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Estrogen-responsive element of the human pS2 gene is an imperfectly palindromic sequence.

机译:人pS2基因的雌激素反应元件是不完全回文序列。

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摘要

Using chimeric recombinants transfected into HeLa cells and a transient expression assay, we demonstrate that the 5'-flanking region of the pS2 gene from position -428 to position -324 exhibits both constitutive and estrogen-inducible enhancer activity. The estrogen-inducible activity, but not the constitutive activity, was inhibited by antiestrogens. ICI 164,384 behaved as a pure antagonist, whereas hydroxytamoxifen was a partial agonist-antagonist. The estrogen-responsive element of the pS2 gene has been narrowed down by site-directed deletion mutagenesis to a 13-base-pair (position -405 to position -393) imperfectly palindromic sequence, which in isolation can confer estrogen inducibility to the heterologous rabbit beta-globin gene promoter. On the other hand, the sequences responsible for the constitutive enhancer activity are spread over the entire region.
机译:使用转染到HeLa细胞中的嵌合重组体和瞬时表达分析,我们证明了pS2基因从位置-428到位置-324的5'侧翼区域显示了组成型和雌激素诱导型增强子活性。抗雌激素抑制雌激素诱导的活性,但不抑制其组成性活性。 ICI 164,384表现为纯拮抗剂,而羟他莫昔芬为部分激动剂-拮抗剂。通过定点缺失诱变将pS2基因的雌激素响应元件缩小到13个碱基对(位置-405至位置-393)的回文序列不完全,从而可以单独为异源兔提供雌激素诱导性β-珠蛋白基因启动子。另一方面,负责组成型增强子活性的序列分布在整个区域。

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