NDLI: Growth-Independent Regulation of CLN3 mRNA Levels by Nutrients in Saccharomyces cerevisiae

Content Provider	PubMed Central
Author	Parviz, Fereshteh Heideman, Warren
Copyright Year	1998
Abstract	Saccharomyces cerevisiae cells regulate progress through the G1 phase of the cell cycle in response to nutrients, moving quickly through G1 in rich medium and slowly in poor medium. Recent work has shown that the levels of Cln3 protein, a G1 cyclin, are low in cells growing in poor medium and high in cells growing rapidly in rich medium, consistent with the previously recognized role of Cln3 in promoting passage through Start. Cln3 protein levels appear to be regulated both transcriptionally and posttranscriptionally. We have worked to define the nutrient signals that regulate CLN3 mRNA levels. We find that CLN3 mRNA levels are high during log-phase growth in glucose medium, low in postdiauxic cells growing on ethanol, and slightly lower still in cells in stationary phase. CLN3 mRNA levels are induced by glucose in a process that involves transcriptional control, requires metabolism of the glucose, and is independent of the Ras-cyclic AMP pathway. CLN3 mRNA levels are also positively regulated by nitrogen sources, but phosphorus and sulfur limitation do not affect CLN3 message levels.
Starting Page	225
File Format	PDF
ISSN	10985530
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	2
Volume Number	180
Language	English
Publisher	American Society for Microbiology
Publisher Date	1998-01-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Microbiology

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