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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：P21853 New Search
24PDB entries
24Biological assembly
24chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
P21853 1h2a HYDROGENASE Author chain S Reference sequence 1–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1h2r PROTEIN (PERIPLASMIC [NIFE] HYDROGENASE SMALL SUBUNIT) Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubh Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubj Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubk Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubl Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubm Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubo Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubr Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubt Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1ubu Periplasmic [NiFe] hydrogenase Small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1wuh Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1wui Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1wuj Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1wuk Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 1wul Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 4u9h Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 53–317 1 Protein heterocomplex Heteromer Protein 2 Dimeric （2） Consistent with protein count
P21853 4u9i Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 53–317 1 Protein heterocomplex Heteromer Protein 2 Dimeric （2） Consistent with protein count
P21853 5xle Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 5xlf Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 5xlg Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 5xlh Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 5y4n Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 51–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
P21853 8w6x Periplasmic [NiFe] hydrogenase small subunit Author chain S Reference sequence 52–317 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） 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.