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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：Q6UB84 New Search
2PDB entries
2Biological assembly
3chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
Q6UB84 1sd4 PENICILLINASE REPRESSOR Author chain A Reference sequence 1–126 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
Q6UB84 1sd4 PENICILLINASE REPRESSOR Author chain B Reference sequence 1–126 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
Q6UB84 1xsd penicillinase repressor Author chain A Reference sequence 1–126 1 Protein–DNA Homooligomer Protein 2 DNA 2 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.