The Yeast Snt2 Protein Coordinates the Transcriptional Response to Hydrogen Peroxide-Mediated Oxidative Stress
The Yeast Snt2 Protein Coordinates the Transcriptional Response to Hydrogen Peroxide-Mediated Oxidative Stress
Regulation of gene expression is a vital part of the cellular stress response, yet the full set of proteins that orchestrate this regulation remains unknown. Snt2 is a Saccharomyces cerevisiae protein whose function has not been well characterized that was recently shown to associate with Ecm5 and the Rpd3 deacetylase. Here, we confirm that Snt2, Ecm5, and Rpd3 physically associate. We then demonstrate that cells lacking Rpd3 or Snt2 are resistant to hydrogen peroxide (H2O2)-mediated oxidative stress and use chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) to show that Snt2 and Ecm5 recruit Rpd3 to a small number of promoters and in response to H2O2, colocalize independently of Rpd3 to the promoters of stress response genes. By integrating ChIP-seq and expression analyses, we identify target genes that require Snt2 for proper expression after H2O2. Finally, we show that cells lacking Snt2 are also resistant to nutrient stress imparted by the TOR (target of rapamycin) pathway inhibitor rapamycin and identify a common set of genes targeted by Snt2 and Ecm5 in response to both H2O2 and rapamycin. Our results establish a function for Snt2 in regulating transcription in response to oxidative stress and suggest Snt2 may also function in multiple stress pathways.
- Albert Einstein College of Medicine United States
- Rockefeller University United States
Sirolimus, Chromatin Immunoprecipitation, Antifungal Agents, Saccharomyces cerevisiae Proteins, Reverse Transcriptase Polymerase Chain Reaction, Gene Expression Profiling, Immunoblotting, Hydrogen Peroxide, Saccharomyces cerevisiae, Sequence Analysis, DNA, Oxidants, Histone Deacetylases, DNA-Binding Proteins, Oxidative Stress, Drug Resistance, Fungal, Gene Expression Regulation, Fungal, Mutation, Promoter Regions, Genetic, Oligonucleotide Array Sequence Analysis, Protein Binding
Sirolimus, Chromatin Immunoprecipitation, Antifungal Agents, Saccharomyces cerevisiae Proteins, Reverse Transcriptase Polymerase Chain Reaction, Gene Expression Profiling, Immunoblotting, Hydrogen Peroxide, Saccharomyces cerevisiae, Sequence Analysis, DNA, Oxidants, Histone Deacetylases, DNA-Binding Proteins, Oxidative Stress, Drug Resistance, Fungal, Gene Expression Regulation, Fungal, Mutation, Promoter Regions, Genetic, Oligonucleotide Array Sequence Analysis, Protein Binding
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