期刊
DNA REPAIR
卷 81, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.dnarep.2019.102661
关键词
DNA double-strand break repair; RNA:DNA hybrid; R-loop; G-quadruplex; Transcription; Chromatin
资金
- NIH National Cancer Institute [CA198279, CA201268]
- American Cancer Society [RSG-16-042-01]
- European Research Council [ERC-2014-CoG 647344]
- Agence Nationale pour la Recherche [ANR-14-CE10-0002-01, ANR-13-BSV8-0013]
- Institut National contre le Cancer (INCA)
- Ligue Nationale contre le Cancer (LNCC)
Although long overlooked, it is now well understood that DNA does not systematically assemble into a canonical double helix, known as B-DNA, throughout the entire genome but can also accommodate other structures including DNA hairpins, G-quadruplexes and RNA:DNA hybrids. Notably, these non-canonical DNA structures form preferentially at transcriptionally active loci. Acting as replication roadblocks and being targeted by multiple machineries, these structures weaken the genome and render it prone to damage, including DNA double-strand breaks (DSB). In addition, secondary structures also further accumulate upon DSB formation. Here we discuss the potential functions of pre-existing or de novo formed nucleic acid structures, as bona fide repair intermediates or repair roadblocks, especially during Transcription-Coupled DNA Double-Strand Break repair (TC-DSBR), and provide an update on the specialized protein complexes displaying the ability to remove these structures to safeguard genome integrity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据