Abstract
Expression of the glucoamylase-encoding gene ( STA2) in Saccharomyces cerevisiae was previously shown to be regulated transcriptionally by both positive and negative factors. The objective of this work was to identify the cis-acting elements responsible for STA2 transcriptional activation as well as the transcriptional repressor effects of STA10 and MATa/MATα. We identified two upstream activation regions ( UAS). Three repressor regions responsive to STA10-mediated repression were identified, as well as two regions for down-regulation of STA2 expression. MATa/MATα repression appears to effect STA2 expression either downstream from the translational start site or, indirectly, since no functional al/α2-responsive sequence was identified in the promoter region.
Published Version
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