ISSN:
1432-072X
Keywords:
Key words Purine biosynthesis
;
Adenine
;
Purine
;
analogues
;
Adenine deaminase
;
1H-NMR spectroscopy
;
Helicobacter pylori
;
Microaerophily
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The requirements for purine nucleotide synthesis, the effects of purine analogues, and the metabolism of adenine in the bacterium Helicobacter pylori were investigated employing cell culture techniques and one-dimensional NMR spectroscopy. Bacterial cells grew and proliferated in media lacking preformed purines, indicating that H. pylori can synthesize purine nucleotides de novo to meet its requirements. Blocking of this pathway in the absence of sufficient preformed purines for salvage nucleotide synthesis led to cell death. Analogues of purine nucleobases and nucleosides taken up by the cells were cytotoxic, suggesting that salvage routes could be exploited for therapy. Adenine or hypoxanthine were able to substitute for catalase in supporting cell growth and proliferation, suggesting a role for these bases in maintaining the microaerophilic conditions essentially required by the bacterium.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002030050521
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