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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：A0A140N548 New Search
2PDB entries
2Biological assembly
2chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
A0A140N548 7otc 30S ribosomal protein S4 Author chain d Reference sequence 2–206 1 Protein–RNA Heteromer Protein 49 RNA 3 52-meric （52） Consistent with all polymers
A0A140N548 9gr1 Small ribosomal subunit protein uS4 Author chain D Reference sequence 1–206 1 Protein–RNA Heteromer Protein 48 RNA 7 55-meric （55） 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.