K6GV62 · K6GV62_9BACT

Function

function

Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth.

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

K+ (UniProtKB | Rhea| CHEBI:29103 )

Activity regulation

Mycophenolic acid (MPA) is a non-competitive inhibitor that prevents formation of the closed enzyme conformation by binding to the same site as the amobile flap. In contrast, mizoribine monophosphate (MZP) is a competitive inhibitor that induces the closed conformation. MPA is a potent inhibitor of mammalian IMPDHs but a poor inhibitor of the bacterial enzymes. MZP is a more potent inhibitor of bacterial IMPDH.

Pathway

Purine metabolism; XMP biosynthesis via de novo pathway; XMP from IMP: step 1/1.

Features

Showing features for binding site, active site.

Type
IDPosition(s)Description
Binding site246NAD+ (UniProtKB | ChEBI)
Binding site246-248NAD+ (UniProtKB | ChEBI)
Binding site296-298NAD+ (UniProtKB | ChEBI)
Binding site298K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site300K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site301IMP (UniProtKB | ChEBI)
Active site303Thioimidate intermediate
Binding site303K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site336-338IMP (UniProtKB | ChEBI)
Binding site359-360IMP (UniProtKB | ChEBI)
Binding site383-387IMP (UniProtKB | ChEBI)
Active site399Proton acceptor
Binding site411IMP (UniProtKB | ChEBI)
Binding site465K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site466K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site467K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners

GO annotations

AspectTerm
Molecular FunctionIMP dehydrogenase activity
Molecular Functionmetal ion binding
Molecular Functionnucleotide binding
Biological ProcessGMP biosynthetic process
Biological ProcessGTP biosynthetic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Inosine-5'-monophosphate dehydrogenase
  • EC number
  • Short names
    IMP dehydrogenase
    ; IMPD
    ; IMPDH

Gene names

    • Name
      guaB
    • ORF names
      B193_0427

Organism names

Accessions

  • Primary accession
    K6GV62

Proteomes

Interaction

Subunit

Homotetramer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain93-148CBS
Domain152-212CBS

Sequence similarities

Belongs to the IMPDH/GMPR family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    485
  • Mass (Da)
    51,803
  • Last updated
    2013-01-09 v1
  • Checksum
    926B98FDDC605C4D
MEKVIDFGLTFDDVLLVPAYSEVTPDQADVSSWLTPDIKLNIPLVSAAMDTVTESRMAIQLARSGGVGVVHKNMTIAQQRLEVEKVKKSESGMIISPITVPPAMTVEQALTVMSEYSISGLPVVDGDTLVGIVTNRDVRFVKDSVTTVGQVMTSENLVTVPVGTTLEEAKHHLHANRIEKLLVVDDNNKLRGLITIKDIEKIRKYPNSCKDSLGRLRVGAAIGVGGDRGERVQALLDAGADFLVLDSAHGHSKNILESIRAIKAEHPGCQLVAGNIGTYEGAKALIAAGADAVKVGIGPGSICTTRVVAGVGVPQVTAIMEASRACREAGKRIIADGGVKFSGDIVKALAAGGDTVMMGGLFAGTEESPGETVLYQGRTYKIYRGMGSIDAMREGSSDRYFQEKTKKLVPEGIVGRVPFKGPVTDSIYQLVGGLRSGMGYCGCNTIEELQQKARFVRISPAGLRESHVHDVIITKEAPNYRVETY

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
ALAO01000044
EMBL· GenBank· DDBJ
EKO40826.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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