A0A853XD53 · A0A853XD53_9BACI

  • Protein
    Inosine-5'-monophosphate dehydrogenase
  • Gene
    guaB
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

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.

TypeIDPosition(s)Description
Binding site251NAD+ (UniProtKB | ChEBI)
Binding site251-253NAD+ (UniProtKB | ChEBI)
Binding site301-303NAD+ (UniProtKB | ChEBI)
Binding site303K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site305K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site306IMP (UniProtKB | ChEBI)
Active site308Thioimidate intermediate
Binding site308K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site341-343IMP (UniProtKB | ChEBI)
Binding site364-365IMP (UniProtKB | ChEBI)
Binding site388-392IMP (UniProtKB | ChEBI)
Active site404Proton acceptor
Binding site416IMP (UniProtKB | ChEBI)
Binding site470K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site471K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site472K+ (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

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
      BAU24_00645

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • L27
  • Taxonomic lineage
    Bacteria > Bacillota > Bacilli > Bacillales > Bacillaceae > Bacillus

Accessions

  • Primary accession
    A0A853XD53

Proteomes

Interaction

Subunit

Homotetramer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain95-153CBS
Domain157-215CBS

Sequence similarities

Belongs to the IMPDH/GMPR family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    487
  • Mass (Da)
    52,388
  • Last updated
    2021-09-29 v1
  • Checksum
    72B73F450D4297FF
MWESKFVKEGLTFDDVLLVPAKSDVLPREVSVKTVLSESLQLNIPLISAGMDTVTEADMAIAMARQGGLGIIHKNMSIEQQAEQVDKVKRSESGVISDPFFLTPEHQVYDAEHLMGKYRISGVPVVNNLDERKLVGIITNRDMRFIQDYSIKISDVMTKEQLITAPVGTTLDEAEKILQKYKIEKLPLVDNNGVLQGLITIKDIEKVIEFPNSAKDKQGRLLVGAAVGVTADAMTRIDALVKASVDAIVLDTAHGHSQGVIDKVKEVRAKYPSLNIIAGNVATAEATKALIEAGANVVKVGIGPGSICTTRVVAGVGVPQLTAVYDCATEARKHGIPVIADGGIKYSGDMVKALAAGAHVVMLGSMFAGVAESPGETEIYQGRQFKVYRGMGSVGAMEKGSKDRYFQEGNKKLVPEGIEGRVPYKGPLADTVHQLVGGLRAGMGYCGAQDLEFLRENAQFVRMSGAGLLESHPHHVQITKEAPNYSL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MAOD01000034
EMBL· GenBank· DDBJ
OJD48198.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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