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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：Q12129 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
Q12129 8rd3 Nonsense-mediated decay protein 4 Author chain B Reference sequence 2–218 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
Q12129 8rdd Nonsense-mediated decay protein 4 Author chain B Reference sequence 2–167 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q12129 9qdq Nonsense-mediated decay protein 4 Author chain C Reference sequence 1–218 1 Protein–RNA Heteromer Protein 3 RNA 1 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.