R-loop resolution promotes co-transcriptional chromatin silencing.
R-loop resolution promotes co-transcriptional chromatin silencing.
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DOI:
10.1038/s41467-021-22083-6
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发表时间:
2021-03-19
影响因子:
16.6
通讯作者:
Dean C
中科院分区:
文献类型:
--
作者:
Xu C;Wu Z;Duan HC;Fang X;Jia G;Dean C
RNA-mediated chromatin silencing is central to genome regulation in many organisms. However, how nascent non-coding transcripts regulate chromatin is poorly understood. Here, through analysis of Arabidopsis FLC, we show that resolution of a nascent-transcript-induced R-loop promotes chromatin silencing. Stabilization of an antisense-induced R-loop at the 3′ end of FLC enables an RNA binding protein FCA, with its direct partner FY/WDR33 and other 3′-end processing factors, to polyadenylate the nascent antisense transcript. This clears the R-loop and recruits the chromatin modifiers demethylating H3K4me1. FCA immunoprecipitates with components of the m6A writer complex, and m6A modification affects dynamics of FCA nuclear condensates, and promotes FLC chromatin silencing. This mechanism also targets other loci in the Arabidopsis genome, and consistent with this fca and fy are hypersensitive to a DNA damage-inducing drug. These results show how modulation of R-loop stability by co-transcriptional RNA processing can trigger chromatin silencing. Nascent non-coding RNA can mediate chromatin silencing, however mechanistically this process is poorly understood. Here the authors show that resolution of an R-loop during 3'-end processing of a plant antisense transcript recruits chromatin modifiers to promote chromatin silencing.
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DOI:
10.1016/j.tig.2016.10.002
发表时间:
2016-12
期刊:
Trends in genetics : TIG
影响因子:
--
作者:
Chédin F
通讯作者:
Chédin F
影响因子:
64.5
作者:
Li, XL;Manley, JL
通讯作者:
Manley, JL
影响因子:
64.5
作者:
Macknight, R;Bancroft, I;Dean, C
通讯作者:
Dean, C
影响因子:
64.8
作者:
Huang, Huilin;Weng, Hengyou;Chen, Jianjun
通讯作者:
Chen, Jianjun
影响因子:
10.5
作者:
Herrera-Moyano E;Mergui X;García-Rubio ML;Barroso S;Aguilera A
通讯作者:
Aguilera A