ZFP281-BRCA2 prevents R-loop accumulation during DNA replication.

ZFP281-BRCA2 prevents R-loop accumulation during DNA replication.
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ZFP 281-BRCA 2可防止DNA复制过程中的R环积累。

DOI:
10.1038/s41467-022-31211-9
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发表时间:
2022-06-17
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
文献类型:
--
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R环在哺乳动物基因组中普遍存在,并参与许多基本的细胞过程。BRCA 2的消耗导致异常的R环积累,导致基因组不稳定。在这里,我们表明ZFP 281与BRCA 2合作,防止R环积累,以促进胚胎干细胞中的DNA复制。ZFP 281缺失降低染色质上的PCNA水平并损害DNA复制。从机制上讲,我们证明了ZFP 281可以与BRCA 2相互作用,BRCA 2在富含G/C的启动子处富集,并且需要ZFP 281和PRC 2以在全基因组范围内适当地招募到二价染色质。此外,ZFP 281或BRCA 2的缺失导致R环在二价区上的积累,并损害在干细胞分化期间视黄酸对发育基因的激活。总之,我们的研究结果表明,ZFP 281招募BRCA 2的二价染色质区域,以确保通过防止持久的R环DNA复制的适当进展。R环在哺乳动物基因组中普遍存在,并参与许多基本的细胞过程。在这里,Wang等人报道了ZFP 281与BRCA 2合作防止R环积累以促进胚胎干细胞中的DNA复制。
R-loops are prevalent in mammalian genomes and involved in many fundamental cellular processes. Depletion of BRCA2 leads to aberrant R-loop accumulation, contributing to genome instability. Here, we show that ZFP281 cooperates with BRCA2 in preventing R-loop accumulation to facilitate DNA replication in embryonic stem cells. ZFP281 depletion reduces PCNA levels on chromatin and impairs DNA replication. Mechanistically, we demonstrate that ZFP281 can interact with BRCA2, and that BRCA2 is enriched at G/C-rich promoters and requires both ZFP281 and PRC2 for its proper recruitment to the bivalent chromatin at the genome-wide scale. Furthermore, depletion of ZFP281 or BRCA2 leads to accumulation of R-loops over the bivalent regions, and compromises activation of the developmental genes by retinoic acid during stem cell differentiation. In summary, our results reveal that ZFP281 recruits BRCA2 to the bivalent chromatin regions to ensure proper progression of DNA replication through preventing persistent R-loops. R-loops are prevalent in mammalian genomes and involved in many fundamental cellular processes. Here, Wang et al. report that ZFP281 cooperates with BRCA2 in preventing R-loop accumulation to facilitate DNA replication in embryonic stem cells.
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