<?xml version="1.0" encoding="UTF-8" ?>

<PDBx:datablock datablockName="DB2"
   xmlns:PDBx="http://pdbml.pdb.org/schema/pdbx-v50.xsd"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://pdbml.pdb.org/schema/pdbx-v50.xsd pdbx-v50.xsd">

   <PDBx:chem_compCategory>
      <PDBx:chem_comp id="DB2">
         <PDBx:formula>Cu3 Mo S4</PDBx:formula>
         <PDBx:formula_weight>414.838</PDBx:formula_weight>
         <PDBx:name>Cu3MoS4 cluster</PDBx:name>
         <PDBx:pdbx_ambiguous_flag>N</PDBx:pdbx_ambiguous_flag>
         <PDBx:pdbx_comp_type>metal-containing ligand</PDBx:pdbx_comp_type>
         <PDBx:pdbx_ideal_coordinates_details>MetalCoord</PDBx:pdbx_ideal_coordinates_details>
         <PDBx:pdbx_ideal_coordinates_missing_flag>N</PDBx:pdbx_ideal_coordinates_missing_flag>
         <PDBx:pdbx_initial_date>2026-04-20</PDBx:pdbx_initial_date>
         <PDBx:pdbx_model_coordinates_db_code>3K7R</PDBx:pdbx_model_coordinates_db_code>
         <PDBx:pdbx_model_coordinates_missing_flag>N</PDBx:pdbx_model_coordinates_missing_flag>
         <PDBx:pdbx_modified_date>2026-09-16</PDBx:pdbx_modified_date>
         <PDBx:pdbx_processing_site>RCSB</PDBx:pdbx_processing_site>
         <PDBx:pdbx_release_status>REL</PDBx:pdbx_release_status>
         <PDBx:pdbx_type>HETAIN</PDBx:pdbx_type>
         <PDBx:type>non-polymer</PDBx:type>
      </PDBx:chem_comp>
   </PDBx:chem_compCategory>
   <PDBx:chem_comp_atomCategory>
      <PDBx:chem_comp_atom atom_id="CU" comp_id="DB2">
         <PDBx:alt_atom_id>CU1</PDBx:alt_atom_id>
         <PDBx:model_Cartn_x>14.040</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>35.432</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>20.084</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>0</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>CU</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>14.088</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>35.429</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>20.061</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>1</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>CU</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="CU1" comp_id="DB2">
         <PDBx:alt_atom_id>CU2</PDBx:alt_atom_id>
         <PDBx:model_Cartn_x>17.123</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>34.495</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>22.286</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>0</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>CU1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>17.128</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>34.476</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>22.225</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>2</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>CU</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="CU2" comp_id="DB2">
         <PDBx:alt_atom_id>CU3</PDBx:alt_atom_id>
         <PDBx:model_Cartn_x>17.562</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>35.627</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>18.584</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>0</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>CU2</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>17.551</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>35.614</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>18.570</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>3</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>CU</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="S1" comp_id="DB2">
         <PDBx:alt_atom_id>S1</PDBx:alt_atom_id>
         <PDBx:charge>-2</PDBx:charge>
         <PDBx:model_Cartn_x>15.546</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>36.570</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>18.789</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>S1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>15.551</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>36.637</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>18.829</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>4</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>S</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="MO1" comp_id="DB2">
         <PDBx:alt_atom_id>MO1</PDBx:alt_atom_id>
         <PDBx:model_Cartn_x>16.358</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>36.776</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>20.819</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>0</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>MO1</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>16.405</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>36.732</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>20.826</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>5</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>MO</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="S2" comp_id="DB2">
         <PDBx:alt_atom_id>S2</PDBx:alt_atom_id>
         <PDBx:charge>-2</PDBx:charge>
         <PDBx:model_Cartn_x>15.126</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>35.484</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>22.087</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>S2</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>15.110</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>35.605</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>22.172</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>6</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>S</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="S3" comp_id="DB2">
         <PDBx:alt_atom_id>S3</PDBx:alt_atom_id>
         <PDBx:charge>-2</PDBx:charge>
         <PDBx:model_Cartn_x>18.304</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>35.732</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>20.793</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>S3</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>18.367</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>35.779</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>20.770</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>7</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>S</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
      <PDBx:chem_comp_atom atom_id="S4" comp_id="DB2">
         <PDBx:alt_atom_id>S4</PDBx:alt_atom_id>
         <PDBx:charge>-2</PDBx:charge>
         <PDBx:model_Cartn_x>16.642</PDBx:model_Cartn_x>
         <PDBx:model_Cartn_y>38.843</PDBx:model_Cartn_y>
         <PDBx:model_Cartn_z>21.530</PDBx:model_Cartn_z>
         <PDBx:pdbx_align>1</PDBx:pdbx_align>
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_component_atom_id>S4</PDBx:pdbx_component_atom_id>
         <PDBx:pdbx_component_comp_id>DB2</PDBx:pdbx_component_comp_id>
         <PDBx:pdbx_leaving_atom_flag>N</PDBx:pdbx_leaving_atom_flag>
         <PDBx:pdbx_model_Cartn_x_ideal>16.579</PDBx:pdbx_model_Cartn_x_ideal>
         <PDBx:pdbx_model_Cartn_y_ideal>38.802</PDBx:pdbx_model_Cartn_y_ideal>
         <PDBx:pdbx_model_Cartn_z_ideal>21.487</PDBx:pdbx_model_Cartn_z_ideal>
         <PDBx:pdbx_ordinal>8</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:type_symbol>S</PDBx:type_symbol>
      </PDBx:chem_comp_atom>
   </PDBx:chem_comp_atomCategory>
   <PDBx:chem_comp_bondCategory>
      <PDBx:chem_comp_bond atom_id_1="CU" atom_id_2="S1" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>1</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="CU" atom_id_2="S2" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>2</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="CU1" atom_id_2="S2" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>3</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="CU1" atom_id_2="S3" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>4</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="CU2" atom_id_2="S1" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>5</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="CU2" atom_id_2="S3" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>6</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="S1" atom_id_2="MO1" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>7</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="MO1" atom_id_2="S2" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>8</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="MO1" atom_id_2="S3" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>9</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
      <PDBx:chem_comp_bond atom_id_1="MO1" atom_id_2="S4" comp_id="DB2">
         <PDBx:pdbx_aromatic_flag>N</PDBx:pdbx_aromatic_flag>
         <PDBx:pdbx_ordinal>10</PDBx:pdbx_ordinal>
         <PDBx:pdbx_stereo_config>N</PDBx:pdbx_stereo_config>
         <PDBx:value_order>sing</PDBx:value_order>
      </PDBx:chem_comp_bond>
   </PDBx:chem_comp_bondCategory>
   <PDBx:pdbx_chem_comp_auditCategory>
      <PDBx:pdbx_chem_comp_audit action_type="Create component" comp_id="DB2" date="2026-04-20">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Modify subcomponent list" comp_id="DB2" date="2026-05-11">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Other modification" comp_id="DB2" date="2026-07-31">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Initial release" comp_id="DB2" date="2026-08-12">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Other modification" comp_id="DB2" date="2026-09-01">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
      <PDBx:pdbx_chem_comp_audit action_type="Other modification" comp_id="DB2" date="2026-09-16">
         <PDBx:processing_site>RCSB</PDBx:processing_site>
      </PDBx:pdbx_chem_comp_audit>
   </PDBx:pdbx_chem_comp_auditCategory>
   <PDBx:pdbx_chem_comp_descriptorCategory>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="InChI" program_version="1.06" type="InChI">
         <PDBx:descriptor>InChI=1S/3Cu.Mo.H2S.3S/h;;;;1H2;;;/q;;;+1;;;;/p-1</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="InChI" program_version="1.06" type="InChIKey">
         <PDBx:descriptor>RAUMDAAFCYPDAN-UHFFFAOYSA-M</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="CACTVS" program_version="3.385" type="SMILES_CANONICAL">
         <PDBx:descriptor>S.[Mo].S1[Cu]S[Cu]S[Cu]1</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="CACTVS" program_version="3.385" type="SMILES">
         <PDBx:descriptor>S.[Mo].S1[Cu]S[Cu]S[Cu]1</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="OpenEye OEToolkits" program_version="2.0.7" type="SMILES_CANONICAL">
         <PDBx:descriptor>[S][Mo]12[S]3[Cu][S]1[Cu][S]2[Cu]3</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
      <PDBx:pdbx_chem_comp_descriptor comp_id="DB2" program="OpenEye OEToolkits" program_version="2.0.7" type="SMILES">
         <PDBx:descriptor>[S][Mo]12[S]3[Cu][S]1[Cu][S]2[Cu]3</PDBx:descriptor>
      </PDBx:pdbx_chem_comp_descriptor>
   </PDBx:pdbx_chem_comp_descriptorCategory>
</PDBx:datablock>
