Ordering promoter binding of class III transcription factors TFIIIC1 and TFIIIC2.

Ordering promoter binding of class III transcription factors TFIIIC1 and TFIIIC2.
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III 类转录因子 TFIIIC1 和 TFIIIC2 的启动子结合排序。

DOI:
10.1128/mcb.8.8.3017-3025.1988
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发表时间:
1988
影响因子:
5.3
通讯作者:
Berk,AJ
Berk,AJ
中科院分区:
生物学2区
文献类型:
--
作者:
Dean,N;Berk,AJ

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将哺乳动物III类转录因子TFIIIC分离成两个功能组分,称为TFIIIC 1和TFIIIC 2,使得能够分析它们在转录起始中的功能。模板竞争试验被用来确定这些因子在体外相互作用形成稳定的腺病毒VAI和果蝇tRNAArg基因的前起始复合物的顺序。这些基因和TFIIIC 2(以高亲和力结合B阻断的因子)之间的相互作用对于模板定型是必要的和充分的。当VAI或tRNAArg基因单独与TFIIIC 2预孵育时,随后加入的第二个基因的转录被排除,表明TFIIIC 2稳定地结合第一个模板。此外,TFIIIC 2和这些基因之间的相互作用必须先于TFIIIC 1或TFIIIB发生。一旦TFIIIC 2被结合,TFIIIC 1就可以与tRNAArg和VAI基因结合,尽管它与VAI基因的相互作用不如与tRNAArg基因的稳定。TFIIIB活性稳定地结合到两个基因与TFIIIC 2的复合物。这些结果表明,TFIIIC 2是第一个转录因子结合这些基因,TFIIIB和TFIIIC 1可以相互作用,以形成一个preinitiation复合物。
The separation of the mammalian class III transcription factor TFIIIC into two functional components, termed TFIIIC1 and TFIIIC2, enabled an analysis of their functions in transcription initiation. Template competition assays were used to define the order with which these factors interact in vitro to form stable preinitiation complexes on the adenovirus VAI andDrosophila melanogastertRNAArggenes. The interaction between these genes and TFIIIC2, the factor that binds with high affinity to the B block, was both necessary and sufficient for template commitment. When either the VAI or tRNAArggene was preincubated with TFIIIC2 alone, transcription of a second gene added subsequently was excluded, indicating that TFIIIC2 bound stably to the first template. Furthermore, the interaction between TFIIIC2 and these genes must occur prior to that of TFIIIC1 or TFIIIB. Once TFIIIC2 was bound, TFIIIC1 could bind to the tRNAArgand VAI genes, although its interaction with the VAI gene was less stable than that with the tRNAArggene. TFIIIB activity bound stably to the complex of both genes with TFIIIC2. These results demonstrate that TFIIIC2 is the first transcription factor to bind to these genes and that TFIIIB and TFIIIC1 can then interact in either order to form a preinitiation complex.
2 型腺病毒特异性 VARNA1 基因中 A 和 B 块的功能和相互作用。
DOI: 10.1073/pnas.83.5.1285
发表时间: 1986
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期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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DOI: 10.1016/0092-8674(78)90291-x
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期刊: CELL
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BIRKENMEIER, EH;BROWN, DD;JORDAN, E
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DOI: 10.1073/pnas.78.6.3378
发表时间: 1981-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
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GUILFOYLE, R;WEINMANN, R
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