Biochemistry p. 1703 - 1707 (2015)
Update date:2022-08-26
Topics:
Forget, Stephanie M.
Smithen, Deborah A.
Jee, Alison
Jakeman, David L.
Pyrimidine polyphosphates were first detected in cells 5 decades ago; however, their biological significance remains only partially resolved. Such nucleoside polyphosphates are believed to be produced nonspecifically by promiscuous enzymes. Herein, synthetically prepared deoxythymidine 5′-tetraphosphate (p4dT) was evaluated with a thymidylyltransferase, Cps2L. We have identified p4dT as a substrate for Cps2L and evaluated the reaction pathway by analysis of products using high-performance liquid chromatography, liquid chromatography and tandem mass spectrometry, and 31P nuclear magnetic resonance spectroscopy. Product analysis confirmed production of dTDP-Glc and triphosphate (P3) and showed no trace of dTTP-Glc and PPi, which could arise from alternative pathways for the reaction mechanism.
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