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首页> 外文期刊>Molecular and Cellular Biology >The adenovirus-inducible factor E2F stimulates transcription after specific DNA binding.
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The adenovirus-inducible factor E2F stimulates transcription after specific DNA binding.

机译:腺病毒诱导因子E2F在特异性DNA结合后刺激转录。

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The promoter-specific factor E2F interacts with critical regulatory sequences within the adenovirus E2 promoter. In addition, the level of active factor increases markedly during a virus infection, dependent on E1A function and coincident with the trans activation of E2 transcription. We have purified the E2F factor through a combination of standard biochemical procedures and DNA affinity chromatography. The purified factor was a single polypeptide of 54,000 molecular weight, as determined by UV crosslinking and renaturation of gel-fractionated protein. Addition of affinity-purified factor to an in vitro transcription system resulted in stimulation of transcription from a promoter containing two E2F-binding sites but not promoters lacking binding sites. We thus conclude that E2F is indeed capable of stimulating transcription once it has bound to the promoter.
机译:启动子特异性因子E2F与腺病毒E2启动子中的关键调控序列相互作用。另外,在病毒感染期间,活性因子的水平显着增加,这取决于E1A功能并与E2转录的反式激活同时发生。我们已经通过标准的生化程序和DNA亲和层析相结合来纯化E2F因子。纯化的因子是分子量为54,000的单个多肽,通过UV交联和凝胶分离蛋白的复性测定。将亲和纯化的因子添加到体外转录系统中导致刺激了含有两个E2F结合位点的启动子的转录,但没有缺少结合位点的启动子。因此,我们得出的结论是,一旦E2F与启动子结合,它确实能够刺激转录。

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