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Identification of the upstream activating sequence of MAL and the binding sites for the MAL63 activator of Saccharomyces cerevisiae.

机译:鉴定啤酒酵母的上游激活序列和MAL63激活子的结合位点。

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Maltose fermentation in Saccharomyces species requires the presence of at least one of five unlinked MAL loci: MAL1, MAL2, MAL3, MAL4, and MAL6. Each of these loci consists of a complex of genes involved in maltose metabolism; the complex includes maltase, a maltose permease, and an activator of these genes. At the MAL6 locus, the activator is encoded by the MAL63 gene. While the MAL6 locus has been the subject of numerous studies, the binding sites of the MAL63 activator have not been determined. In this study, we used Escherichia coli extracts containing the MAL63 protein to define the binding sites of the MAL63 protein in the divergently transcribed MAL61-62 promotor. When a DNA fragment containing these sites was placed upstream of a CYC1-lacZ gene, maltose induced beta-galactosidase. These sites therefore constitute an upstream activating sequence for the MAL genes.
机译:酵母菌种中的麦芽糖发酵需要存在五个未连接的MAL基因座中的至少一个:MAL1,MAL2,MAL3,MAL4和MAL6。这些基因座均由与麦芽糖代谢有关的基因复合体组成。该复合物包括麦芽糖酶,麦芽糖通透酶和这些基因的激活剂。在MAL6位点,激活物由MAL63基因编码。尽管MAL6基因座已成为众多研究的主题,但尚未确定MAL63激活剂的结合位点。在这项研究中,我们使用含有MAL63蛋白的大肠杆菌提取物来定义在不同转录的MAL61-62启动子中MAL63蛋白的结合位点。当将包含这些位点的DNA片段置于CYC1-lacZ基因的上游时,麦芽糖诱导了β-半乳糖苷酶。因此,这些位点构成了MAL基因的上游激活序列。

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