Structural basis of three different transcription activation strategies adopted by a single regulator SoxS.
Structural basis of three different transcription activation strategies adopted by a single regulator SoxS.
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单一调节器 SoxS 采用的三种不同转录激活策略的结构基础
DOI:
10.1093/nar/gkac898
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发表时间:
2022-10-28
影响因子:
14.9
通讯作者:
Lin, Wei
中科院分区:
文献类型:
--
作者:
Shi, Jing;Wang, Lu;Wen, Aijia;Wang, Fulin;Zhang, Yuqiong;Yu, Libing;Li, Fangfang;Jin, Yuanling;Feng, Zhenzhen;Li, Jiacong;Yang, Yujiao;Gao, Fei;Zhang, Yu;Feng, Yu;Wang, Shuang;Zhao, Wei;Lin, Wei
Transcription activation is established through extensive protein–protein and protein–DNA interactions that allow an activator to engage and remodel RNA polymerase. SoxS, a global transcription activator, diversely regulates subsets of stress response genes with different promoters, but the detailed SoxS-dependent transcription initiation mechanisms remain obscure. Here, we report cryo-EM structures of three SoxS-dependent transcription activation complexes (SoxS-TACI, SoxS-TACII and SoxS-TACIII) comprising of Escherichia coli RNA polymerase (RNAP), SoxS protein and three representative classes of SoxS-regulated promoters. The structures reveal that SoxS monomer orchestrates transcription initiation through specific interactions with the promoter DNA and different conserved domains of RNAP. In particular, SoxS is positioned in the opposite orientation in SoxS-TACIII to that in SoxS-TACI and SoxS-TACII, unveiling a novel mode of transcription activation. Strikingly, two universally conserved C-terminal domains of alpha subunit (αCTD) of RNAP associate with each other, bridging SoxS and region 4 of σ70. We show that SoxS interacts with RNAP directly and independently from DNA, remodeling the enzyme to activate transcription from cognate SoxS promoters while repressing transcription from UP-element containing promoters. Our data provide a comprehensive summary of SoxS-dependent promoter architectures and offer new insights into the αCTD contribution to transcription control in bacteria.
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DOI:
10.1107/s2059798318009324
发表时间:
2018-09-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Klaholz BP;Moriarty NW;Poon BK;Sobolev OV;Terwilliger TC;Adams PD;Urzhumtsev A
通讯作者:
Urzhumtsev A
影响因子:
64.5
作者:
Feklistov A;Darst SA
通讯作者:
Darst SA
影响因子:
5.6
作者:
Zafar MA;Sanchez-Alberola N;Wolf RE Jr
通讯作者:
Wolf RE Jr
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1006/bbrc.2002.6559
发表时间:
2002-03-08
影响因子:
3.1
作者:
Griffith, KL;Shah, IM;Wolf, RE
通讯作者:
Wolf, RE