STRESS PROTEINS AND CROSS-PROTECTION BY HEAT-SHOCK AND SALT STRESS IN BACILLUS-SUBTILIS

Autor(en): VOLKER, U
MACH, H
SCHMID, R
HECKER, H
Stichwörter: CHALLENGE; DNAK GENE; ELECTROPHORESIS; ESCHERICHIA-COLI; EXPRESSION; GROWTH; GRPE GENE; INDUCTION; Microbiology; NUCLEOTIDE-SEQUENCE; REGULATOR
Erscheinungsdatum: 1992
Herausgeber: SOC GENERAL MICROBIOLOGY
Journal: JOURNAL OF GENERAL MICROBIOLOGY
Volumen: 138
Ausgabe: 10
Startseite: 2125
Seitenende: 2135
Zusammenfassung: 
Bacillus subtilis induced a set of general stress proteins in response to a salt or heat stress. Cells subjected to a mild heat stress showed a protective response which enabled them to survive otherwise lethal temperatures (e.g. 52-degrees-C). In a similar way bacteria were enabled to survive toxic concentrations of NaCl by pretreatment with lower salt concentrations. A mild heat shock induced a cross-protection against lethal salt stress. The pretreatment of cells with low salt, however, was less effective in the induction of thermotolerance than a preceding mild heat stress. Three stress proteins were identified on the basis of their N-terminal amino acid sequences as homologues of GroEL, DnaK and ClpP of Escherichia coli. The role of general and specific stress proteins in the induction of thermotolerance/salt tolerance and cross-protection is discussed.
ISSN: 00221287
DOI: 10.1099/00221287-138-10-2125

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