m6A and YTHDF proteins contribute to the localization of select neuronal mRNAs.

m6A and YTHDF proteins contribute to the localization of select neuronal mRNAs.
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DOI:
10.1093/nar/gkac251
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发表时间:
2022-05-06
影响因子:
14.9
通讯作者:
Meyer, Kate D.
Meyer, Kate D.
中科院分区:
生物学2区
文献类型:
--
作者:
Flamand, Mathieu N.;Meyer, Kate D.

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mrna向远端亚细胞区室的转运是神经元空间基因表达控制的重要组成部分。然而,控制神经元中mRNA定位的机制尚不完全清楚。在这里,我们确定了丰富的碱基修饰,m6A,作为这个过程的一个新的调节器。m6A基因缺失后的转录组分析显示,海马神经元中有数百个转录本表现出亚细胞定位的改变。此外,使用报告系统,我们发现在选择的神经元转录物中特定m6A位点的突变减少了它们在神经突的定位。单分子荧光原位杂交实验进一步证实了我们的发现,并鉴定出m6A解读蛋白YTHDF2和YTHDF3是这种作用的介质。我们的研究结果揭示了m6A在控制神经元mRNA定位方面的新功能,并使我们能够更好地理解m6A影响大脑基因表达的机制。
The transport of mRNAs to distal subcellular compartments is an important component of spatial gene expression control in neurons. However, the mechanisms that control mRNA localization in neurons are not completely understood. Here, we identify the abundant base modification, m6A, as a novel regulator of this process. Transcriptome-wide analysis following genetic loss of m6A reveals hundreds of transcripts that exhibit altered subcellular localization in hippocampal neurons. Additionally, using a reporter system, we show that mutation of specific m6A sites in select neuronal transcripts diminishes their localization to neurites. Single molecule fluorescent in situ hybridization experiments further confirm our findings and identify the m6A reader proteins YTHDF2 and YTHDF3 as mediators of this effect. Our findings reveal a novel function for m6A in controlling mRNA localization in neurons and enable a better understanding of the mechanisms through which m6A influences gene expression in the brain.
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