A0A3A5HLM6 · A0A3A5HLM6_9EURY

  • 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 site248NAD+ (UniProtKB | ChEBI)
Binding site248-250NAD+ (UniProtKB | ChEBI)
Binding site297-299NAD+ (UniProtKB | ChEBI)
Binding site299K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site301K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site302IMP (UniProtKB | ChEBI)
Active site304Thioimidate intermediate
Binding site304K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain
Binding site337-339IMP (UniProtKB | ChEBI)
Binding site360-361IMP (UniProtKB | ChEBI)
Binding site384-388IMP (UniProtKB | ChEBI)
Active site403Proton acceptor
Binding site420IMP (UniProtKB | ChEBI)
Binding site474K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site475K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners
Binding site476K+ (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
      CIT03_05220

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Archaea > Euryarchaeota > Methanomada group > Methanobacteria > Methanobacteriales > Methanobacteriaceae > Methanobacterium

Accessions

  • Primary accession
    A0A3A5HLM6

Proteomes

Interaction

Subunit

Homotetramer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain97-154CBS
Domain158-213CBS

Sequence similarities

Belongs to the IMPDH/GMPR family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    493
  • Mass (Da)
    53,118
  • Last updated
    2018-12-05 v1
  • Checksum
    0658044F4841A34B
MYSKKLKEAPVGYTFDDFLILPGASEVEPKDVSTKSMVSRNFELNIPLISSAMDTVTESDMAITLAQEGGMGVIHRNMTIKEQVKQVKQVKKSGDLAIHDVITINPESSLKEAQSIMDQEMVSGMPVVEDEVVIGIISRRDIKPIINSDSHKKVREIMTSDVVTVDESITPGEALDIAYENKVERLPVVREGKIMGIVTIKDILERKKHPNACRDKKGRFIVAAATGPFDLDRAIALDKSGVDIIAIDTAHGHNMNIVKYVKTMKKNIEADLIVGNIATREAAEDLLSQEVDGLKVGIGPGSMCTTRIISGIGVPQLTAVSEVAEVASEYGVPVIADGGIRYSGDIAKAIAVGADVIMMGNLLAGTYEAPGEVVVMNGRKYKQYRGMGSLGAMTGGTGAGTDRYFQEVKGPMKHSKLVPEGVEGVVPYRGSVSEMVFQLVGGLKASMGYCGAQDIKSMQKKAKLVRITSSGIKESHPHDLLITNESPNYPTLE

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
NPZC01000008
EMBL· GenBank· DDBJ
RJS48934.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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