Structure of the human Mediator-bound transcription preinitiation complex.

Structure of the human Mediator-bound transcription preinitiation complex.
复制标题

DOI:
10.1126/science.abg3074
复制
发表时间:
2021-04-02
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
He Y
He Y
中科院分区:
其他
文献类型:
--
作者:
Abdella R;Talyzina A;Chen S;Inouye CJ;Tjian R;He Y

文献摘要

参考文献

被引文献

相似文献

真核转录需要组装由 RNA 聚合酶 II (Pol II) 和通用转录因子组成的多亚基预起始复合物 (PIC)。共激活剂介体由转录因子募集,促进 PIC 的组装,并刺激 TFIIH 亚基 CDK7 对 Pol II C 末端结构域 (CTD) 的磷酸化。在这里,我们展示了亚 4 Å 的人类介体结合 PIC 的冷冻电子显微镜结构。介体内的转录因子结合位点主要灵活地连接到尾部模块。 CDK7 通过与 Mediator 的多次接触而稳定。 Pol II CTD 存在两个结合位点,一个位于 Mediator 的头部和中间模块之间,另一个位于 CDK7 的活性位点,为 Pol II CTD 在 Mediator 结合的 PIC 内磷酸化提供了结构证据。冷冻电子显微镜揭示了人类介体结合的转录前起始复合物的高分辨率结构。
Eukaryotic transcription requires the assembly of a multi-subunit pre-initiation complex (PIC) comprised of RNA polymerase II (Pol II) and the general transcription factors. The co-activator Mediator is recruited by transcription factors, facilitates the assembly of the PIC, and stimulates phosphorylation of the Pol II C-terminal domain (CTD) by the TFIIH subunit CDK7. Here, we present the cryo-electron microscopy structure of the human Mediator-bound PIC at sub-4 Å. Transcription factor binding sites within Mediator are primarily flexibly tethered to the tail module. CDK7 is stabilized by multiple contacts with Mediator. Two binding sites exist for the Pol II CTD, one between the head and middle modules of Mediator and the other in the active site of CDK7, providing structural evidence for Pol II CTD phosphorylation within the Mediator-bound PIC. Cryo-electron microscopy reveals the high-resolution structure of the human Mediator-bound transcription pre-initiation complex.
DOI: 10.1016/j.cell.2019.07.011
发表时间: 2019-08-22
期刊: Cell
影响因子: 64.5
作者:
El Khattabi L;Zhao H;Kalchschmidt J;Young N;Jung S;Van Blerkom P;Kieffer-Kwon P;Kieffer-Kwon KR;Park S;Wang X;Krebs J;Tripathi S;Sakabe N;Sobreira DR;Huang SC;Rao SSP;Pruett N;Chauss D;Sadler E;Lopez A;Nóbrega MA;Aiden EL;Asturias FJ;Casellas R
通讯作者: Casellas R
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: 10.1016/j.molcel.2008.06.021
发表时间: 2008-08-08
期刊: MOLECULAR CELL
影响因子: 16
作者:
Esnault, Cyril;Ghavi-Helm, Yad;Werner, Michel
通讯作者: Werner, Michel
DOI: 10.1016/j.jmb.2012.02.014
发表时间: 2012-04-13
影响因子: 5.6
作者:
Bernecky, Carrie;Taatjes, Dylan J.
通讯作者: Taatjes, Dylan J.
DOI: 10.1093/nar/gkv332
发表时间: 2015-07-01
影响因子: 14.9
作者:
Drozdetskiy A;Cole C;Procter J;Barton GJ
通讯作者: Barton GJ