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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：Q9ZNN8 New Search
2PDB entries
3Biological assembly
22chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain A Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain B Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain C Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain D Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain E Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain F Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain G Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain H Reference sequence 1–258 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain A Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain B Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain C Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain D Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain E Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain F Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain G Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3a28 L-2.3-butanediol dehydrogenase Author chain H Reference sequence 1–258 2 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain A Reference sequence 86–120 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain A Reference sequence 137–163 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain A Reference sequence 184–235 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain B Reference sequence 86–120 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain B Reference sequence 137–163 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9ZNN8 3wye ;Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming],L-2,3-butanediol dehydrogenase,Diacetyl reductase [(S)-acetoin forming] ; Author chain B Reference sequence 184–235 1 Insufficient information Homooligomer 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.