A0A3G6T329 · A0A3G6T329_9FLAO

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.

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 site250NAD+ (UniProtKB | ChEBI)
Binding site250-252NAD+ (UniProtKB | ChEBI)
Binding site300-302NAD+ (UniProtKB | ChEBI)
Binding site302K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site304K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site305IMP (UniProtKB | ChEBI)
Active site307Thioimidate intermediate
Binding site307K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site340-342IMP (UniProtKB | ChEBI)
Binding site363-364IMP (UniProtKB | ChEBI)
Binding site387-391IMP (UniProtKB | ChEBI)
Active site403Proton acceptor
Binding site415IMP (UniProtKB | ChEBI)
Binding site469K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site470K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site471K+ (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
      EG339_03660

Organism names

  • Taxonomic identifier
  • Strain
    • G0229
  • Taxonomic lineage
    Bacteria > Bacteroidota > Flavobacteriia > Flavobacteriales > Weeksellaceae > Chryseobacterium group > Chryseobacterium

Accessions

  • Primary accession
    A0A3G6T329

Proteomes

Interaction

Subunit

Homotetramer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain96-152CBS
Domain156-213CBS

Sequence similarities

Belongs to the IMPDH/GMPR family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    486
  • Mass (Da)
    51,921
  • Last updated
    2019-02-13 v1
  • Checksum
    356CDD4B3545DA55
MSIHNKIVETAITFDDVLLVPSYSEVLPNQVSLKSRLTDKITLNVPIVSAAMDTVTEGDLAIALARVGGLGFIHKNMTIAEQAAQVNRVKRSENGMISDPVTLSKDHTLGQAKEMMAKFKISGLPVVDADNVLIGIITNRDVKYQENLDMKVEEIMTKENLITSDKDTNLEKAKEILLKNRVEKLPIVDKDNKLVGLITIKDIDNQLEYPNANKDQNGRLIVGAGVGVGEDTLDRIEALVQAGVDIVAIDSAHGHSKGVLDKISEIRKAYPNLDIVGGNIVTAEAAADLIKAGANVLKVGVGPGSICTTRVVAGVGVPQLSAIYNVYEYAKSQNVAVIADGGIKLSGDIVKAIASGAGAVMLGSLLAGTDEAPGEEIIFQGRKFKSYQGMGSLSAMKRGGKERYFQSEAKKFVPEGIEGRVPHKGKLEDVIFQLTGGLRAGMGYCGAKDIEALQKDSKLVMITGSGLKESHPHDVIITQEAPNYSL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CP033932
EMBL· GenBank· DDBJ
AZB23782.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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