N6-Methyladenosine modification of lincRNA 1281 is critically required for mESC differentiation potential.

N6-Methyladenosine modification of lincRNA 1281 is critically required for mESC differentiation potential.
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lincRNA 1281 的 N-6-甲基腺苷修饰对于 mESC 分化潜力至关重要

DOI:
10.1093/nar/gky130
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发表时间:
2018-05-04
影响因子:
14.9
通讯作者:
Kang J
Kang J
中科院分区:
生物学2区
文献类型:
--
作者:
Yang D;Qiao J;Wang G;Lan Y;Li G;Guo X;Xi J;Ye D;Zhu S;Chen W;Jia W;Leng Y;Wan X;Kang J

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以往的研究已经揭示了N6-甲基腺苷(M6A)修饰在胚胎干细胞(ESCs)中的关键作用,但M6A在大基因间非编码RNA(LincRNA)中的生物学功能尚不清楚。在这里,我们证明了linc1281的内部m6A修饰介导了一个竞争的内源RNA(Cerna)模型来调节小鼠胚胎干细胞(MESC)的分化。我们证明了linc1281的缺失影响了mESC的分化,并且m6A在linc1281转录本中高度丰富。带有RRACU m6A序列基序的Linc1281,而不是m6A缺失突变体,恢复了linc1281缺失的mESCs的表型。机制分析表明,linc1281通过隔离多能性相关的let-7家族microRNAs(MiRNAs)来确保mESC的同一性,并且这种RNA-RNA相互作用是m6A依赖的。总之,这些发现阐明了linc1281及其m6A修饰在mESCs中的功能作用,并确定了一种新的RNA调控机制,为进一步探索广泛的RNA表观遗传调控模式提供了基础。
Previous studies have revealed the critical roles of N6-methyladenosine (m6A) modification of mRNA in embryonic stem cells (ESCs), but the biological function of m6A in large intergenic noncoding RNA (lincRNA) is unknown. Here, we showed that the internal m6A modification of linc1281 mediates a competing endogenous RNA (ceRNA) model to regulate mouse ESC (mESC) differentiation. We demonstrated that loss of linc1281 compromises mESC differentiation and that m6A is highly enriched within linc1281 transcripts. Linc1281 with RRACU m6A sequence motifs, but not an m6A-deficient mutant, restored the phenotype in linc1281-depleted mESCs. Mechanistic analyses revealed that linc1281 ensures mESC identity by sequestering pluripotency-related let-7 family microRNAs (miRNAs), and this RNA-RNA interaction is m6A dependent. Collectively, these findings elucidated the functional roles of linc1281 and its m6A modification in mESCs and identified a novel RNA regulatory mechanism, providing a basis for further exploration of broad RNA epigenetic regulatory patterns.
n(6) - 甲基腺苷依赖性RNA结构开关调节RNA蛋白质相互作用。
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