綜述:R環穩態及其生理和病理作用
作者:
小柯機器人發布時間:2019/10/11 14:05:30
2019年10月10日,西班牙塞維亞大學Andrés Aguilera課題組在《細胞》在線發表綜述性論文,詳細介紹了R環從生理到病理的作用。
研究人員介紹,DNA-RNA雜合體在細胞過程中起著重要的生理作用,但其通常代表非固定的共轉錄結構,對轉錄,複製和DNA修復產生負面影響。 越來越多的證據表明,它們是構成複製壓力、DNA斷裂和基因組不穩定的來源。
相反,DNA斷裂通過釋放雙螺旋扭轉構象促進DNA-RNA雜合體的形成。 細胞通過直接預防或去除雜合體或通過DNA修復偶聯機制來避免DNA-RNA積累。
鑑於R環對染色質和基因組結構的影響及其與遺傳疾病的潛在關係,研究者回顧了R環穩態及其生理和病理作用。
附:英文原文
Title: R Loops: From Physiological to Pathological Roles
Author: Tatiana García-Muse, Andrés Aguilera
Issue&Volume: 10 October 2019
Abstract:
DNA-RNA hybrids play a physiological role in cellular processes, but often, they represent non-scheduled co-transcriptional structures with a negative impact on transcription, replication and DNA repair. Accumulating evidence suggests that they constitute a source of replication stress, DNA breaks and genome instability. Reciprocally, DNA breaks facilitate DNA-RNA hybrid formation by releasing the double helix torsional conformation. Cells avoid DNA-RNA accumulation by either preventing or removing hybrids directly or by DNA repair-coupled mechanisms. Given the R-loop impact on chromatin and genome organization and its potential relation with genetic diseases, we review R-loop homeostasis as well as their physiological and pathological roles.
DOI: 10.1016/j.cell.2019.08.055
Source: https://www.cell.com/cell/fulltext/S0092-8674(19)31006-2
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216