PSIP1/LEDGF reduces R-loops at transcription sites to maintain genome integrity
PSIP1/LEDGF reduces R-loops at transcription sites to maintain genome integrity
复制标题
PSIP1/LEDGF 减少转录位点的 R 环以维持基因组完整性
DOI:
10.1101/2022.12.02.518862
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Jayakumar S
中科院分区:
文献类型:
--
作者:
Jayakumar S
R-loops that accumulate at transcription sites pose a persistent threat to genome integrity. PSIP1 is a chromatin protein associated with transcriptional elongation complex, possesses histone chaperone activity, and is implicated in recruiting RNA processing and DNA repair factors to transcription sites. Here, we show that PSIP1 interacts with R-loops and other proteins involved in R-loop homeostasis, including PARP1. Genome-wide mapping of PSIP1, R-loops and γ-H2AX in PSIP1-depleted human and mouse cell lines revealed an accumulation of R-loops and DNA damage at gene promoters in the absence of PSIP1. R-loop accumulation causes local transcriptional arrest and transcription-replication conflict, leading to DNA damage. PSIP1 depletion increases 53BP1 foci and reduces RAD51 foci, suggesting altered DNA repair choice. Furthermore, PSIP1 depletion increases the sensitivity of cancer cells to PARP1 inhibitors and DNA-damaging agents that induce R-loop-induced DNA damage. These findings provide insights into the mechanism through which PSIP1 maintains genome integrity at the site of transcription.
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影响因子:
3.9
作者:
van Nuland R;van Schaik FM;Simonis M;van Heesch S;Cuppen E;Boelens R;Timmers HM;van Ingen H
通讯作者:
van Ingen H
影响因子:
9
作者:
Bhargavan B;Fatma N;Chhunchha B;Singh V;Kubo E;Singh DP
通讯作者:
Singh DP
影响因子:
56.9
作者:
Schwalb, Bjorn;Michel, Margaux;Cramer, Patrick
通讯作者:
Cramer, Patrick
影响因子:
64.5
作者:
Hamperl S;Bocek MJ;Saldivar JC;Swigut T;Cimprich KA
通讯作者:
Cimprich KA
DOI:
10.1080/19491034.2015.1004952
发表时间:
2015
期刊:
Nucleus (Austin, Tex.)
影响因子:
--
作者:
Salvi JS;Mekhail K
通讯作者:
Mekhail K