Cdc73 majorly regulates apoptosis-inducing factor (AIF1) in Saccharomyces cerevisiae via the H3K36 methylation
Saha, N.; Acharjee, S.; Tomar, R. S.
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AIF1 overexpression is intimately linked to the sensitivity of the yeast cells towards hydrogen peroxide or acetic acid. Therefore, studying the mechanism of its regulation in the cell would provide a significant understanding of the factors ultimately guiding yeast apoptosis. In this report, we establish the time-dependent induction of AIF1 in hydrogen peroxide stress. Additionally, the AIF1 expression in hydrogen peroxide is mediated by two transcription factors, Yap5 (DNA binding) and Cdc73 (non-DNA binding). Furthermore, substituting the H3K36 residue with another significantly abrogates the AIF1 expression. However, substituting H3K4 or H3K79 with A does not affect the AIF1 expression level under hydrogen peroxide stress. Altogether, the significant reduction of AIF1 expression in cdc73{Delta} cells plausibly reflects the reduced H3K36me3 modification and is independent of the H3K4me3 modification.
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