Current Microbiology

, Volume 20, Issue 6, pp 391–396 | Cite as

Heat shock protein induction and the acquisition of thermotolerance in the psychrotrophic yeastTrichosporon pullulans

  • Craig R. Julseth
  • William E. Inniss


Two-dimensional gel electrophoretic analysis of the heat shock response in the psychrotrophic yeastTrichosporon pullulans revealed the induction of 11 heat shock proteins (hsps) after a 5° to 21°C heat shock, 12 hsps after a 5° to 26°C heat shock, and 12 hsps after a 5° to 29°C heat shock. Heat shock from 5° to 26° or 29°C resulted in a statistically significant increase in thermotolerance to a lethal heat challenge at 45°C for 5 min. When the protein synthesis inhibitor, cycloheximide, was added prior to the heat shock, no statistically significant thermotolerance was acquired. To confirm the correlation between the synthesis of hsps and the acquisition of thermotolerance, protein extracts of cells that had been heat shocked in the presence or absence of cycloheximide were electrophoretically analyzed. Addition of the same concentration of cycloheximide that prevented the acquisition of thermotolerance also inhibited the synthesis of any hsps.


Protein Synthesis Heat Shock Heat Shock Protein Protein Extract Cycloheximide 
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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Craig R. Julseth
    • 1
  • William E. Inniss
    • 1
  1. 1.Department of BiologyUniversity of WaterlooWaterlooCanada

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