purM AIR synthase AIRS Phosphoribosyl-aminoimidazole synthetase MVTYKDAGVDISHEDKVIKALVSQITFKRSDIKPAELGLHYAGAVEFGDYYLVLSTDGVGSKMIVAEMANKFDTVGIDMIAMNVNDAICIGAEPIALVDYLAVGHITEEIAEQIGKGLNEGAKEANINIVGGETATLPDMIKGIDLAGTVLAIVKKDEIITGKDVKAGDVIVGLRSSGIHSNGLSLARKVFFDIAKLDINDKLSYGKTVAEELLTPTRIYVKPVLEMIRDKDIEVKGLAHITGGSFRKLKRLNDKVTYYIDNLPEPLPIFKEIQRLGNVPDEEMFRTFNMGIGFCVIVDEEDANKVIKIANKYNIPAQVIGRVVDSLEVNGNKIVGKAVVKYNDKHIILE MJ0203 Phosphoribosylformylglycinamidine cyclo-ligase 350 PUR5_METJA