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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：Q3Y5H1 New Search
2PDB entries
3Biological assembly
8chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain A Reference sequence 1–307 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain B Reference sequence 1–307 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain C Reference sequence 1–307 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain A Reference sequence 1–307 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain B Reference sequence 1–307 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q3Y5H1 2q6d Infectious bronchitis virus (IBV) main protease Author chain C Reference sequence 1–307 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q3Y5H1 2q6f Infectious bronchitis virus (IBV) main protease Author chain A Reference sequence 1–307 1 Protein heterocomplex Heteromer Protein 4 tetrameric （4） Consistent with protein count
Q3Y5H1 2q6f Infectious bronchitis virus (IBV) main protease Author chain B Reference sequence 1–307 1 Protein heterocomplex Heteromer Protein 4 tetrameric （4） Consistent with protein count

“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.