De novo protein synthesis is essential for thermotolerance acquisition in a Saccharomyces cerevisiae trehalose synthase mutant.
Heat shock (25 degrees C to 37 degrees C for 30 min) acquisition of thermotolerance (at 50 degrees C) was observed in a yeast trehalose synthase mutant and the corresponding control strain. The acquisition of thermotolerance in the control strain was maintained for a significantly longer time than in the trehalose synthase mutant. The heat shock was associated with the synthesis of specific heat shock proteins and, in the case of the control strain, also trehalose accumulation. Inhibition of protein synthesis during the heat shock totally abolished acquisition of thermotolerance in both strains but not trehalose accumulation in the control. It was concluded that trehalose may only be required for prolonged stress protection while heat shock proteins are required for heat shock acquisition of thermotolerance.
Division of Molecular and Cellular Biology, School of Biological Sciences, University of New England, Armidale, NSW, Australia.
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C
Gross
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Watson
D005656:Fungal Proteins / Q000096:biosynthesis; D005964:Glucosyltransferases / Q000235:genetics* / Q000378:metabolism; D006360:Heat-Shock Proteins / Q000096:biosynthesis*; D018869:Heat-Shock Response; D006358:Hot Temperature; D009154:Mutation; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*; D014199:Trehalose / Q000096:biosynthesis*
D005656:Fungal Proteins; D006360:Heat-Shock Proteins; D014199:Trehalose; D005964:Glucosyltransferases; C099692:trehalose synthase