Q9HIM1 · PURQ_THEAC
- ProteinPhosphoribosylformylglycinamidine synthase subunit PurQ
- GenepurQ
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids257 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Part of the phosphoribosylformylglycinamidine synthase complex involved in the purines biosynthetic pathway. Catalyzes the ATP-dependent conversion of formylglycinamide ribonucleotide (FGAR) and glutamine to yield formylglycinamidine ribonucleotide (FGAM) and glutamate. The FGAM synthase complex is composed of three subunits. PurQ produces an ammonia molecule by converting glutamine to glutamate. PurL transfers the ammonia molecule to FGAR to form FGAM in an ATP-dependent manner. PurS interacts with PurQ and PurL and is thought to assist in the transfer of the ammonia molecule from PurQ to PurL.
Catalytic activity
- N2-formyl-N1-(5-phospho-beta-D-ribosyl)glycinamide + L-glutamine + ATP + H2O = 2-formamido-N1-(5-O-phospho-beta-D-ribosyl)acetamidine + L-glutamate + ADP + phosphate + H+
Pathway
Purine metabolism; IMP biosynthesis via de novo pathway; 5-amino-1-(5-phospho-D-ribosyl)imidazole from N2-formyl-N1-(5-phospho-D-ribosyl)glycinamide: step 1/2.
Features
Showing features for active site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Active site | 96 | Nucleophile | |||
Active site | 219 | ||||
Active site | 221 | ||||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytoplasm | |
Molecular Function | ATP binding | |
Molecular Function | glutaminase activity | |
Molecular Function | phosphoribosylformylglycinamidine synthase activity | |
Biological Process | 'de novo' IMP biosynthetic process | |
Biological Process | glutamine metabolic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended namePhosphoribosylformylglycinamidine synthase subunit PurQ
- EC number
- Short namesFGAM synthase
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageArchaea > Candidatus Thermoplasmatota > Thermoplasmata > Thermoplasmatales > Thermoplasmataceae > Thermoplasma
Accessions
- Primary accessionQ9HIM1
Proteomes
Subcellular Location
PTM/Processing
Features
Showing features for chain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Chain | PRO_0000100620 | 1-257 | Phosphoribosylformylglycinamidine synthase subunit PurQ | ||
Proteomic databases
Interaction
Subunit
Part of the FGAM synthase complex composed of 1 PurL, 1 PurQ and 2 PurS subunits.
Protein-protein interaction databases
Structure
Sequence
- Sequence statusComplete
- Length257
- Mass (Da)28,314
- Last updated2001-07-11 v2
- Checksum77251704BE914F1C
Sequence caution
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AL445067 EMBL· GenBank· DDBJ | CAC12439.1 EMBL· GenBank· DDBJ | Genomic DNA | Different initiation |