Helicobacter pylori Xanthine-Guanine-Hypoxanthine Phosphoribosyltransferase - A Putative Target for Drug Discovery against Gastrointestinal Tract Infections

Dianne T. Keough, Shun Jie Wun, Ondřej Baszczyňski, Wai Soon Eng, Petr Špaček, Santosh Panjikar, Lieve Naesens, Radek Pohl, Dominik Rejman, Dana Hocková, Richard L. Ferrero, Luke W. Guddat

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3 Citations (Scopus)


Helicobacter pylori (Hp) is a human pathogen that lives in the gastric mucosa of approximately 50% of the world's population causing gastritis, peptic ulcers, and gastric cancer. An increase in resistance to current drugs has sparked the search for new Hp drug targets and therapeutics. One target is the disruption of nucleic acid production, which can be achieved by impeding the synthesis of 6-oxopurine nucleoside monophosphates, the precursors of DNA and RNA. These metabolites are synthesized by Hp xanthine-guanine-hypoxanthine phosphoribosyltransferase (XGHPRT). Here, nucleoside phosphonates have been evaluated, which inhibit the activity of this enzyme with Ki values as low as 200 nM. The prodrugs of these compounds arrest the growth of Hp at a concentration of 50 μM in cell-based assays. The kinetic properties of HpXGHPRT have been determined together with its X-ray crystal structure in the absence and presence of 9-[(N-3-phosphonopropyl)-aminomethyl-9-deazahypoxanthine, providing a basis for new antibiotic development.

Original languageEnglish
Pages (from-to)5710-5729
Number of pages20
JournalJournal of Medicinal Chemistry
Issue number9
Publication statusPublished - 13 May 2021

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