P58939 · CARB_CORGL

Function

function

Large 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 large subunit (synthetase) binds the substrates ammonia (free or transferred from glutamine from the small subunit), hydrogencarbonate and ATP and carries out an ATP-coupled ligase reaction, activating hydrogencarbonate by forming carboxy phosphate which reacts with ammonia to form carbamoyl phosphate.

Catalytic activity

Cofactor

Mg2+ (UniProtKB | Rhea| CHEBI:18420 )

Mn2+ (UniProtKB | Rhea| CHEBI:29035 )

Note: Binds 4 Mg2+ or Mn2+ ions per subunit.

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.

TypeIDPosition(s)Description
Binding site134ATP 1 (UniProtKB | ChEBI)
Binding site174ATP 1 (UniProtKB | ChEBI)
Binding site180ATP 1 (UniProtKB | ChEBI)
Binding site181ATP 1 (UniProtKB | ChEBI)
Binding site213ATP 1 (UniProtKB | ChEBI)
Binding site215ATP 1 (UniProtKB | ChEBI)
Binding site220ATP 1 (UniProtKB | ChEBI)
Binding site246ATP 1 (UniProtKB | ChEBI)
Binding site247ATP 1 (UniProtKB | ChEBI)
Binding site248ATP 1 (UniProtKB | ChEBI)
Binding site290ATP 1 (UniProtKB | ChEBI)
Binding site290Mg2+ 1 (UniProtKB | ChEBI)
Binding site290Mn2+ 1 (UniProtKB | ChEBI)
Binding site304ATP 1 (UniProtKB | ChEBI)
Binding site304Mg2+ 1 (UniProtKB | ChEBI)
Binding site304Mg2+ 2 (UniProtKB | ChEBI)
Binding site304Mn2+ 1 (UniProtKB | ChEBI)
Binding site304Mn2+ 2 (UniProtKB | ChEBI)
Binding site306Mg2+ 2 (UniProtKB | ChEBI)
Binding site306Mn2+ 2 (UniProtKB | ChEBI)
Binding site731ATP 2 (UniProtKB | ChEBI)
Binding site770ATP 2 (UniProtKB | ChEBI)
Binding site772ATP 2 (UniProtKB | ChEBI)
Binding site777ATP 2 (UniProtKB | ChEBI)
Binding site802ATP 2 (UniProtKB | ChEBI)
Binding site803ATP 2 (UniProtKB | ChEBI)
Binding site804ATP 2 (UniProtKB | ChEBI)
Binding site805ATP 2 (UniProtKB | ChEBI)
Binding site845ATP 2 (UniProtKB | ChEBI)
Binding site845Mg2+ 3 (UniProtKB | ChEBI)
Binding site845Mn2+ 3 (UniProtKB | ChEBI)
Binding site857ATP 2 (UniProtKB | ChEBI)
Binding site857Mg2+ 3 (UniProtKB | ChEBI)
Binding site857Mg2+ 4 (UniProtKB | ChEBI)
Binding site857Mn2+ 3 (UniProtKB | ChEBI)
Binding site857Mn2+ 4 (UniProtKB | ChEBI)
Binding site859Mg2+ 4 (UniProtKB | ChEBI)
Binding site859Mn2+ 4 (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentcytoplasm
Molecular FunctionATP binding
Molecular Functioncarbamoyl-phosphate synthase (ammonia) activity
Molecular Functioncarbamoyl-phosphate synthase (glutamine-hydrolyzing) activity
Molecular Functionmetal ion binding
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 large chain
  • EC number
  • Alternative names
    • Carbamoyl phosphate synthetase ammonia chain

Gene names

    • Name
      carB
    • Ordered locus names
      Cgl1609, cg1813

Organism names

Accessions

  • Primary accession
    P58939

Proteomes

Subcellular Location

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00001450001-1113Carbamoyl phosphate synthase large chain

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.

Protein-protein interaction databases

Structure

Family & Domains

Features

Showing features for region, domain.

TypeIDPosition(s)Description
Region1-407Carboxyphosphate synthetic domain
Domain138-333ATP-grasp 1
Region408-565Oligomerization domain
Region566-967Carbamoyl phosphate synthetic domain
Domain695-886ATP-grasp 2
Domain968-1113MGS-like
Region968-1113Allosteric domain

Domain

The large subunit is composed of 2 ATP-grasp domains that are involved in binding the 2 ATP molecules needed for carbamoyl phosphate synthesis. The N-terminal ATP-grasp domain (referred to as the carboxyphosphate synthetic component) catalyzes the ATP-dependent phosphorylation of hydrogencarbonate to carboxyphosphate and the subsequent nucleophilic attack by ammonia to form a carbamate intermediate. The C-terminal ATP-grasp domain (referred to as the carbamoyl phosphate synthetic component) then catalyzes the phosphorylation of carbamate with the second ATP to form the end product carbamoyl phosphate. The reactive and unstable enzyme intermediates are sequentially channeled from one active site to the next through the interior of the protein over a distance of at least 96 A.

Sequence similarities

Belongs to the CarB family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    1,113
  • Mass (Da)
    120,037
  • Last updated
    2002-08-02 v1
  • Checksum
    85D2DA1A4DFF66CA
MPKRSDINHVLVIGSGPIVIGQACEFDYSGTQACRVLKEEGLRVTLINSNPATIMTDPEMADHTYVEPIEPEYIDKIFAKEIEQGHPIDAVLATLGGQTALNAAIQLDRLGILEKYGVELIGADIDAIERGEDRQKFKDIVTTIGGESARSRVCHNMEEVHETVAELGLPVVVRPSFTMGGLGSGLAYNTEDLERIAGGGLAASPEANVLIEESILGWKEFELELMRDTADNVVVICSIENVDALGVHTGDSVTVAPALTLTDREFQKMRDQGIAIIREVGVDTGGCNIQFAINPVDGRIITIEMNPRVSRSSALASKATGFPIAKMAAKLAIGYTLDEITNDITGETPAAFEPTIDYVVVKAPRFAFEKFVGADDTLTTTMKSVGEVMSLGRNYIAALNKALRSLETKQQGFWTKPDEFFAGERATDKAAVLEDLKRPTEGRLYDVELAMRLGASVEELYEASSIDPWFLAELEALVQFRQKLVDAPFLNEDLLREAKFMGLSDLQIAALRPEFAGEDGVRTLRLSLGIRPVFKTVDTCAAEFEAKTPYHYSAYELDPAAESEVAPQTEREKVLILGSGPNRIGQGIEFDYSCVHAALELSRVGYETVMVNCNPETVSTDYDTADRLYFEPLTFEDVMEVYHAEAQSGTVAGVIVQLGGQTPLGLADRLKKAGVPVIGTSPEAIDMAEDRGEFGALLNREQLPAPAFGTATSFEEARTVADEISYPVLVRPSYVLGGRGMEIVYDEASLEDYINRATELSSDHPVLVDRFLDNAIEIDVDALCDGDEVYLAGVMEHIEEAGIHSGDSACALPPMTLGAQDIEKVREATKKLALGIGVQGLMNVQYALKDDILYVIEANPRASRTVPFVSKATGVNLAKAASRIAVGATIKDLQDEGMIPTEYDGGSLPLDAPIAVKEAVLPFNRFRRPDGKTLDTLLSPEMKSTGEVMGLANNFGAAYAKAEAGAFGALPTEGTVFVTVANRDKRTLILPIQRLALMGYKILATEGTAGMLRRNGIECEVVLKASDIREGVEGKSIVDRIREGEVDLILNTPAGSAGARHDGYDIRAAAVTVGVPLITTVQGVTAAVQGIEALREGVVSVRALQELDHAVKA

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
BA000036
EMBL· GenBank· DDBJ
BAB99002.1
EMBL· GenBank· DDBJ
Genomic DNA
BX927152
EMBL· GenBank· DDBJ
CAF21618.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

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