Base-Resolution Mapping Reveals Distinct m(1)A Methylome in Nuclear- and Mitochondrial-Encoded Transcripts.
Base-Resolution Mapping Reveals Distinct m(1)A Methylome in Nuclear- and Mitochondrial-Encoded Transcripts.
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碱基分辨率作图揭示核和线粒体编码转录本中不同的 m1A 甲基化组
DOI:
10.1016/j.molcel.2017.10.019
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发表时间:
2017-12-07
期刊:
影响因子:
16
通讯作者:
Yi C
中科院分区:
文献类型:
--
作者:
Li X;Xiong X;Zhang M;Wang K;Chen Y;Zhou J;Mao Y;Lv J;Yi D;Chen XW;Wang C;Qian SB;Yi C
Gene expression can be post-transcriptionally regulated via dynamic and reversible RNA modifications. N1-methyladenosine (m1A) is a recently identified mRNA modification; however, little is known about its precise location and biogenesis. Here, we develop a base-resolution m1A profiling method, based on m1A-induced misincorporation during reverse transcription, and report distinct classes of m1A methylome in the human transcriptome. m1A in 5′-UTR, particularly those at the mRNA cap, associate with increased translation efficiency. A different, small subset of m1A exhibit a GUUCRA tRNA-like motif, are evenly distributed in the transcriptome and are dependent on the methyltransferase TRMT6/61A. Additionally, we show that m1A is prevalent in the mitochondrial-encoded transcripts. Manipulation of m1A level via TRMT61B, a mitochondria-localizing m1A methyltransferase, demonstrates that m1A in mitochondrial mRNA interferes with translation. Collectively, our approaches reveal distinct classes of m1A methylome and provide a resource for functional studies of m1A-mediated epitranscriptomic regulation. Li et al. developed a single-nucleotide-resolution technology, named “m1A-MAP”, to profile m1A in the human transcriptome, and revealed distinct classes of m1A methylome in nuclear- and mitochondrial-encoded transcripts.
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