A0A1A8WGC9 · A0A1A8WGC9_PLAOA
- ProteinInosine-5'-monophosphate dehydrogenase
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids496 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
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.
Catalytic activity
- IMP + NAD+ + H2O = XMP + NADH + H+
Cofactor
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 | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 243-245 | NAD+ (UniProtKB | ChEBI) | |||
Binding site | 293-295 | NAD+ (UniProtKB | ChEBI) | |||
Binding site | 295 | K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain | |||
Binding site | 297 | K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain | |||
Binding site | 298 | IMP (UniProtKB | ChEBI) | |||
Active site | 300 | Thioimidate intermediate | |||
Binding site | 300 | K+ (UniProtKB | ChEBI); ligand shared between two tetrameric partners; in other chain | |||
Binding site | 333-335 | IMP (UniProtKB | ChEBI) | |||
Binding site | 356-357 | IMP (UniProtKB | ChEBI) | |||
Binding site | 380-384 | IMP (UniProtKB | ChEBI) | |||
Active site | 399 | Proton acceptor | |||
Binding site | 421 | IMP (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytoplasm | |
Molecular Function | IMP dehydrogenase activity | |
Molecular Function | metal ion binding | |
Molecular Function | nucleotide binding | |
Biological Process | GMP biosynthetic process | |
Biological Process | GTP biosynthetic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameInosine-5'-monophosphate dehydrogenase
- EC number
- Short namesIMP dehydrogenase ; IMPD ; IMPDH
Gene names
Organism names
- Organism
- Taxonomic lineageEukaryota > Sar > Alveolata > Apicomplexa > Aconoidasida > Haemosporida > Plasmodiidae > Plasmodium > Plasmodium (Plasmodium)
Accessions
- Primary accessionA0A1A8WGC9
Proteomes
Subcellular Location
Interaction
Subunit
Homotetramer.
Structure
Sequence
- Sequence statusComplete
- Length496
- Mass (Da)54,871
- Last updated2016-10-05 v1
- MD5 ChecksumDBB2C7195B5AE174E0D5340A4E01BEFD
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
FLQV01000240 EMBL· GenBank· DDBJ | SBS85786.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
FLQU01001204 EMBL· GenBank· DDBJ | SBS92017.1 EMBL· GenBank· DDBJ | Genomic DNA |