Uridine-5’-monophosphate (UMP) is a ribonucleotide.1It is formedviadecarboxylation of orotidine-5’-monophosphate (5’-OMP) by OMP decarboxylase. UMP is further phosphorylated by UMP-CMPkinase to form UDP and UTP during nucleic acid biosynthesis. Formulations containing UMP have been used as dietary supplements. 1.Berg, J.M., Tymoczko, J.L., and Stryer, L.Nucleotide BiosynthesisBiochemistry(2002)
Cytarabine 5′-monophosphate (ara-CMP), an active metabolite of the nucleoside analog cytarabine formed by deoxycytidine kinase, is incorporated into DNA by DNA polymerase α, significantly slowing DNA synthesis. It inhibits nuclear and mitochondrial DNA replication in S. cerevisiae at 15 mM and improves survival in an L1210 murine leukemia model at 3.5-75.1 mg kg.