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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P32989 New Search
3PDB entries
3Biological assembly
3chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
P32989 2h7f DNA topoisomerase 1 Author chain X Reference sequence 1–314 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
P32989 2h7g DNA topoisomerase 1 Author chain X Reference sequence 1–314 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
P32989 3igc DNA topoisomerase 1 Author chain A Reference sequence 1–314 1 Protein–DNA Monomer Protein 1 DNA 3 tetrameric （4） Consistent with all polymers

“Homomeric versus heteromeric classification follows protein identity; different constructs of the same UniProt entry still require comparison of reference-sequence ranges, mutations and missing segments. Assemblies marked for review remain visible but are not included in the highest-confidence candidate set.