The human immunodeficiency virus type 1 long terminal repeat specifies two different transcription complexes, only one of which is regulated by Tat

The human immunodeficiency virus type 1 long terminal repeat specifies two different transcription complexes, only one of which is regulated by Tat
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人类免疫缺陷病毒1型长末端重复指定两种不同的转录复合物,其中只有一种受Tat调控

DOI:
10.1128/jvi.67.4.1752-1760.1993
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发表时间:
1993
影响因子:
5.4
通讯作者:
Howard Hughes
Howard Hughes
中科院分区:
医学2区
文献类型:
--
作者:
Xiaobin Lu;T. M. Welsh;B. Peterlin;Howard Hughes

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人类免疫缺陷病毒1型长末端重复序列建立了两种不同的转录复合体,称为进行性和非进行性复合体。通过突变和替换顺式作用序列,我们绘制了人类免疫缺陷病毒长末端重复序列的元件,这些元件负责创建每个转录复合体。在没有TATA盒的情况下,进程复合体可以由上游启动子元件有效地组装,而非进程复合体绝对需要TATA盒。此外,仅TATA盒就可以建立这些非进行性复合体,TAT反式激活非进展性而不是进行性复合体。最后,TATA盒和反式激活反应区域之间的一个强大的DNA结合位点干扰了这些非进行性复合体的组装或移动,并减弱了TAT的影响。因此,TAT在伸长能力转录复合体的形成过程中起着关键作用。
The human immunodeficiency virus type 1 long terminal repeat sets up two different transcription complexes, which have been called processive and nonprocessive complexes. By mutating and substituting cis-acting sequences, we mapped elements of the human immunodeficiency virus long terminal repeat that are responsible for creating each transcription complex. Whereas processive complexes are efficiently assembled by upstream promoter elements in the absence of the TATA box, nonprocessive complexes absolutely require the TATA box. Moreover, the TATA box alone can set up these nonprocessive complexes, and nonprocessive but not processive complexes are trans activated by Tat. Finally, a strong DNA-binding site between the TATA box and trans-activation-responsive region interferes with either the assembly or movement of these nonprocessive complexes and diminishes the effects of Tat. Thus, Tat affects a critical step in the formation of elongation-competent transcription complexes.
DOI: 10.1126/science.2006421
发表时间: 1991-03-22
期刊: SCIENCE
影响因子: 56.9
作者:
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发表时间: 1990-12
影响因子: 4.4
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发表时间: 1990
期刊: Oncogene
影响因子: 8
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