Reference: Marrakchi R, et al. (2013) A functional autophagy pathway is required for rapamycin-induced degradation of the Sgs1 helicase in Saccharomyces cerevisiae. Biochem Cell Biol 91(3):123-30

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Abstract


In yeast Saccharomyces cerevisiae, the immunosuppressant rapamycin mimics starvation by inhibiting the kinase Tor1. We recently documented that this treatment triggers a rapid degradation of Sgs1, a helicase involved in several biological processes such as the prevention of genomic instability. Herein, we show that yeast strains deleted for genes ATG2, ATG9, and PEP4, encoding components of the autophagy pathway, prevent rapamycin-induced degradation of Sgs1. We propose that defects in the autophagy pathway prevent degradation of key proteins in the rapamycin response pathway and as a consequence cause resistance to the drug.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Marrakchi R, Chouchani C, Poschmann J, Andreev E, Cherif M, Ramotar D
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