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A mutated allele of the essential gene  TAH18  was previously identified in our laboratory in a genetic screen for new proteins interacting with the DNA polymerase delta in yeast  [1] . The present work shows that Tah18 plays a role in response to oxidative stress. After exposure to lethal doses of H 2 O 2 , GFP-Tah18 relocalizes to the mitochondria and controls mitochondria integrity and cell death. Dre2, an essential Fe/S cluster protein and homologue of human anti-apoptotic Ciapin1, was identified as a molecular partner of Tah18 in the absence of stress. Moreover, Ciapin1 is able to replace yeast Dre2  in vivo  and physically interacts with Tah18. Our results are in favour of an oxidative stress-induced cell death in yeast that involves mitochondria and is controlled by the newly identified Dre2-Tah18 complex.

A Newly Identified Essential Complex, Dre2-Tah18, Controls Mitochondria Integrity and Cell Death after Oxidative Stress in Yeast