Reference: Wu M, et al. (1999) Regulation of gene expression by glucose in Saccharomyces cerevisiae: a role for ADA2 and ADA3/NGG1. J Bacteriol 181(16):4755-60

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Abstract

When Saccharomyces cerevisiae cells are transferred from poor medium to fresh medium containing glucose, they rapidly increase the transcription of a large group of genes as they resume rapid growth and accelerate progress through the cell cycle. Among those genes induced by glucose is CLN3, encoding a G(1) cyclin that is thought to play a pivotal role in progression through Start. Deletion of CLN3 delays the increase in proliferation normally observed in response to glucose medium. ADA2 and ADA3/NGG1 are necessary for the rapid induction of CLN3 message levels in response to glucose. Loss of either ADA2 or ADA3/NGG1 also affects a large number of genes and inhibits the rapid global increase in transcription that occurs in response to glucose. Surprisingly, these effects are transitory, and expression of CLN3 and total poly(A)(+) RNA appear normal when ADA2 or ADA3/NGG1 deletion mutants are examined in log-phase growth. These results indicate a role for ADA2 and ADA3/NGG1 in allowing rapid transcriptional responses to environmental signals. Consistent with the role of the Ada proteins in positive regulation of CLN3, deletion of RPD3, encoding a histone deacetylase, prevented the down regulation of CLN3 mRNA in the absence of glucose.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
Authors
Wu M, Newcomb L, Heideman W
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