Structural basis of transcription-translation coupling.

Structural basis of transcription-translation coupling.
复制标题

DOI:
10.1126/science.abb5317
复制
发表时间:
2020-09-11
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Ebright RH
Ebright RH
中科院分区:
其他
文献类型:
--
作者:
Wang C;Molodtsov V;Firlar E;Kaelber JT;Blaha G;Su M;Ebright RH

文献摘要

参考文献

被引文献

相似文献

在细菌中,转录和翻译是耦合的过程,其中合成mRNA的RNA聚合酶(RNAP)的运动与第一个核糖体翻译的mRNA的运动相协调。偶联受转录因子NusG和NusA的调节,NusG被认为是连接RNAP和核糖体的桥梁。在这里,我们报告了大肠杆菌转录-翻译复合体(TTC)的冷冻EM结构,该复合体包含RNAP和核糖体活性中心P-位点之间不同长度的mRNA间隔物。含有短间隔区的TTCs结构显示出与NusG桥联和NusA结合(TTC-A;以前称为“表达体”)不相容的状态。含有较长间隔的TTCs结构揭示了一种与NusG桥联和NusA结合(TTC-B)兼容的新状态,并揭示了NusG桥和NusA结合的方式。我们认为TTC-B介导了NusG和NusA依赖的转录-翻译偶联。Cryo-EM定义了在细菌中介导NusG和NusA依赖的转录-翻译偶联的状态
In bacteria, transcription and translation are coupled processes, in which movement of RNA polymerase (RNAP) synthesizing mRNA is coordinated with movement of the first ribosome translating mRNA. Coupling is modulated by the transcription factors NusG--which is thought to bridge RNAP and ribosome--and NusA. Here, we report cryo-EM structures of Escherichia coli transcription-translation complexes (TTCs) containing different-length mRNA spacers between RNAP and the ribosome active-center P-site. Structures of TTCs containing short spacers show a state incompatible with NusG bridging and NusA binding (TTC-A; previously termed “expressome”). Structures of TTCs containing longer spacers reveal a new state compatible with NusG bridging and NusA binding (TTC-B) and reveal how NusG bridges and NusA binds. We propose that TTC-B mediates NusG- and NusA-dependent transcription-translation coupling. Cryo-EM defines states that mediate NusG- and NusA-dependent transcription-translation coupling in bacteria
DOI: 10.1038/s41564-018-0237-0
发表时间: 2018-10-01
影响因子: 28.3
作者:
Beckert, Bertrand;Turk, Martin;Wilson, Daniel N.
通讯作者: Wilson, Daniel N.
DOI: 10.1038/srep02347
发表时间: 2013
期刊: Scientific reports
影响因子: 4.6
作者:
Li K;Jiang T;Yu B;Wang L;Gao C;Ma C;Xu P;Ma Y
通讯作者: Ma Y
DOI: 10.1093/nar/gkx719
发表时间: 2017-11-02
影响因子: 14.9
作者:
Fan H;Conn AB;Williams PB;Diggs S;Hahm J;Gamper HB Jr;Hou YM;O'Leary SE;Wang Y;Blaha GM
通讯作者: Blaha GM
DOI: 10.1073/pnas.1812940115
发表时间: 2018-10-16
影响因子: 11.1
作者:
Chen, Menglin;Fredrick, Kurt
通讯作者: Fredrick, Kurt
DOI: 10.1107/s2059798319011471
发表时间: 2019-10-01
影响因子: 2.2
作者:
Liebschner, Dorothee;Afonine, Pavel V.;Adams, Paul D.
通讯作者: Adams, Paul D.