Relationship between stress response towards bile salts, acid and heat treatment in Enterococcus faecalis

Abstract Stress tolerance and cross-protection in Enterococcus faecalis ATCC19433 were examined after exposure to bile salts, acid or heat shock. Bile salts and heat adapted cells demonstrated induced homologous tolerance and cross-resistance. No cross-protection of heat adapted cells against acid s...

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Published in:FEMS microbiology letters 1996-04, Vol.138 (1), p.49-54
Main Authors: Flahaut, Sigrid, Hartke, Axel, Giard, Jean-christophe, Benachour, Abdellah, Boutibonnes, Philippe, Auffray, Yanick
Format: Article
Language:English
Subjects:
Action of physical and chemical agents on bacteria
Bacteriology
Bile
Bile salts
Biochemistry, Molecular Biology
Biological and medical sciences
Cross-protection
Cross-resistance
DnaK protein
Enterococcus faecalis
Environmental stress
Fundamental and applied biological sciences. Psychology
Heat shock
Heat shock proteins
Heat treatment
Heat treatments
Homology
Life Sciences
Microbiology
Polypeptides
Pretreatment
Proteins
Salts
Stress protein
Stress proteins
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Summary:Abstract Stress tolerance and cross-protection in Enterococcus faecalis ATCC19433 were examined after exposure to bile salts, acid or heat shock. Bile salts and heat adapted cells demonstrated induced homologous tolerance and cross-resistance. No cross-protection of heat adapted cells against acid stress is observed and pretreatment with bile salts even sensitized the cells to this challenge. Whole-cell protein extract analysis revealed that each treatment induced a battery of stress proteins. Some of these polypeptides are induced by more than one treatment. The greatest overlap is observed between bile salts and heat treatments. Eighteen stress proteins, including DnaK and GroEL, are common between these stresses.
ISSN:0378-1097
1574-6968
DOI:10.1111/j.1574-6968.1996.tb08133.x