Poly(ADP-ribosylation) of P-TEFb by PARP1 disrupts phase separation to inhibit global transcription after DNA damage.
Poly(ADP-ribosylation) of P-TEFb by PARP1 disrupts phase separation to inhibit global transcription after DNA damage.
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DOI:
10.1038/s41556-022-00872-5
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发表时间:
2022-04
影响因子:
21.3
通讯作者:
中科院分区:
文献类型:
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DNA damage shuts down genome-wide transcription to prevent transcriptional mutagenesis and initiate repair signaling, but the mechanism to stall elongating RNA polymerase (Pol) II is not fully understood. Central to the DNA damage response, the Poly(ADP-ribose) polymerase 1 (PARP1) initiates DNA repair by translocating to the lesions, where it catalyzes protein poly(ADP-ribosylation). Here, we report that PARP1 inhibits Pol II elongation through inactivating the transcription elongation factor P-TEFb, a CDK9-cyclin T1 (CycT1) heterodimer. Upon sensing damage, the activated PARP1 binds to transcriptionally engaged P-TEFb and modifies CycT1 at multiple positions, including histidines that are rarely used as an acceptor site. This prevents CycT1 from undergoing liquid-liquid phase separation that is required for CDK9 to hyperphosphorylate Pol II and stimulate elongation. Functionally, poly(ADP-ribosylation) of CycT1 promotes DNA repair and cell survival. Thus, the PARP1-P-TEFb signaling plays a protective role in transcription quality control and genomic stability maintenance upon DNA damage.
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影响因子:
16
作者:
Beli, Petra;Lukashchuk, Natalia;Wagner, Sebastian A.;Weinert, Brian T.;Olsen, Jesper V.;Baskcomb, Linda;Mann, Matthias;Jackson, Stephen P.;Choudhary, Chunaram
通讯作者:
Choudhary, Chunaram
DOI:
10.1002/advs.202000157
发表时间:
2020-10
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
作者:
Hu K;Li Y;Wu W;Xie L;Yan H;Cai Y;Chen D;Jiang Q;Lin L;Chen Z;Liao JY;Zhang Y;Koeffler HP;Yin D;Song E
通讯作者:
Song E
DOI:
10.3791/56265
发表时间:
2017-09-05
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Holton NW;Andrews JF;Gassman NR
通讯作者:
Gassman NR
影响因子:
2.9
作者:
Gibson, Bryan A.;Conrad, Lesley B.;Kraus, W. Lee
通讯作者:
Kraus, W. Lee
DOI:
10.1038/nrm.2017.53
发表时间:
2017-10
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
Ray Chaudhuri A;Nussenzweig A
通讯作者:
Nussenzweig A