NDLI: Cross-Pathway Regulation in Saccharomyces cerevisiae: Activation of the Proline Utilization Pathway by Gal4p In Vivo

Content Provider	PubMed Central
Author	D'alessio, Michael Brandriss, Marjorie C.
Copyright Year	2000
Abstract	The Put3p and Gal4p transcriptional activators are members of a distinct class of fungal regulators called the Cys6 Zn(II)2 binuclear cluster family. This family includes over 50 different Saccharomyces cerevisiae proteins that share a similar domain organization. Gal4p activates the genes of the galactose utilization pathway permitting the use of galactose as the sole source of carbon and energy. Put3p controls the expression of the proline utilization pathway that allows yeast cells to grow on proline as the sole nitrogen source. We report that Gal4p can activate the PUT structural genes in a strain lacking Put3p. We also show that the activation of PUT2 by Gal4p depends on the presence of the inducer galactose and the Put3p binding site and that activation increases with increased dosage of Gal4p. Put3p cannot activate the GAL genes in the absence of Gal4p. Our in vivo results confirm previously published in vitro data showing that Gal4p is more promiscuous than Put3p in its DNA binding ability. The results also suggest that under appropriate circumstances, Gal4p may be able to function in place of a related family member to activate expression.
Starting Page	3748
File Format	PDF
ISSN	10985530
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	13
Volume Number	182
Language	English
Publisher	American Society for Microbiology
Publisher Date	2000-07-01
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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