Controlled interplay between trigger loop and Gre factor in the RNA polymerase active centre.
Controlled interplay between trigger loop and Gre factor in the RNA polymerase active centre.
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DOI:
10.1093/nar/gkq1359
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发表时间:
2011-05
影响因子:
14.9
通讯作者:
Zenkin N
中科院分区:
文献类型:
--
作者:
Roghanian M;Yuzenkova Y;Zenkin N
The highly processive transcription by multi-subunit RNA polymerases (RNAP) can be interrupted by misincorporation or backtracking events that may stall transcription or lead to erroneous transcripts. Backtracked/misincorporated complexes can be resolved via hydrolysis of the transcript. Here, we show that, in response to misincorporation and/or backtracking, the catalytic domain of RNAP active centre, the trigger loop (TL), is substituted by transcription factor Gre. This substitution turns off the intrinsic TL-dependent hydrolytic activity of RNAP active centre, and exchanges it to a far more efficient Gre-dependent mechanism of RNA hydrolysis. Replacement of the TL by Gre factor occurs only in backtracked/misincorporated complexes, and not in correctly elongating complexes. This controlled switching of RNAP activities allows the processivity of elongation to be unaffected by the hydrolytic activity of Gre, while ensuring efficient proofreading of transcription and resolution of backtracked complexes.
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影响因子:
16.8
作者:
通讯作者:
--
影响因子:
16
作者:
Kireeva, Maria L.;Nedialkov, Yuri A.;Kashlev, Mikhail
通讯作者:
Kashlev, Mikhail
DOI:
10.1073/pnas.92.10.4596
发表时间:
1995-05-09
影响因子:
11.1
作者:
ORLOVA, M;NEWLANDS, J;BORUKHOV, S
通讯作者:
BORUKHOV, S
影响因子:
16
作者:
Kettenberger, H;Armache, KJ;Cramer, P
通讯作者:
Cramer, P
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7.7
作者:
Vassylyeva, Marina N.;Svetlov, Vladimir;Vassylyev, Dmitry G.
通讯作者:
Vassylyev, Dmitry G.