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Elevated expression of stress response genes resulting from deletion of the PHO85 gene.
- Source :
-
Molecular microbiology [Mol Microbiol] 1997 Dec; Vol. 26 (5), pp. 981-90. - Publication Year :
- 1997
-
Abstract
- The cyclin-dependent protein kinase Pho85 is a known negative regulatory factor for two stress response genes, PHO5 and GSY2, which encode the inducible form of acid phosphatase and glycogen synthase, respectively, in the yeast Saccharomyces cerevisiae. Cells carrying a disruption of the PHO85 gene inappropriately express both PHO5 and GSY2, resulting in the increase in phosphate scavenging and hyperaccumulation of glycogen in nutrient-rich conditions. Constitutive activation of PKA in a pho85 mutant suppresses the hyperaccumulation of glycogen. This work presents data to show that, at least in part, the suppression of glycogen biosynthesis upon activation of PKA in a pho85 mutant results from the suppression of GSY2 expression. In addition to GSY2, disruption of the PHO85 gene inappropriately triggers the derepression of two other stress response genes, HSP12 and UBI4. At least in the case of GSY2, regulation of transcription by Pho85 is not through the stress-responsive cis-promoter elements (STRE). Furthermore, Pho85 may associate with the known cyclin Pho80 in the transcriptional regulation of these genes.
- Subjects :
- Acid Phosphatase biosynthesis
Catalase biosynthesis
Cyclic AMP-Dependent Protein Kinases genetics
Cyclic AMP-Dependent Protein Kinases metabolism
Cyclin-Dependent Kinases genetics
Cyclins genetics
Cyclins metabolism
Fungal Proteins genetics
Fungal Proteins metabolism
Gene Deletion
Genes, Fungal
Glycogen Synthase biosynthesis
Membrane Transport Proteins genetics
Membrane Transport Proteins metabolism
Saccharomyces cerevisiae genetics
Transcription, Genetic
Ubiquitins biosynthesis
Acid Phosphatase genetics
Cyclin-Dependent Kinases metabolism
Gene Expression Regulation, Fungal
Glycogen Synthase genetics
Phosphate Transport Proteins
Repressor Proteins
Saccharomyces cerevisiae enzymology
Saccharomyces cerevisiae Proteins
Subjects
Details
- Language :
- English
- ISSN :
- 0950-382X
- Volume :
- 26
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Molecular microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 9426135
- Full Text :
- https://doi.org/10.1046/j.1365-2958.1997.6352004.x