Catalyzes the ATP-dependent amination of UTP to CTP with either L-glutamine or ammonia as the source of nitrogen (By similarity). ctrA pyrG BSU37150 CTP synthetase CTP synthase UTP--ammonia ligase PYRG_BACSU 535 MTKYIFVTGGVVSSLGKGIVAASLGRLLKNRGLNVTIQKFDPYINVDPGTMSPYQHGEVFVTDDGAETDLDLGHYERFIDINLNKFSNVTTGKIYSTVLKKERRGDYLGGTVQVIPHITNELKDRVYRAGKETNADVVITEIGGTVGDIESLPFLEAIRQMKSDIGRENVMYIHCTLVPYIKAAGELKTKPTQHSVKELRSLGIQPNIIVVRTEMPISQDMKDKIALFCDIDTKAVIECEDADNLYSIPLELQKQGLDKLVCEHMKLACKEAEMSEWKELVNKVSNLSQTITIGLVGKYVELPDAYISVVESLRHAGYAFDTDVKVKWINAEEVTENNIAELTSGTDGIIVPGGFGDRGVEGKIVATKYARENNIPFLGICLGMQVASIEYARNVLGLKGAHSAEIDPSTQYPIIDLLPEQKDVEDLGGTLRLGLYPCKLEEGTKAFEVYQDEVVYERHRHRYEFNNEFRQQMEEQGFVFSGTSPDGRLVEIIELKDHPWFVASQFHPEFKSRPTRPQPLFKGFIGASVEAANQK