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Aminoacid utilization by Helicobacter pylori
1School of Biochemistry and Molecular Genetics, University of New South Wales, Sydney, Australia.
The International Journal of Biochemistry & Cell Biology
|October 1, 1995
Summary
Helicobacter pylori utilizes amino acids for growth, accumulating byproducts like acetate and formate. This suggests fermentative pathways similar to anaerobes for survival.
Area of Science:
- Microbiology
- Biochemistry
Background:
- Helicobacter pylori is a significant human pathogen.
- Understanding its metabolic capabilities is crucial for developing targeted interventions.
Purpose of the Study:
- To investigate the utilization of amino acids for growth in Helicobacter pylori.
- To identify the metabolic byproducts generated from amino acid catabolism.
Main Methods:
- Utilized nuclear magnetic resonance (NMR) spectroscopy and amino acid analysis.
- Cultured laboratory-adapted and wild-type H. pylori strains in defined media without carbohydrates.
Main Results:
- H. pylori exhibited growth with doubling times of approximately 11.5 hours.
- Rapid amino acid consumption (80-250 microM/hr) was observed, producing acetate, formate, and succinate.
- Bacterial cells and lysates converted specific amino acids into acetate, formate, succinate, and lactate.
Conclusions:
- Helicobacter pylori can effectively use amino acids as primary nutrients for survival.
- Metabolic pathways involved in amino acid utilization show similarities to those found in anaerobic fermentation.