A trailing ribosome speeds up RNA polymerase at the expense of transcript fidelity via force and allostery.
A trailing ribosome speeds up RNA polymerase at the expense of transcript fidelity via force and allostery.
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尾随的核糖体会以力和变构为代价以牺牲转录本的保真度来加速RNA聚合酶。
DOI:
10.1016/j.cell.2023.02.008
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发表时间:
2023-03-16
期刊:
影响因子:
64.5
通讯作者:
Bustamante, Carlos J.
中科院分区:
文献类型:
--
作者:
Wee, Liang Meng;Tong, Alexander B.;Ariza, Alfredo Jose Florez;Canari-Chumpitaz, Cristhian;Grob, Patricia;Nogales, Eva;Bustamante, Carlos J.
In prokaryotes, translation can occur on mRNA that is being transcribed in a process called coupling. How the ribosome affects the RNA polymerase (RNAP) during coupling is not well understood. Here, we reconstituted the E. coli coupling system and demonstrated that the ribosome can prevent pausing and termination of RNAP and double the overall transcription rate at the expense of fidelity. Moreover, we monitored single RNAPs coupled to ribosomes and show that coupling increases the pause-free velocity of the polymerase and that a mechanical assisting force is sufficient to explain the majority of the effects of coupling. Also, by cryo-EM, we observed that RNAPs with a terminal mismatch adopt a backtracked conformation, while a coupled ribosome allosterically induces these polymerases toward a catalytically active anti-swiveled state. Finally, we demonstrate that prolonged RNAP pausing is detrimental to cell viability, which could be prevented by polymerase reactivation through a coupled ribosome. A combination of bulk, single molecule, high-throughput sequencing, and cryo-EM demonstrates that the ribosome, through the action of mechanical force and allostery, enhances the activity and reduces the fidelity of RNA polymerase during translation-transcription coupling.
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DOI:
10.1093/bioinformatics/btp163
发表时间:
2009-06-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
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de Hoon MJ
影响因子:
3.4
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通讯作者:
Puglisi, Joseph D.
DOI:
10.1016/j.str.2012.08.017
发表时间:
2012-10-10
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Bøggild A;Sofos N;Andersen KR;Feddersen A;Easter AD;Passmore LA;Brodersen DE
通讯作者:
Brodersen DE
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
5.6
作者:
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通讯作者:
Gonzalez, Ruben L., Jr.