A0A1S1LJQ2 · A0A1S1LJQ2_MYCCH

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.

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

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 site730ATP 2 (UniProtKB | ChEBI)
Binding site769ATP 2 (UniProtKB | ChEBI)
Binding site771ATP 2 (UniProtKB | ChEBI)
Binding site776ATP 2 (UniProtKB | ChEBI)
Binding site801ATP 2 (UniProtKB | ChEBI)
Binding site802ATP 2 (UniProtKB | ChEBI)
Binding site803ATP 2 (UniProtKB | ChEBI)
Binding site804ATP 2 (UniProtKB | ChEBI)
Binding site844ATP 2 (UniProtKB | ChEBI)
Binding site844Mg2+ 3 (UniProtKB | ChEBI)
Binding site844Mn2+ 3 (UniProtKB | ChEBI)
Binding site856ATP 2 (UniProtKB | ChEBI)
Binding site856Mg2+ 3 (UniProtKB | ChEBI)
Binding site856Mg2+ 4 (UniProtKB | ChEBI)
Binding site856Mn2+ 3 (UniProtKB | ChEBI)
Binding site856Mn2+ 4 (UniProtKB | ChEBI)
Binding site858Mg2+ 4 (UniProtKB | ChEBI)
Binding site858Mn2+ 4 (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentcytoplasm
Molecular FunctionATP binding
Molecular Functioncarbamoyl-phosphate synthase (glutamine-hydrolyzing) activity
Molecular Functionmetal ion binding
Biological Process'de novo' UMP biosynthetic process
Biological Processglutamine metabolic process
Biological ProcessL-arginine biosynthetic 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
    • ORF names
      BKG82_15495
      , BKG84_22225

Organism names

Accessions

  • Primary accession
    A0A1S1LJQ2

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 region, domain.

Type
IDPosition(s)Description
Region1-407Carboxyphosphate synthetic domain
Domain138-333ATP-grasp
Domain694-885ATP-grasp
Domain967-1112MGS-like
Region967-1112Allosteric 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

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    1,112
  • Mass (Da)
    119,217
  • Last updated
    2017-04-12 v1
  • MD5 Checksum
    ADD9CBC8BFC7E3C7FF0BD49DD5D682E7
MPRRTDLNHILVIGSGPIVIGQACEFDYSGTQACRVLRSEGLQVSLVNSNPATIMTDPEYADNTYVEPITAEFVEKVLAAQAEKGNKIDALLPTLGGQTALNTAVALYENGALDRYNVELIGANFEAIQRGEDRQRFKDIVAKVGGESAKSRVCFTMDEVRDTVADLGLPVVVRPSFTMGGLGSGMAYTPEDVERMAGEGLSASPSANVLIEESIYGWKEFELELMRDSRDNVVVVCSIENVDPMGVHTGDSVTVAPAMTLTDREYQKMRDLGIAILREVGVDTGGCNIQFAINPRDGRLIVIEMNPRVSRSSALASKATGFPIAKIAAKLAIGYTLDEIVNDITKETPACFEPTLDYVVVKAPRFAFEKFPGADATLTTTMKSVGEAMSLGRNFAEALGKVMRSLETSAAGFWTDNASPIEDLDTFLQELRVPRDGRLYGIEHALGAGVSVEQVAEITGVDPWFVEEIAQIHQLGTELREAPILDEELLRRAKHYGLSDRQIAALRPELAGEDGVRSLRHRMGIRPVYKTVDTCAAEFEAKTPYHYSSYELDPAAESEVAPQTERPKVLILGSGPNRIGQGIEFDYSCVHAATTLSQAGFETIMVNCNPETVSTDYDTADRLYFEPLTFEDVLEVFHAENESGRGGPGVVGVIVQLGGQTPLGLAKRLADAGVPVVGTSPAAIDRAEDRGVFGDLLVSAGLPAPRFGTATTFEQARQIASDIGYPVLVRPSYVLGGRGMEIVYDEDTLHGYITRATQLSPEHPVLVDRFLEDAIEIDVDALCDGTEVYLGGVMEHIEEAGIHSGDSACALPPVTLGRSDIEKVRNATEAIAHGIGVVGLLNVQYALKDDVLYVLEANPRASRTVPFVSKATAVPLAKACSRIMLGATIAGLREEGLLPADGDGATLPPGAPVAVKEAVLPFHRFRKADGSQVDSLLGPEMKSTGEVMGIDADFGSAFAKSQTAAYGSLPKEGTIFVSVANRDKRSLVFPVKRLADLGFKVLATEGTAEMLRRNGIPCEEVRKHYQGAEDGLPPRSSVDVIKAGEVAMVINTPYGNSGPRVDGYEIRSAAVSMNIPCITTVQGASAAVQGIEAGIRGDIGVRSLQELHAGLR

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MLIQ01000016
EMBL· GenBank· DDBJ
OHU56640.1
EMBL· GenBank· DDBJ
Genomic DNA
MLIS01000002
EMBL· GenBank· DDBJ
OHU76849.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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