Acquisition of thermotolerance in response to a preconditioning heat treatment at 40 degrees C was studied in mutants of the yeast Saccharomyces cerevisiae lacking a specific heat shock protein or the ability to synthesize proteins at 40 degrees C. A mutant carrying a deletion of heat shock protein hsp 104 and the corresponding wildtype strain were both highly sensitive to heat stress at 50.4 degrees C without preconditioning but both acquired almost the same level of thermotolerance after 60 min of preconditioning. Both strains showed equal induction of trehalose-6-phosphate synthase and accumulated equal levels of trehalose during the treatment. The conditional mutant ts--187 synthesized no proteins during the preconditioning heat treatment but nevertheless acquired thermotolerance, albeit to a lesser degree than the corresponding wildtype strain. Induction of trehalose-6-phosphate synthase and accumulation of trehalose were reduced to a similar extent. These results show that acquisition of thermotolerance and accumulation of trehalose are closely correlated during heat preconditioning and are modulated by protein synthesis but do not require it.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Site | Modification | Modifier | Source | Reference |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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