A systems biology approach to study glucose repression in the yeast Saccharomyces cerevisiae.

Glucose repression in the yeast Saccharomyces cerevisiae has evolved as a complex regulatory system involving several different pathways. There are two main pathways involved in signal transduction. One has a role in glucose sensing and regulation of glucose transport, while another takes part in repression of a wide range of genes involved in utilization of alternative carbon sources.

Elucidation of the role of Grr1p in glucose sensing by Saccharomyces cerevisiae through genome-wide transcription analysis.

The role of Grr1p in glucose sensing in Saccharomyces cerevisiae was elucidated through genome-wide transcription analysis. From triplicate analysis of a strain with deletion of the GRR1-gene from the genome and an isogenic reference strain, 68 genes were identified to have significantly altered expression using a Student's t-test with Bonferroni correction. These 68 genes were widely distributed across different parts of the cellular metabolism and GRR1-deletion is therefore concluded to result in polytrophic effects, indicating multiple roles for Grr1p.