Enables thymidylate kinase activity and uridylate kinase activity. Involved in dTDP biosynthetic process and dUDP biosynthetic process. Predicted to be located in nucleoplasm. Predicted to be active in mitochondrion. Orthologous to human CMPK2 (cytidine/uridine monophosphate kinase 2). [provided by Alliance of Genome Resources, Apr 2022]