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• W2063012351 endingPage "277" @default.
• W2063012351 startingPage "263" @default.
• W2063012351 abstract "Summary Protein phosphatases 2C are a family of conserved enzymes involved in many aspects of the cell biology. We reported that, in the yeast Saccharomyces cerevisiae , overexpression of the Ptc3p isoform resulted in increased lithium tolerance in the hypersensitive hal3 background. We have found that the tolerance induced by PTC3 overexpression is also observed in wild‐type cells and that this is most probably the result of increased expression of the ENA1 Na + ‐ATPase mediated by the Hog1 MAP kinase pathway. This effect does not require a catalytically active protein. Surprisingly, deletion of PTC3 (similarly to that of PTC2 , PTC4 or PTC5 ) does not confer a lithium‐sensitive phenotype, but mutation of PTC1 does. Lack of PTC1 in an ena1–4 background did not result in additive lithium sensitivity and the ptc1 mutant showed a decreased expression of the ENA1 gene in cells stressed with LiCl. In agreement, under these conditions, the ptc1 mutant was less effective in extruding Li + and accumulated higher concentrations of this cation. Deletion of PTC1 in a hal3 background did not exacerbate the halosensitive phenotype of the hal3 strain. In addition, induction from the ENA1 promoter under LiCl stress decreased similarly (50%) in hal3 , ptc1 and ptc1 hal3 mutants. Finally, mutation of PTC1 virtually abolishes the increased tolerance to toxic cations provided by overexpression of Hal3p. These results indicate that Ptc1p modulates the function of Ena1p by regulating the Hal3/Ppz1,2 pathway. In conclusion, overexpression of PTC3 and lack of PTC1 affect lithium tolerance in yeast, although through different mechanisms." @default.
• W2063012351 created "2016-06-24" @default.
• W2063012351 creator A5001926467 @default.
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• W2063012351 creator A5069205845 @default.
• W2063012351 creator A5074601374 @default.
• W2063012351 creator A5079404424 @default.
• W2063012351 date "2006-08-31" @default.
• W2063012351 modified "2023-10-16" @default.
• W2063012351 title "Role of protein phosphatases 2C on tolerance to lithium toxicity in the yeast Saccharomyces cerevisiae" @default.
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• W2063012351 doi "https://doi.org/10.1111/j.1365-2958.2006.05370.x" @default.
• W2063012351 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16956380" @default.
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