Reference: Cook WJ and Denis CL (1993) Identification of three genes required for the glucose-dependent transcription of the yeast transcriptional activator ADR1. Curr Genet 23(3):192-200

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Abstract


Glucose repression of the ADH2 gene from Saccharomyces cerevisiae is mediated by the synthesis and activity of the transcriptional activator ADR1. In this study, we isolated mutations in three new genes (SAF1, SAF2 and SAF3) that suppressed the glucose-insensitive expression of ADH2 caused by the ADR1-5c allele. The mechanism by which the SAF genes maintain ADR1-5c function was investigated. Each of the mutated SAF genes was found to suppress ADR1-5c activity by lowering ADR1-5c steady state mRNA levels 5- to 8-fold under glucose growth conditions. ADR1 mRNA levels were similarly affected by the saf mutations. In contrast, mutations in the SAF genes had little or no effect on ADR1-5c or ADR1 mRNA levels under ethanol growth conditions. The stability of ADR1-5c mRNA was unaffected by mutations in each of the SAF genes, implying that the SAF genes are required for the transcription of ADR1 mRNA under glucose growth conditions. The possible function of the three SAF genes in ADR1 expression is discussed.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S.
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Cook WJ, Denis CL
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