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  • Title: Cadmium-induced activation of high osmolarity glycerol pathway through its Sln1 branch is dependent on the MAP kinase kinase kinase Ssk2, but not its paralog Ssk22, in budding yeast.
    Author: Jiang L, Cao C, Zhang L, Lin W, Xia J, Xu H, Zhang Y.
    Journal: FEMS Yeast Res; 2014 Dec; 14(8):1263-72. PubMed ID: 25331360.
    Abstract:
    Cadmium ions disrupt reactive oxygen species/Ca(2+) homeostasis and subsequently elicit cell death and adaptive signaling cascades in eukaryotic cells. Through a functional genomics approach, we have identified deletion mutants of 106 yeast genes, including three MAP kinase genes (HOG1, SLT2, and KSS1), are sensitive to a sublethal concentration of cadmium, and 64 mutants show elevated intracellular cadmium concentrations upon exposure to cadmium. Hog1 is phosphorylated, reaching a peak 30 min after the cadmium treatment. Both Sln1 and Sho1 upstream branches are involved in the cadmium-induced activation of high osmolarity glycerol (HOG) pathway. Cadmium-induced HOG activation is dependent on the MAP kinase kinase kinase Ssk2, but not its paralog Ssk22, in the Sln1 branch.
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