Protein
Phosphoribosylformylglycinamidine synthase subunit PurQ
Organism
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
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.
Sequence
MDREEIKVAVLRMEGTNCEDETVKAFRSLGVEAEAVHIKQFYSDMIRFEEQRSVFDYQCLVFPGGFSAGDYIRAGAIFSARVKSVLRKDIEEFIKMGYPILGICNGFQVLVELGALPGFDEDKPLAEKPEMALAMNDSSRFECRPTLLKKESEKCIFVKNLKKDVVMFPVAHAEGKVVFPSGKEDEYLERLTSNDQIVFRYVDEKGDYAGYPWNPNGSFYNIAGICNATHTVFGLMPHPERAFFGYQVGRREGYGDGYCIFRSVVDYLEKL