| Type: | Domain | Name: | Phosphoribosylglycinamide synthetase, ATP-grasp (A) domain |
| Description: | Phosphoribosylglycinamide synthetase () (GARS) (phosphoribosylamine glycine ligase) [] catalyses the second step in the de novobiosynthesis of purine. The reaction catalysed by phosphoribosylglycinamide synthetase is the ATP-dependent addition of 5-phosphoribosylamine to glycine to form 5'phosphoribosylglycinamide: ATP + 5-phosphoribosylamine + glycine = ADP + Pi+ 5'-phosphoribosylglycinamide In bacteria, GARS is a monofunctional enzyme (encoded by the purD gene). In yeast, GARS is part of a bifunctional enzyme (encoded by the ADE5,7 gene) in conjunction with phosphoribosylformylglycinamidine cyclo-ligase (AIRS) []. In higher eukaryotes, GARS is part of a trifunctional enzyme in conjunction with AIRS and with phosphoribosylglycinamide formyltransferase (GART), forming GARS-AIRS-GART [].This entry represents the A-domain of the enzyme, and is related to the ATP-grasp domain of biotin carboxylase/carbamoyl phosphate synthetase. | Short Name: | PRibGlycinamid_synth_ATP-grasp |
