ],
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      },
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      },
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        ],
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        "temperature_c": -163.15
      },
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      },
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          "rule": "snase-pdtp-bound",
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -163.15
      },
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      },
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          "confidence": "high",
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          "who": "rule:snase-pdtp-bound"
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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        ],
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        "temperature_c": -163.15
      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
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        "salt_mM": null,
        "temperature_c": -163.15
      },
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        {
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      "technique": "xray",
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        ],
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        "ph": 6.0,
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        "temperature_c": -163.15
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92H at cryogenic temperature"
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          "THP"
        ],
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        "ph": 9.0,
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        "temperature_c": -163.15
      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
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          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
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      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62D / V104E at cryogenic temperature"
    },
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          "THP"
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        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
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      "mappings": [
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        "licence": "CC0 1.0 (wwPDB archive data)",
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        "url": "https://www.rcsb.org/structure/5C6A"
      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L25E / N100E at cryogenic temperature"
    },
    {
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        "environment": "in_vitro",
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        "ligands": [
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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      },
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      },
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        ],
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      "source_kind": "deposit",
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        ],
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      },
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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        ],
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      },
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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          "THP"
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      },
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      },
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      "source_kind": "deposit",
      "technique": "xray",
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      },
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      "technique": "xray",
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      },
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      "technique": "xray",
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        "temperature_c": -163.15
      },
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      },
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      "technique": "xray",
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        "temperature_c": -163.15
      },
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      "source_kind": "deposit",
      "technique": "xray",
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    {
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      },
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      },
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
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      },
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      },
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92K at cryogenic temperature"
    },
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        "temperature_c": -163.15
      },
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      },
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        {
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66E at cryogenic temperature"
    },
    {
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        "environment": "in_vitro",
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      },
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        ],
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        ],
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      },
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      },
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        ],
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      "source_kind": "deposit",
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        ],
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      },
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      },
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          "rule": "snase-pdtp-bound",
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      "source_kind": "deposit",
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        ],
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      },
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        {
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          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
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        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
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      },
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      "technique": "xray",
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      },
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      },
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        "temperature_c": -163.15
      },
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        "ph": 6.0,
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        "temperature_c": -173.15
      },
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      "source_kind": "deposit",
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    },
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        ],
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        "ph": 8.0,
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        "temperature_c": -173.15
      },
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      "source_kind": "deposit",
      "technique": "xray",
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        "ph": 6.0,
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        "temperature_c": -163.15
      },
      "construct": {
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      "source_kind": "deposit",
      "technique": "xray",
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        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
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        "temperature_c": -163.15
      },
      "construct": {
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      },
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      "evidence_id": "EV-PDB-5KYI-1",
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        {
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          "rule": "snase-pdtp-bound",
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          "who": "rule:snase-pdtp-bound"
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      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62K/V66E pH 9 at cryogenic temperature"
    },
    {
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        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.15,
        "salt_mM": null,
        "temperature_c": 5.0
      },
      "construct": {
        "description": "STAPHYLOCOCCAL NUCLEASE (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5NUC",
      "evidence_id": "EV-PDB-5NUC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.1
      },
      "provenance": {
        "deposit_id": "5NUC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
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        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5NUC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "STAPHYLOCOCCAL NUCLEASE, 1-N-PENTANE THIOL DISULFIDE TO V23C VARIANT"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6B8R",
      "evidence_id": "EV-PDB-6B8R-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.65
      },
      "provenance": {
        "deposit_id": "6B8R",
        "doi": "10.1021/acs.jpcb.7b12121",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6B8R"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23K/L36Q at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6EEG",
      "evidence_id": "EV-PDB-6EEG-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.95
      },
      "provenance": {
        "deposit_id": "6EEG",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6EEG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylcoccal nuclease variant Delta+PHS T62E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -196.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6OK8",
      "evidence_id": "EV-PDB-6OK8-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "6OK8",
        "doi": "10.1107/S2059798319013226",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6OK8"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS K127L at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -196.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6U0X",
      "evidence_id": "EV-PDB-6U0X-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.86
      },
      "provenance": {
        "deposit_id": "6U0X",
        "doi": "10.1107/S2059798319013226",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6U0X"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS Q123D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSB",
      "evidence_id": "EV-PDB-6XSB-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.95
      },
      "provenance": {
        "deposit_id": "6XSB",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSB"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS A132S at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSC",
      "evidence_id": "EV-PDB-6XSC-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "6XSC",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSC"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSE",
      "evidence_id": "EV-PDB-6XSE-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.1
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSE"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS F34Y at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSF",
      "evidence_id": "EV-PDB-6XSF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
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        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "6XSF",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T41V at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSG",
      "evidence_id": "EV-PDB-6XSG-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSH",
      "evidence_id": "EV-PDB-6XSH-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "6XSH",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSH"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62V at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6XSI",
      "evidence_id": "EV-PDB-6XSI-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.0
      },
      "provenance": {
        "deposit_id": "6XSI",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6XSI"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V104T at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 36.85
      },
      "construct": {
        "description": "Disordered protein(D131D) (chains B)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/8K2R",
      "evidence_id": "EV-PDB-8K2R-2",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "8K2R",
        "doi": "10.1038/s41594-024-01337-z",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/8K2R"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "The structure of HtpG M domain in complex with unstructured D131D binding site b"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": 36.85
      },
      "construct": {
        "description": "Nuclease A (chains C)",
        "labels": []
      },
      "data_format": "mmCIF + NMR restraints",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/8K2T",
      "evidence_id": "EV-PDB-8K2T-2",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "structure",
        "uncertainty": null,
        "unit": null,
        "value": null
      },
      "provenance": {
        "deposit_id": "8K2T",
        "doi": "10.1038/s41594-024-01337-z",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/8K2T"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "nmr_structure",
      "title": "Solution structure of full-length HtpG in complex with D131D"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Nuclease A (chains A,B)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/9C11",
      "evidence_id": "EV-PDB-9C11-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.95
      },
      "provenance": {
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        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/9C11"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS L36R at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/9CU9",
      "evidence_id": "EV-PDB-9CU9-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "9CU9",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/9CU9"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V23D/L36K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -196.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6U0W",
      "evidence_id": "EV-PDB-6U0W-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "6U0W",
        "doi": "10.1107/S2059798319013226",
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6U0W"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS K133M at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/6EEK",
      "evidence_id": "EV-PDB-6EEK-1",
      "mappings": [
        {
          "confidence": "low",
          "justification": "Experimental structure without pdTp; variants (for example the Δ+PHS series) are still native folds.",
          "rule": "snase-apo-structures",
          "state_id": "SNase-apo",
          "who": "rule:snase-apo-structures"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 2.2
      },
      "provenance": {
        "deposit_id": "6EEK",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/6EEK"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of apo Staphylcoccal nuclease variant Delta+PHS T62E/V66K, pH 7 at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5KYL",
      "evidence_id": "EV-PDB-5KYL-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
        "deposit_id": "5KYL",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5KYL"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62K/V66E pH 7 at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5KIX",
      "evidence_id": "EV-PDB-5KIX-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.75
      },
      "provenance": {
        "deposit_id": "5KIX",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5KIX"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I92E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5KGU",
      "evidence_id": "EV-PDB-5KGU-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.9
      },
      "provenance": {
        "deposit_id": "5KGU",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5KGU"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS N118D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 7.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5K5P",
      "evidence_id": "EV-PDB-5K5P-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.83
      },
      "provenance": {
        "deposit_id": "5K5P",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5K5P"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS I72K L103K at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 6.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IOD",
      "evidence_id": "EV-PDB-5IOD-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.6
      },
      "provenance": {
        "deposit_id": "5IOD",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IOD"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66H/V99E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IIF",
      "evidence_id": "EV-PDB-5IIF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.85
      },
      "provenance": {
        "deposit_id": "5IIF",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IIF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IGG",
      "evidence_id": "EV-PDB-5IGG-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "5IGG",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IGG"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS V66H/I72E at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 8.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IGF",
      "evidence_id": "EV-PDB-5IGF-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.7
      },
      "provenance": {
        "deposit_id": "5IGF",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IGF"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62H/V66D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IGE",
      "evidence_id": "EV-PDB-5IGE-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "5IGE",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IGE"
      },
      "reader": null,
      "source_kind": "deposit",
      "technique": "xray",
      "title": "Crystal structure of Staphylococcal nuclease variant Delta+PHS T62H/V99D at cryogenic temperature"
    },
    {
      "conditions": {
        "applied_force_pn": null,
        "buffer": null,
        "environment": "in_vitro",
        "ions": [],
        "ligands": [
          "CA",
          "THP"
        ],
        "notes": "Entry-level ligand list; oligosaccharides appear as branched entities. pH and temperature are null when not deposited in machine-readable fields.",
        "ph": 9.0,
        "salt_mM": null,
        "temperature_c": -163.15
      },
      "construct": {
        "description": "Thermonuclease (chains A)",
        "labels": []
      },
      "data_format": "mmCIF + structure factors",
      "data_level": "processed",
      "data_link": "https://www.rcsb.org/structure/5IGD",
      "evidence_id": "EV-PDB-5IGD-1",
      "mappings": [
        {
          "confidence": "high",
          "justification": "pdTp (ligand THP) bound in the active site.",
          "rule": "snase-pdtp-bound",
          "state_id": "SNase-pdTp",
          "who": "rule:snase-pdtp-bound"
        }
      ],
      "molecule_id": "P00644",
      "observable": {
        "type": "resolution",
        "uncertainty": null,
        "unit": "Å",
        "value": 1.8
      },
      "provenance": {
        "deposit_id": "5IGD",
        "doi": null,
        "licence": "CC0 1.0 (wwPDB archive data)",
        "retrieved": "2026-10-19",
        "source": "RCSB PDB",
        "url": "https://www.rcsb.org/structure/5IGD"
      },
      "reader": null,
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