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首页> 外文期刊>Molecular and Cellular Biology >Mechanism of estrogen receptor-dependent transcription in a cell-free system.
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Mechanism of estrogen receptor-dependent transcription in a cell-free system.

机译:无细胞系统中雌激素受体依赖性转录的机制。

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RNA synthesis was stimulated directly in a cell-free expression system by crude preparations of recombinant mouse estrogen receptor (ER). Receptor-stimulated transcription required the presence of estrogen response elements (EREs) in the test template and could be specifically inhibited by addition of competitor oligonucleotides containing EREs. Moreover, polyclonal antibodies directed against the DNA-binding region of ER inhibited ER-dependent transcription. In our cell-free expression system, hormone-free ER induced transcription in a hormone-independent manner. Evidence is presented suggesting that ER acts by facilitating the formation of a stable preinitiation complex at the target gene promoter and thus augments the initiation of transcription by RNA polymerase II. These observations lend support to our current understanding of the mechanism of steroid receptor-regulated gene expression and suggest strong conservation of function among members of the steroid receptor superfamily.
机译:重组小鼠雌激素受体(ER)的粗制品可在无细胞表达系统中直接刺激RNA合成。受体刺激的转录需要在测试模板中存在雌激素反应元件(ERE),并且可以通过添加含有ERE的竞争性寡核苷酸来特异性抑制。而且,针对ER的DNA结合区的多克隆抗体抑制ER依赖性转录。在我们的无细胞表达系统中,无激素的ER以非激素依赖性的方式诱导转录。提出的证据表明ER通过促进在靶基因启动子处形成稳定的预起始复合物而起作用,并因此增加了RNA聚合酶II的转录起始。这些观察结果为我们目前对类固醇受体调节的基因表达机制的理解提供了支持,并暗示了类固醇受体超家族成员之间强烈的功能保守性。

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