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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A role for TFIIH in controlling the activity of early RNA polymerase II elongation complexes
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A role for TFIIH in controlling the activity of early RNA polymerase II elongation complexes

机译:TFIIH在控制早期RNA聚合酶II延伸复合物活性中的作用

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摘要

TFIIH is a multifunctional RNA polymerase II transcription factor that possesses DNA-dependent AT- Pase, DNA helicase, and protein kinase activities. Previous studies have established that TFIIH enters the preinitiation complex and fulfills a critical role in initiation by catalyzing ATP-dependent formation of the open complex prior to syn- thesis of the first phosphodiester bond of nascent transcripts. In this report, we present direct evidence that TFIIH also controls RNA polymerase II activity at a postinitiation stage of transcription, by preventing premature arrest by very early elongation complexes just prior to their transition to stably elongating complexes.
机译:TFIIH是一种多功能RNA聚合酶II转录因子,具有DNA依赖性AT-Pase,DNA解旋酶和蛋白激酶活性。先前的研究已经确定,TFIIH可以在合成初生转录物的第一个磷酸二酯键之前,通过催化ATP依赖的开放复合物的形成,进入预起始复合物并在启动中起关键作用。在此报告中,我们提供了直接的证据,即TFIIH在转录的起始后阶段还通过防止非常早的延伸复合物过早停滞,从而在过渡到稳定延伸的复合物之前控制了RNA聚合酶II的活性。

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