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Loss of Dfg5 glycosylphosphatidylinositol-anchored membrane protein confers enhanced heat tolerance in Saccharomyces cerevisiae

Title
Loss of Dfg5 glycosylphosphatidylinositol-anchored membrane protein confers enhanced heat tolerance in Saccharomyces cerevisiae
Authors
Nasution, OlviyaniLee, JaokSrinivasa, KavithaChoi, In-GeolLee, Young MiKim, EunjungChoi, WonjaKim, Wankee
Ewha Authors
최원자이영미
SCOPUS Author ID
최원자scopus
Issue Date
2015
Journal Title
ENVIRONMENTAL MICROBIOLOGY
ISSN
1462-2912JCR Link1462-2920JCR Link
Citation
vol. 17, no. 8, pp. 2721 - 2734
Publisher
WILEY-BLACKWELL
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The protein product of Saccharomyces cerevisiaeDFG5 gene is a glycosylphosphatidylinositol (GPI)-anchored plasma membrane protein and a putative glycosidase/glycosyltransferase that links other GPI-anchored proteins to -glucans in the cell wall. Upon exposure to heat (41 degrees C), DFG5 deletion mutant dfg5 displayed significantly enhanced heat tolerance as well as lowered level of reactive oxygen species and decreased membrane permeability compared with those in the control (BY4741). Comparative transcriptome profiles of BY4741 and dfg5 revealed that 38 and 23 genes were up- and down-regulated in dfg5 respectively. Of the 23 down-regulated genes, 11 of 13 viable deletion mutants were identified to be tolerant to heat, suggesting that the down-regulation of those genes might have contributed to the enhanced heat tolerance in dfg5. Deletion of DFG5 caused slight activation of mitogen-activated protein kinases Hog1 in the high-osmolarity glycerol pathway and Slt2 in the cell wall integrity pathway. Therefore, a model is proposed on the signal transduction pathways associated with deletion of DFG5 upon heat stress.
DOI
10.1111/1462-2920.12649
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자연과학대학 > 생명과학전공 > Journal papers
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