Cell wall integrity signaling in Saccharomyces cerevisiae

被引:913
作者
Levin, DE [1 ]
机构
[1] Johns Hopkins Univ, Sch Publ Hlth, Dept Biochem & Mol Biol, Baltimore, MD 21205 USA
关键词
D O I
10.1128/MMBR.69.2.262-291.2005
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The yeast cell wall is a highly dynamic structure that is responsible for protecting the cell from rapid changes in external osmotic potential. The wall is also critical for cell expansion during growth and morphogenesis. This review discusses recent advances tit understanding the various signal transduction pathways that allow cells to monitor the state of the cell wall and respond to environmental challenges to this structure. The cell wall integrity signaling pathway controlled by the small G-protein Rho1 is principally responsible for orchestrating changes to the cell wall periodically, through the cell cycle and in response to various forms of cell wall stress. This signaling pathway, acts through direct control of wall biosynthetic enzymes, transcriptional regulation of cell wall-related genes, and polarization of the actin cytoskeleton. However, additional signaling pathways interface both with the cell wall integrity, signaling pathway and with the actin cytoskeleton to coordinate polarized secretion with cell wall expansion. These include Ca2+ signaling, phosphatidylinositide signaling at the plasma membrane, sphingoid base signaling through the Pkh1 and -2 protein kinases, Tor kinase signaling. and pathways controlled by the Rho3, Rho4, and Cdc42 G-proteins.
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收藏
页码:262 / +
页数:31
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