This study explores how gene expression in Saccharomyces cerevisiae is remodeled in response to various environmental changes, including temperature, oxidation, nutrients, pH, and osmolarity. Using genome-wide expression analysis, the researchers identified over half of the yeast genome as involved in environmental responses, revealing a common signature of about 10% of yeast genes. The results show that Msn2/Msn4 activators are crucial for the common response to environmental changes. The study also identifies specific genes induced or repressed by each environmental condition, highlighting the role of Msn2/Msn4 in coordinating these responses. The findings provide a global view of transcriptional responses to environmental changes and emphasize the importance of these genes in cellular adaptation. The study also identifies CER genes, which are involved in common environmental responses, and shows that many of these genes are involved in stress responses, protein folding, and energy generation. The results suggest that a significant portion of the yeast genome is involved in environmental adaptation, and that Msn2/Msn4 play a key role in this process. The study also highlights the importance of molecular chaperones in cellular adaptation and the role of transcriptional activators in regulating gene expression in response to environmental changes. The findings contribute to a better understanding of the molecular mechanisms involved in environmental adaptation and the role of transcriptional activators in this process.This study explores how gene expression in Saccharomyces cerevisiae is remodeled in response to various environmental changes, including temperature, oxidation, nutrients, pH, and osmolarity. Using genome-wide expression analysis, the researchers identified over half of the yeast genome as involved in environmental responses, revealing a common signature of about 10% of yeast genes. The results show that Msn2/Msn4 activators are crucial for the common response to environmental changes. The study also identifies specific genes induced or repressed by each environmental condition, highlighting the role of Msn2/Msn4 in coordinating these responses. The findings provide a global view of transcriptional responses to environmental changes and emphasize the importance of these genes in cellular adaptation. The study also identifies CER genes, which are involved in common environmental responses, and shows that many of these genes are involved in stress responses, protein folding, and energy generation. The results suggest that a significant portion of the yeast genome is involved in environmental adaptation, and that Msn2/Msn4 play a key role in this process. The study also highlights the importance of molecular chaperones in cellular adaptation and the role of transcriptional activators in regulating gene expression in response to environmental changes. The findings contribute to a better understanding of the molecular mechanisms involved in environmental adaptation and the role of transcriptional activators in this process.