CMP kinaseUMP-CMP kinase is an enzyme that in humans is encoded by the CMPK1 gene.FunctionUridine monophosphate /cytidine monophosphate kinase catalyzes the phosphoryl transfer from ATP to UMP, CMP, and deoxy-CMP, resulting in the formation of ADP and the corresponding nucleoside diphosphate. These nucleoside diphosphates are required for cellular nucleic acid synthesis.