A0A1Q8SXQ6 · A0A1Q8SXQ6_9GAMM

  • Protein
    Pyruvate dehydrogenase [ubiquinone]
  • Gene
    poxB
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    4/5

Function

function

A peripheral cell membrane enzyme that catalyzes the oxidative decarboxylation of pyruvate to form acetate and CO2. It channels electrons from the cytoplasm to the respiratory chain at the cell membrane via ubiquinone.

Caution

Lacks conserved residue(s) required for the propagation of feature annotation.
The sequence shown here is derived from an EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is preliminary data.

Catalytic activity

Cofactor

Protein has several cofactor binding sites:
FAD (UniProtKB | Rhea| CHEBI:57692 )

Note: Binds 1 FAD per subunit.
Mg2+ (UniProtKB | Rhea| CHEBI:18420 )

Note: Binds 1 Mg2+ ion per subunit.
thiamine diphosphate (UniProtKB | Rhea| CHEBI:58937 )

Note: Binds 1 thiamine pyrophosphate per subunit.

Activity regulation

The C-terminus inhibits activity; it has to move for the enzyme to be active. Activated by lipid-binding, which occurs via the C-terminus.

Features

Showing features for binding site, site.

TypeIDPosition(s)Description
Binding site57thiamine diphosphate (UniProtKB | ChEBI)
Binding site258-261FAD (UniProtKB | ChEBI)
Binding site281-285FAD (UniProtKB | ChEBI)
Binding site299FAD (UniProtKB | ChEBI)
Binding site415-417thiamine diphosphate (UniProtKB | ChEBI)
Binding site442Mg2+ (UniProtKB | ChEBI)
Binding site442-444thiamine diphosphate (UniProtKB | ChEBI)
Binding site469Mg2+ (UniProtKB | ChEBI)
Binding site469-475thiamine diphosphate (UniProtKB | ChEBI)
Site474Moves into active site upon enzyme activation, plays a role in electron transfer

GO annotations

AspectTerm
Cellular Componentplasma membrane
Molecular Functionflavin adenine dinucleotide binding
Molecular Functionlipid binding
Molecular Functionmagnesium ion binding
Molecular Functionpyruvate dehydrogenase (quinone) activity
Molecular Functionthiamine pyrophosphate binding
Molecular Functionubiquinone binding
Biological Processpyruvate catabolic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Pyruvate dehydrogenase [ubiquinone]
  • EC number
  • Alternative names
    • Pyruvate oxidase
      (POX
      )
    • Pyruvate:ubiquinone-8 oxidoreductase

Gene names

    • Name
      poxB
    • ORF names
      BTW07_01665

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • SMB35
  • Taxonomic lineage
    Bacteria > Pseudomonadota > Gammaproteobacteria > Oceanospirillales > Halomonadaceae > Salinicola

Accessions

  • Primary accession
    A0A1Q8SXQ6

Proteomes

Subcellular Location

Cell membrane
; Peripheral membrane protein

Keywords

Interaction

Subunit

Homotetramer.

Protein-protein interaction databases

Family & Domains

Features

Showing features for domain, region.

TypeIDPosition(s)Description
Domain11-122Thiamine pyrophosphate enzyme N-terminal TPP-binding
Region190-341FAD-binding domain
Domain200-325Thiamine pyrophosphate enzyme central
Domain388-534Thiamine pyrophosphate enzyme TPP-binding
Region540-581Membrane-binding domain

Domain

Has 4 domains; the Pyr domain which binds the pyrimidine moiety of the thiamine pyrophosphate cofactor, the FAD-binding domain, the PP-binding domain which binds the pyrophosphate portion of thiamine pyrophosphate and the C-terminal membrane binding region. The C-terminus is held closely against the rest of the protein and covers the active site; during activation it unfolds from the rest of the protein and forms an amphipathic helix upon membrane binding, exposing the active site.

Sequence similarities

Belongs to the TPP enzyme family.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    581
  • Mass (Da)
    62,518
  • Last updated
    2017-04-12 v1
  • Checksum
    AF82586CD6F93739
MTFFGKAGTLSVADLITQTLADIGVERIWGVTGDSLNAINDSLRRLGSIQWMHVRNEETGAFAAGAEASATGKLAVCAGSCGPGHLHLINGLYDCQRNHVPVLAIAAHIPSSEIGLGYFQETRPTELFRECSHFCEMVQDPAQLPELLHRAIRTAIGQRGVAVLVIPGDVSMKDAPAHARAEMPPLFEPRIVPNADEIGTLAETLNASKAVTLLCGSGVAGSHAEVVALADALGAPIVHAFRGKEHIEWDNPFDVGMTGLIGFSSGYHAMMECDTLLMLGTDFPYRNFYPEKATIVQIDRDPSALGRRAQLHQGIVGDVSEAATMLRPLIAGGRDRTFLDKALRHYRKAREGLDDLAAPREGDKPLHPQYVARMVNDLATDDAIFTADVGTPSVWAARYLTMNGKRRLIGSFNHGSMANAMPQALGAQAAYPGRQVVSLSGDGGLTMMMGDLLTAIQMQLPIKIVVFNNGTLGFVELEQKASGYLDTNVSLKNPDFGAIAREMGFFGQRVTRSDQLGTVLREAFAHDGPALVDVVTDGMELVMPPKIKAQQVAGFSLYSTHAIMNGRGDELVELARTNLLR

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MSDO01000001
EMBL· GenBank· DDBJ
OLO06225.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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