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  Domain Name: GARS_A
Phosphoribosylglycinamide synthetase, ATP-grasp (A) domain. Phosphoribosylglycinamide synthetase catalyzes the second step in the de novo biosynthesis of purine. The reaction catalyzed by Phosphoribosylglycinamide synthetase is the ATP- dependent addition of 5-phosphoribosylamine to glycine to form 5'phosphoribosylglycinamide. This domain is related to the ATP-grasp domain of biotin carboxylase/carbamoyl phosphate synthetase (see pfam02786).