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Helicobacter pylori Xanthine-Guanine-Hypoxanthine Phosphoribosyltransferase-A Putative Target for Drug Discovery against Gastrointestinal Tract Infections
DT. Keough, SJ. Wun, O. Baszczyňski, WS. Eng, P. Špaček, S. Panjikar, L. Naesens, R. Pohl, D. Rejman, D. Hocková, RL. Ferrero, LW. Guddat
Language English Country United States
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Anti-Bacterial Agents chemistry metabolism pharmacology therapeutic use MeSH
- Bacterial Proteins chemistry metabolism MeSH
- Gastrointestinal Diseases drug therapy microbiology pathology MeSH
- Helicobacter pylori drug effects enzymology MeSH
- Hypoxanthine Phosphoribosyltransferase chemistry metabolism MeSH
- Hypoxanthines chemistry metabolism pharmacology therapeutic use MeSH
- Helicobacter Infections drug therapy pathology MeSH
- Kinetics MeSH
- Crystallography, X-Ray MeSH
- Humans MeSH
- Organophosphonates chemistry metabolism pharmacology therapeutic use MeSH
- Pentosyltransferases chemistry metabolism MeSH
- Prodrugs chemistry metabolism pharmacology therapeutic use MeSH
- Amino Acid Sequence MeSH
- Sequence Alignment MeSH
- Molecular Dynamics Simulation MeSH
- Binding Sites MeSH
- Structure-Activity Relationship MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
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.
Australian Synchrotron ANSTO 800 Blackburn Road Clayton 3168 Victoria Australia
Biomedicine Discovery Institute Department of Microbiology Monash University Clayton 3800 Australia
Department of Biochemistry and Molecular Biology Monash University Clayton 3800 Australia
Department of Molecular and Translational Sciences Monash University Clayton 3800 Australia
Hudson Institute of Medical Research Clayton 3800 Victoria Australia
Katholieke Universiteit Leuven Rega Institute for Medical Research Leuven 3000 Belgium
References provided by Crossref.org
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- $a 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.
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