Title : Presence of the Fps1p aquaglyceroporin channel is essential for Hog1p activation, but suppresses Slt2(Mpk1)p activation, with acetic acid stress of yeast.

Pub. Date : 2009 Oct

PMID : 19608606






4 Functional Relationships(s)
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1 Presence of the Fps1p aquaglyceroporin channel is essential for Hog1p activation, but suppresses Slt2(Mpk1)p activation, with acetic acid stress of yeast. Acetic Acid Fps1p Saccharomyces cerevisiae S288C
2 When grown at pH 4.5, Saccharomyces cerevisiae acquires a resistance to inhibitory acetic acid levels ( approximately 0.1 M) by destabilizing Fps1p, the plasma membrane aquaglyceroporin that provides the main route for passive diffusional entry of this acid into the cell. Acetic Acid Fps1p Saccharomyces cerevisiae S288C
3 Acetic acid stress transiently activates Hog1p mitogen-activated protein (MAP) kinase, which, in turn, phosphorylates Fps1p in order to target this channel for endocytosis and degradation in the vacuole. Acetic Acid Fps1p Saccharomyces cerevisiae S288C
4 Lack of Fps1p therefore exerts opposing effects on the activation of Hog1p and Slt2p in yeast exposed to acetic acid stress. Acetic Acid Fps1p Saccharomyces cerevisiae S288C