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Identification of a Ty1 regulatory sequence responsive to STE7 and STE12.

机译:鉴定响应于STE7和STE12的Ty1调控序列。

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Ty1 activation of gene expression observed in haploid cell types of Saccharomyces cerevisiae requires the STE7 and STE12 gene products. An activator sequence within Ty1 that is responsive to these two regulators has been defined. Complex formation between a factor in whole-cell extracts and the DNA regulatory element showed the same dependence on the STE7 and STE12 gene products as did reporter gene expression. Base pair substitutions within the binding site abolished the ability to form the factor-DNA complex and to activate gene expression. The correlation between complex formation and reporter gene expression indicates that factor binding to the cis-acting element is essential for gene activation. Because the predicted protein for the STE7 gene product is homologous to protein kinases, we suggest that protein phosphorylation may directly or indirectly regulate formation of this DNA-protein complex.
机译:在酿酒酵母的单倍体细胞类型中观察到的Ty1基因表达激活需要STE7和STE12基因产物。已经定义了Ty1内响应于这两个调节子的激活子序列。全细胞提取物中的一种因子与DNA调控元件之间的复合物形成与报告基因表达一样,显示出对STE7和STE12基因产物的相同依赖性。结合位点内的碱基对取代消除了形成因子-DNA复合物和激活基因表达的能力。复合物形成与报道基因表达之间的相关性表明与顺式作用元件结合的因子对于基因激活是必不可少的。因为STE7基因产物的预测蛋白与蛋白激酶同源,所以我们建议蛋白磷酸化可能直接或间接调节此DNA-蛋白复合物的形成。

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