>sp|A3CTR9|HIS4_METMJ 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase OS=Methanoculleus marisnigri GN=hisA MEIYPAVDILDGRCVQLVQGRPEAATVYGDPAAWAHRWLDEGADGLHVVNLDGAFGRARK NADLIRAFTRETETFTELGGGIRSVEDAAGWLDAGVDRVIVSTQAVREPEMIRTLAEEFG GERVMAGIDARAGEVMIEGWERPAGSYLSWAERFESLGAGSLLYTNVDVEGLQQGIAIEP VTELLARVKVPVVVSGGISSPGDVAALRDAGAAGAVLGSALYAGKVRLPEAMEAAHANE