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Control of transcription initiation in vitro requires binding of a transcription factor to the distal promoter of the ovalbumin gene.

机译:体外转录起始的控制需要转录因子与卵清蛋白基因的远端启动子结合。

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We used a cell-free HeLa cell transcription system to identify and characterize transcription factors and the promoter elements that they recognize in RNA polymerase II-transcribed genes. Deletion of the region (-71 to -83) containing the GTCAAA direct repeat resulted in a marked decrease of specific transcription of the ovalbumin gene; transcription could be competed with DNA fragments containing this sequence. Furthermore, DNase I footprinting identified a protein-binding site including this direct repeat with crude extracts and one of the partially purified protein fractions required for transcription. We propose that a soluble factor activates transcription through binding to the direct repeat of GTCAAA sequence upstream from the ovalbumin gene.
机译:我们使用了无细胞的HeLa细胞转录系统来鉴定和表征转录因子及其在RNA聚合酶II转录的基因中识别的启动子元件。删除含有GTCAAA直接重复序列的区域(-71至-83)会导致卵清蛋白基因的特异性转录显着降低;转录可以与含有该序列的DNA片段竞争。此外,DNase I足迹识别了一个蛋白质结合位点,包括与粗提物的直接重复以及转录所需的部分纯化的蛋白质部分。我们建议可溶性因子通过结合卵清蛋白基因上游的GTCAAA序列的直接重复序列来激活转录。

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