Reference: Mazzola D, et al. (2015) Inhibition of Yap2 activity by MAPKAP kinase Rck1 affects yeast tolerance to cadmium. FEBS Lett 589(19 Pt B):2841-9

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Abstract


Yap2 is a cadmium responsive transcription factor that interacts with MAPK-activated protein (MAPKAP) kinase Rck1. We show that Rck1 deletion confers protection against cadmium toxicity and that the mechanism underlying this observation relies on Yap2. Rck1 removal from the yeast genome potentiates Yap2 activity by increasing protein half-life and delaying its nuclear export. As a consequence, several Yap2 antioxidant targets are over-activated by a mechanism that also requires Yap1. Several genes of the cell wall integrity (CWI) pathway are upregulated under cadmium stress in a Yap2 dependent way. We showed that deletion of CWI genes renders yeast cells more sensitive to cadmium. These findings led us to suggest that in response to cadmium stress Yap2 may serve a dual purpose: oxidative stress attenuation and cell wall maintenance.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Mazzola D, Pimentel C, Caetano S, Amaral C, Menezes R, Santos CN, Eleutherio E, Rodrigues-Pousada C
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