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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：O66858 New Search
6PDB entries
7Biological assembly
9chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
O66858 2ahq RNA polymerase sigma factor RpoN Author chain A Reference sequence 323–398 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
O66858 2k9l RNA polymerase sigma factor RpoN Author chain A Reference sequence 60–135 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
O66858 2k9m RNA polymerase sigma factor RpoN Author chain A Reference sequence 69–198 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
O66858 2o8k RNA polymerase sigma factor RpoN Author chain A Reference sequence 338–398 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
O66858 2o9l RNA polymerase sigma factor RpoN Author chain A Reference sequence 338–398 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
O66858 5ui5 RNA polymerase sigma factor RpoN Author chain I Reference sequence 61–398 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
O66858 5ui5 RNA polymerase sigma factor RpoN Author chain V Reference sequence 61–398 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
O66858 5ui5 RNA polymerase sigma factor RpoN Author chain I Reference sequence 61–398 2 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
O66858 5ui5 RNA polymerase sigma factor RpoN Author chain V Reference sequence 61–398 2 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） 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.