A0A1B7HSH6 · A0A1B7HSH6_9ENTR

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 site50thiamine diphosphate (UniProtKB | ChEBI)
Binding site251-254FAD (UniProtKB | ChEBI)
Binding site274-278FAD (UniProtKB | ChEBI)
Binding site292FAD (UniProtKB | ChEBI)
Binding site407-409thiamine diphosphate (UniProtKB | ChEBI)
Binding site434Mg2+ (UniProtKB | ChEBI)
Binding site434-436thiamine diphosphate (UniProtKB | ChEBI)
Binding site461Mg2+ (UniProtKB | ChEBI)
Binding site461-467thiamine diphosphate (UniProtKB | ChEBI)
Site466Moves 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
      M977_03511

Organism names

  • Taxonomic identifier
  • Strain
    • ATCC 51604
  • Taxonomic lineage
    Bacteria > Pseudomonadota > Gammaproteobacteria > Enterobacterales > Enterobacteriaceae > Buttiauxella

Accessions

  • Primary accession
    A0A1B7HSH6

Proteomes

Subcellular Location

Cell membrane
; Peripheral membrane protein

Keywords

Interaction

Subunit

Homotetramer.

Family & Domains

Features

Showing features for domain, region.

TypeIDPosition(s)Description
Domain4-115Thiamine pyrophosphate enzyme N-terminal TPP-binding
Region183-334FAD-binding domain
Domain191-319Thiamine pyrophosphate enzyme central
Domain380-526Thiamine pyrophosphate enzyme TPP-binding
Region532-573Membrane-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.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    573
  • Mass (Da)
    61,877
  • Last updated
    2016-11-02 v1
  • Checksum
    3D149FD3C25CCE60
MKQTVAAYLAKTLESAGVKRIWGVTGDSLNGLSDSLNRMGTIQWMPTRHEEVAAFAAGAEAHLSGELAVCAGSCGPGNLHLINGLFDCHRNRVPVLAIAAHIPSSEIGSGYFQETHPEELFRECSHYCELVSSPEQIPQVLAIAMRKAVLNRGVSVVVLPGDVALKPAPETASTHWYPAPQPIIVPPHDELKKLAQLLRYNDNIALMCGSGCAGAHEELVQFAATLKAPIVHALRGKEHVEYDNPYDVGMTGLIGFSSGFHTMMNADTLILLGTQFPYRAFYPTDAKIIQIDINPGSIGAHSKVDMALVGDIKATLAALIPLLEEKTDRSFLDKALDNYREARESLDELAQPGDGNVIHPQYVAQQISRYADEDAIFTCDVGTPTVWAARYLKMNGKRRLIGSFTHGSMANAMPQALGAKATAPDRQVIAMCGDGGFSMLMGDFLSVVQMKLPIKIVVFNNSVLGFVAMEMKAGGYLTDGTELHDTNFASIANACGITGIRVEKAADLDNALQRALSIDGPVLVDVVVAKDELAIPPQIKLEQAKGFSLYMLRAIISGRGDEVIELAKTNWFR

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
LXEP01000031
EMBL· GenBank· DDBJ
OAT18589.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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