Synthesis of 2'-Deoxyuridine 5'-(α,β-Imido)triphosphate: A Substrate Analogue and Potent Inhibitor of dUTPase

Research output: Contribution to journalArticle

Abstract

The dUDP analogue, 2'-deoxyuridine 5'-(α,β-imido)diphosphate (dUPNP) was synthesized. The corresponding triphosphate analogue (dUPNPP) was prepared by enzymic phosphorylation of dUPNP using the enzyme pyruvate kinase and phosphoenolpyruvate as the phosphate donor. This method was successful in phosphorylating the imidodiphosphate analogue of 2'-deoxythymidine (dTPNP) to 2'-deoxythymidine 5'-(α,β-imido)triphosphate (dTPNPP), in contradiction to a previous report. The properties of dUPNPP have been tested using the enzyme dUTPase from Escherichia coli. This enzyme, having a crucial role in nucleotide metabolism, is strictly specific for its substrate (dUTP) and catalyzes the hydrolysis of the α,β-bridge, resulting in dUMP and pyrophosphate. Replacement of the α,β-bridging oxygen in dUTP with an imido group resulted in a nonhydrolyzable substrate analogue and a potent competitive inhibitor of dUTPase (Ki=5μM). The analogue prepared (dUPNPP) may be utilized in crystallographic studies of the active site of dUTPase to provide knowledge about specific interactions involved in substrate binding and as a parental compound in design of dUTPase inhibition for medical purposes.

Details

Authors
  • Tina Persson
  • Gunilla Larsson
  • Per-Olof Nyman
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Biological Sciences
  • Organic Chemistry
Original languageEnglish
Pages (from-to)553-556
JournalBioorganic & Medicinal Chemistry
Volume4
Issue number4
Publication statusPublished - 1996
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Organic chemistry (S/LTH) (011001240), Biochemistry and Structural Biology (S) (000006142)