Nuclear m(6)A reader YTHDC1 regulates the scaffold function of LINE1 RNA in mouse ESCs and early embryos.

Nuclear m(6)A reader YTHDC1 regulates the scaffold function of LINE1 RNA in mouse ESCs and early embryos.
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核m~6A阅读器YTHDC1调节小鼠ESC和早期胚胎中LINE1 RNA的支架功能

DOI:
10.1007/s13238-021-00837-8
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发表时间:
2021-06
期刊:
影响因子:
21.1
通讯作者:
Gao S
Gao S
中科院分区:
生物学1区
文献类型:
--
作者:
Chen C;Liu W;Guo J;Liu Y;Liu X;Liu J;Dou X;Le R;Huang Y;Li C;Yang L;Kou X;Zhao Y;Wu Y;Chen J;Wang H;Shen B;Gao Y;Gao S

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染色体相关调控RNA(carRNAs,包括重复RNA)上的N6 - 甲基腺苷(m6A)在调节染色质状态和转录方面发挥重要作用,但其内在机制仍不清楚。在此,我们报道YTHDC1在小鼠胚胎干细胞(ESCs)的自我更新和分化潜能中发挥不可或缺的作用,这高度依赖于其m6A结合能力。Ythdc1是ESCs中足够的核糖体RNA(rRNA)合成以及抑制2 - 细胞(2C)转录程序所必需的,这重现了LINE1支架对转录组的调控。详细分析表明,YTHDC1识别细胞核中LINE1 RNA上的m6A,并调节LINE1 - NCL结合体的形成以及KAP1在染色质上的募集。此外,在Ythdc1缺失的ESCs和内细胞团(ICM)细胞中,2C相关逆转录转座子上H3K9me3的建立被中断,从而增加了转录活性。我们的研究揭示了m6A在调节RNA支架方面的作用,为RNA - 染色质相互作用提供了一种新模型。 网络版包含补充材料,可在10.1007/s13238 - 021 - 00837 - 8获取。
N6-methyladenosine (m6A) on chromosome-associated regulatory RNAs (carRNAs), including repeat RNAs, plays important roles in tuning the chromatin state and transcription, but the intrinsic mechanism remains unclear. Here, we report that YTHDC1 plays indispensable roles in the self-renewal and differentiation potency of mouse embryonic stem cells (ESCs), which highly depends on the m6A-binding ability. Ythdc1 is required for sufficient rRNA synthesis and repression of the 2-cell (2C) transcriptional program in ESCs, which recapitulates the transcriptome regulation by the LINE1 scaffold. Detailed analyses revealed that YTHDC1 recognizes m6A on LINE1 RNAs in the nucleus and regulates the formation of the LINE1-NCL partnership and the chromatin recruitment of KAP1. Moreover, the establishment of H3K9me3 on 2C-related retrotransposons is interrupted in Ythdc1-depleted ESCs and inner cell mass (ICM) cells, which consequently increases the transcriptional activities. Our study reveals a role of m6A in regulating the RNA scaffold, providing a new model for the RNA-chromatin cross-talk. The online version contains supplementary material available at 10.1007/s13238-021-00837-8.
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