Reaction: ATP + UMP = ADP + UDP
Other name(s): uridylate kinase; UMPK; uridine monophosphate kinase; PyrH; UMP-kinase; SmbA
Systematic name: ATP:UMP phosphotransferase
Comments: This enzyme is strictly specific for UMP as substrate and is used by prokaryotes in the de novo synthesis of pyrimidines, in contrast to eukaryotes, which use the dual-specificity enzyme UMP/CMP kinase (EC 22.214.171.124) for the same purpose . This enzyme is the subject of feedback regulation, being inhibited by UTP and activated by GTP .
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9036-23-1
1. Serina, L., Blondin, C., Krin, E., Sismeiro, O., Danchin, A., Sakamoto, H., Gilles, A.M. and B̢rzu O. Escherichia coli UMP-kinase, a member of the aspartokinase family, is a hexamer regulated by guanine nucleotides and UTP. Biochemistry 34 (1995) 5066-5074. [PMID: 7711027]
2. Marco-Marin, C., Gil-Ortiz, F. and Rubio, V. The crystal structure of Pyrococcus furiosus UMP kinase provides insight into catalysis and regulation in microbial pyrimidine nucleotide biosynthesis. J. Mol. Biol. 352 (2005) 438-454. [PMID: 16095620]