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The effect of calnexin deletion on the expression level of PDI in Saccharomyces cerevisiae under heat stress conditions

Cellular & Molecular Biology Letters volume 13, pages 38–48 (2008)Cite this article

Abstract

We cultured calnexin-disrupted and wild-type Saccharomyces cerevisiae strains under conditions of heat stress. The growth rate of the calnexin-disrupted yeast was almost the same as that of the wild-type yeast under those conditions. However, the induced mRNA level of the molecular chaperone PDI in the ER was clearly higher in calnexin-disrupted S. cerevisiae relative to the wild type at 37°C, despite being almost the same in the two strains under normal conditions. The western blotting analysis for PDI protein expression in the ER yielded results that show a parallel in their mRNA levels in the two strains. We suggest that PDI may interact with calnexin under heat stress conditions, and that the induction of PDI in the ER can recover part of the function of calnexin in calnexin-disrupted yeast, and result in the same growth rate as in wild-type yeast.

Abbreviations

ER:

endoplasmic reticulum

PAGE:

polyacrylamide gel electrophoresis

PDI:

protein disulfide isomerase

RT-PCR:

reverse transcriptase-polymerase chain reaction

UPR:

unfolding protein

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Authors and Affiliations

  1. Department of Life Science, Liaoning University, Shenyang, 110036, China

    Huili Zhang, Yanyan Ji & Youtao Song

  2. Department of Biological Chemistry, Yamaguchi University, Yamaguchi, 753-8515, Japan

    Jianwei He & Akio Kato

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  1. Huili Zhang
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  2. Jianwei He
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  3. Yanyan Ji
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Correspondence to Youtao Song.

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Zhang, H., He, J., Ji, Y. et al. The effect of calnexin deletion on the expression level of PDI in Saccharomyces cerevisiae under heat stress conditions. Cell Mol Biol Lett 13, 38–48 (2008). https://doi.org/10.2478/s11658-007-0033-y

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  • DOI: https://doi.org/10.2478/s11658-007-0033-y

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Cellular & Molecular Biology Letters

ISSN: 1689-1392

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