This is the N-terminal domain found in Formylglycinamide ribonucleotide amidotransferase (FGAR-AT), also known as Phosphoribosylformylglycinamidine synthase (EC:6.3.5.3), PurL and formylglycinamidine ribonucleotide (FGAM) synthase. This enzyme catalyzes the ATP-dependent conversion of formylglycinamide ribonucleotide and glutamine to formylglycinamidine ribonucleotide, ADP, Pi, and glutamate in the fourth step of the purine biosynthetic pathway [3].

1: Domain organization of Salmonella typhimurium formylglycinamide ribonucleotide amidotransferase revealed by X-ray crystallography. Anand R, Hoskins AA, Stubbe J, Ealick SE; Biochemistry. 2004;43:10328-10342. PMID:15301531

2: Formylglycinamide ribonucleotide amidotransferase from Salmonella typhimurium: role of ATP complexation and the glutaminase domain in catalytic coupling. Tanwar AS, Morar M, Panjikar S, Anand R; Acta Crystallogr D Biol Crystallogr. 2012;68:627-636. PMID:22683785

3: Importance of hydrophobic cavities in allosteric regulation of formylglycinamide synthetase: insight from xenon trapping and statistical coupling analysis. Tanwar AS, Goyal VD, Choudhary D, Panjikar S, Anand R; PLoS One. 2013;8:e77781. PMID:24223728