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Reference: Cardillo SB, et al. (2011) Common features and differences in the expression of the three genes forming the UGA regulon in Saccharomyces cerevisiae. Biochem Biophys Res Commun 410(4):885-9

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Abstract

The three genes that form the UGA regulon in Saccharomyces cerevisiae are responsible for the transport and degradation of ?-aminobutyric acid (GABA) in this organism. Despite the differences in the sequence of their promoters, these genes similarly respond to GABA stimuli. The expression of UGA1, UGA2 and UGA4 depends on GABA induction and nitrogen catabolite repression (NCR). The induction of these genes requires the action of at least two positive proteins, the specific Uga3 and the pleiotropic Uga35/Dal81 transcription factors. Here we show that all the members of the UGA regulon, as was already demonstrated for UGA4, are negatively regulated by extracellular amino acids through the SPS amino acid sensor. We also show that this negative effect is caused by a low availability of Uga35/Dal81 transcription factor and that Leu3 transcription factor negatively regulates UGA4 and UGA1 expression but it does not affect UGA2 expression.

Reference Type
Journal Article
Authors
Cardillo SB, Correa Garcia S, Bermudez Moretti M
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