A0A1V3BMC2 · A0A1V3BMC2_HELPX

Function

function

Small subunit of the glutamine-dependent carbamoyl phosphate synthetase (CPSase). CPSase catalyzes the formation of carbamoyl phosphate from the ammonia moiety of glutamine, carbonate, and phosphate donated by ATP, constituting the first step of 2 biosynthetic pathways, one leading to arginine and/or urea and the other to pyrimidine nucleotides. The small subunit (glutamine amidotransferase) binds and cleaves glutamine to supply the large subunit with the substrate ammonia.

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

Pathway

Amino-acid biosynthesis; L-arginine biosynthesis; carbamoyl phosphate from bicarbonate: step 1/1.
Pyrimidine metabolism; UMP biosynthesis via de novo pathway; (S)-dihydroorotate from bicarbonate: step 1/3.

Features

Showing features for binding site, active site.

TypeIDPosition(s)Description
Binding site44L-glutamine (UniProtKB | ChEBI)
Binding site240L-glutamine (UniProtKB | ChEBI)
Binding site242L-glutamine (UniProtKB | ChEBI)
Active site268Nucleophile
Binding site269L-glutamine (UniProtKB | ChEBI)
Binding site272L-glutamine (UniProtKB | ChEBI)
Binding site310L-glutamine (UniProtKB | ChEBI)
Binding site313L-glutamine (UniProtKB | ChEBI)
Active site351
Active site353

GO annotations

AspectTerm
Cellular Componentcarbamoyl-phosphate synthase complex
Molecular FunctionATP binding
Molecular Functioncarbamoyl-phosphate synthase (glutamine-hydrolyzing) activity
Molecular Functionglutaminase activity
Biological Process'de novo' pyrimidine nucleobase biosynthetic process
Biological Process'de novo' UMP biosynthetic process
Biological Processarginine biosynthetic process
Biological Processglutamine metabolic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Carbamoyl phosphate synthase small chain
  • EC number
  • Alternative names
    • Carbamoyl phosphate synthetase glutamine chain

Gene names

    • Name
      carA
    • ORF names
      BZK24_01605

Organism names

Accessions

  • Primary accession
    A0A1V3BMC2

Proteomes

Subcellular Location

Interaction

Subunit

Composed of two chains; the small (or glutamine) chain promotes the hydrolysis of glutamine to ammonia, which is used by the large (or ammonia) chain to synthesize carbamoyl phosphate. Tetramer of heterodimers (alpha,beta)4.

Family & Domains

Features

Showing features for domain, region.

TypeIDPosition(s)Description
Domain1-129Carbamoyl-phosphate synthase small subunit N-terminal
Region1-177CPSase

Sequence similarities

Belongs to the CarA family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    375
  • Mass (Da)
    41,628
  • Last updated
    2017-06-07 v1
  • Checksum
    C46C87B18177454E
MVSLYLENGLFLQAQSFGASGTQVGELVFNTSMSGYQEVISDPSYKGQFVVFSMPEIGVVGANSKDDESFFSCTGVLARHYNEFFSNSRADSSLSVYLKKRGVLGICGIDTRSLIKTLRHYGCLMIVASTIEHDKNKLEEILKNAPKISHSPLVSSVSTPKIITHQRATFDFNTLDYKPFDEKTSHKIIAVLDFGAKGNILNELQNVGLKALIYPHHTKASELIKAYEKKEISGIFLSNGPGDPLSLQQEIGEIKRLIDAKIPMFGICLGHQLLSIAQGYPTYKLKFGHHGSNHPVKNLKTNAVEITAQNHNYCVPEEIEEIAVITHRNLFDNTIEGVRYKNAPIISVQHHPESSPGPKESHYIFKEFVGLLKGF

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MTWR01000008
EMBL· GenBank· DDBJ
OOC34790.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.
FeedbackHelp