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Three distinct 3-methylcytidine (m3C) methyltransferases modify tRNA and mRNA in mice and humans

Xu, Luang ; Liu, Xinyu ; Sheng, Na ; Oo, Kyaw Soe ; Liang, Junxin ; Chionh, Yok Hian ; Xu, Juan ; Ye, Fuzhou ; Gao, Yong-Gui ; Dedon, Peter C. ; Fu, Xin-Yuan

The Journal of biological chemistry, 2017-09, Vol.292 (35), p.14695-14703 [Periódico revisado por pares]

United States: Elsevier Inc

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Título:
Three distinct 3-methylcytidine (m3C) methyltransferases modify tRNA and mRNA in mice and humans
Autor: Xu, Luang ; Liu, Xinyu ; Sheng, Na ; Oo, Kyaw Soe ; Liang, Junxin ; Chionh, Yok Hian ; Xu, Juan ; Ye, Fuzhou ; Gao, Yong-Gui ; Dedon, Peter C. ; Fu, Xin-Yuan
Assuntos: Animals ; Cell Line ; Cytidine - analogs & derivatives ; Cytidine - metabolism ; Editors' Picks ; human ; Humans ; Isoenzymes - genetics ; Isoenzymes - metabolism ; Liver - enzymology ; Liver - metabolism ; m3C ; Methylation ; Methyltransferases - antagonists & inhibitors ; Methyltransferases - chemistry ; Methyltransferases - genetics ; Methyltransferases - metabolism ; Mettl2 ; Mettl6 ; Mettl8 ; Mice ; Mice, Knockout ; Mice, Mutant Strains ; mouse ; mRNA ; Mutation ; Recombinant Fusion Proteins - chemistry ; Recombinant Fusion Proteins - metabolism ; RNA Interference ; RNA methyltransferase ; RNA Processing, Post-Transcriptional ; RNA, Messenger - metabolism ; RNA, Transfer - metabolism ; RNA, Transfer, Arg - metabolism ; RNA, Transfer, Ser - metabolism ; RNA, Transfer, Thr - metabolism ; Serine-tRNA Ligase - chemistry ; Serine-tRNA Ligase - metabolism ; Substrate Specificity ; transfer RNA (tRNA)
É parte de: The Journal of biological chemistry, 2017-09, Vol.292 (35), p.14695-14703
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Edited by Xiao-Fan Wang
Both authors contributed equally to this work.
Descrição: Chemical RNA modifications are central features of epitranscriptomics, highlighted by the discovery of modified ribonucleosides in mRNA and exemplified by the critical roles of RNA modifications in normal physiology and disease. Despite a resurgent interest in these modifications, the biochemistry of 3-methylcytidine (m3C) formation in mammalian RNAs is still poorly understood. However, the recent discovery of trm141 as the second gene responsible for m3C presence in RNA in fission yeast raises the possibility that multiple enzymes are involved in m3C formation in mammals as well. Here, we report the discovery and characterization of three distinct m3C-contributing enzymes in mice and humans. We found that methyltransferase-like (METTL) 2 and 6 contribute m3C in specific tRNAs and that METTL8 only contributes m3C to mRNA. MS analysis revealed that there is an ∼30–40% and ∼10–15% reduction, respectively, in METTL2 and -6 null-mutant cells, of m3C in total tRNA, and primer extension analysis located METTL2-modified m3C at position 32 of tRNAThr isoacceptors and tRNAArg(CCU). We also noted that METTL6 interacts with seryl-tRNA synthetase in an RNA-dependent manner, suggesting a role for METTL6 in modifying serine tRNA isoacceptors. METTL8, however, modified only mRNA, as determined by biochemical and genetic analyses in Mettl8 null-mutant mice and two human METTL8 mutant cell lines. Our findings provide the first evidence of the existence of m3C modification in mRNA, and the discovery of METTL8 as an mRNA m3C writer enzyme opens the door to future studies of other m3C epitranscriptomic reader and eraser functions.
Editor: United States: Elsevier Inc
Idioma: Inglês

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Three distinct 3-methylcytidine (m3C) methyltransferases modify tRNA and mRNA in mice and humans

Xu, Luang ; Liu, Xinyu ; Sheng, Na ; Oo, Kyaw Soe ; Liang, Junxin ; Chionh, Yok Hian ; Xu, Juan ; Ye, Fuzhou ; Gao, Yong-Gui ; Dedon, Peter C. ; Fu, Xin-Yuan

United States: Elsevier Inc

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