A programmable system to methylate and demethylate N(6)-methyladenosine (m(6)A) on specific RNA transcripts in mammalian cells.

A programmable system to methylate and demethylate N(6)-methyladenosine (m(6)A) on specific RNA transcripts in mammalian cells.
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哺乳动物细胞中特定RNA转录物的甲基化和去甲基化N(6)-甲基腺苷(m(6)A)的可编程系统。

DOI:
10.1016/j.jbc.2022.102525
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发表时间:
2022-11
影响因子:
4.8
通讯作者:
Hutchins, Andrew P.
Hutchins, Andrew P.
中科院分区:
生物学2区
文献类型:
--
作者:
Chang, Chen;Ma, Gang;Cheung, Edwin;Hutchins, Andrew P.

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RNA n6 -甲基腺苷(m6A)是最丰富的内部mRNA修饰,是调节RNA功能的表转录组系统的一部分。m6A被特定的酶可逆催化,这些修饰可以被rna结合蛋白识别,进而调节生物过程。尽管有许多报道表明m6A参与了关键的生物学功能,但这一探索主要是通过对m6A的写入、擦除或读取器的全局KO或敲除来进行的。因此,缺乏关于m6A在生物过程中对单转录物的作用的信息,这对理解m6A的生物学功能提出了挑战。在这里,我们展示了一种基于CRISPR/ dcas13的RNA m6A编辑器,它可以使用单个或多个CRISPR RNA阵列靶向RNA,使人类293T细胞和小鼠胚胎干细胞中的m6A甲基化或去甲基化。我们系统地分析了它的能力,以实现m6A动力学的靶向重写,包括对环状RNA翻译和转录物半衰期的调节。最后,我们利用该系统特异性调节非编码XIST (X-inactive specific transcript)上的m6A水平,以调节X染色体的沉默和激活。这里描述的编辑器可用于探索m6A在生物过程中的作用。
RNA N6-methyladenosine (m6A) is the most abundant internal mRNA modification and forms part of an epitranscriptomic system that modulates RNA function. m6A is reversibly catalyzed by specific enzymes, and those modifications can be recognized by RNA-binding proteins that in turn regulate biological processes. Although there are many reports demonstrating m6A participation in critical biological functions, this exploration has mainly been conducted through the global KO or knockdown of the writers, erasers, or readers of m6A. Consequently, there is a lack of information about the role of m6A on single transcripts in biological processes, posing a challenge in understanding the biological functions of m6A. Here, we demonstrate a CRISPR/dCas13a-based RNA m6A editors, which can target RNAs using a single or multiple CRISPR RNA array to methylate or demethylate m6A in human 293T cells and mouse embryonic stem cells. We systematically assay its capabilities to enable the targeted rewriting of m6A dynamics, including modulation of circular RNA translation and transcript half-life. Finally, we use the system to specifically modulate m6A levels on the noncoding XIST (X-inactive specific transcript) to modulate X chromosome silencing and activation. The editors described here can be used to explore the roles of m6A in biological processes.
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发表时间: 2010-04-22
期刊: NATURE
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发表时间: 2016-08-05
期刊: Science (New York, N.Y.)
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DOI: 10.1038/nature19802
发表时间: 2016-10-13
期刊: Nature
影响因子: 64.8
作者:
East-Seletsky A;O'Connell MR;Knight SC;Burstein D;Cate JH;Tjian R;Doudna JA
通讯作者: Doudna JA
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DOI: 10.1074/jbc.m113.546168
发表时间: 2014-04-25
影响因子: 4.8
作者:
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通讯作者: Chen, Zhongzhou
DOI: 10.1016/j.tibs.2016.12.004
发表时间: 2017-02
影响因子: 13.8
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通讯作者: Kalantry S