RNA methyltransferase METTL16: Targets and function.
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TLDR
The N6-methyladenosine (m6A) RNA methyltransferase METTL16 is an emerging player in the RNA modification landscape of the human cell and has been shown to bind and methylate the MAT2A messenger RNA (mRNA) and U6 small nuclear RNA (snRNA) as discussed by the authors.Abstract:
The N6-methyladenosine (m6A) RNA methyltransferase METTL16 is an emerging player in the RNA modification landscape of the human cell. Originally thought to be a ribosomal RNA methyltransferase, it has now been shown to bind and methylate the MAT2A messenger RNA (mRNA) and U6 small nuclear RNA (snRNA). It has also been shown to bind the MALAT1 long noncoding RNA and several other RNAs. METTL16's methyltransferase domain contains the Rossmann-like fold of class I methyltransferases and uses S-adenosylmethionine (SAM) as the methyl donor. It has an RNA methylation consensus sequence of UACAGARAA (modified A underlined), and structural requirements for its known RNA interactors. In addition to the methyltransferase domain, METTL16 protein has two other RNA binding domains, one of which resides in a vertebrate conserved region, and a putative nuclear localization signal. The role of METTL16 in the cell is still being explored, however evidence suggests it is essential for most cells. This is currently hypothesized to be due to its role in regulating the splicing of MAT2A mRNA in response to cellular SAM levels. However, one of the more pressing questions remaining is what role METTL16's methylation of U6 snRNA plays in splicing and potentially cellular survival. METTL16 also has several other putative coding and noncoding RNA interactors but the definitive methylation status of those RNAs and the role METTL16 plays in their life cycle is yet to be determined. Overall, METTL16 is an intriguing RNA binding protein and methyltransferase whose important functions in the cell are just beginning to be understood. This article is categorized under: RNA Processing > RNA Editing and Modification RNA Interactions with Proteins and Other Molecules > RNA-Protein Complexes.read more
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TL;DR: A method is presented for transcriptome-wide m(6)A localization, which combines m( 6)A-specific methylated RNA immunoprecipitation with next-generation sequencing (MeRIP-Seq) and reveals insights into the epigenetic regulation of the mammalian transcriptome.
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N6-methyladenosine-dependent regulation of messenger RNA stability
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TL;DR: It is shown that m6A is selectively recognized by the human YTH domain family 2 (YTHDF2) ‘reader’ protein to regulate mRNA degradation and established the role of YTH DF2 in RNA metabolism, showing that binding of Y THDF2 results in the localization of bound mRNA from the translatable pool to mRNA decay sites, such as processing bodies.
Journal ArticleDOI
N6-methyladenosine Modulates Messenger RNA Translation Efficiency
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TL;DR: In a unified mechanism of m(6)A-based regulation in the cytoplasm, YTHDF2-mediated degradation controls the lifetime of target transcripts, whereasYTHDF1-mediated translation promotion increases translation efficiency, ensuring effective protein production from dynamic transcripts that are marked by m( 6)A.
Journal ArticleDOI
A METTL3-METTL14 complex mediates mammalian nuclear RNA N6-adenosine methylation
Jianzhao Liu,Yanan Yue,Dali Han,Xiao Wang,Ye Fu,Liang Zhang,Guifang Jia,Miao Yu,Zhike Lu,Xin Deng,Qing Dai,Weizhong Chen,Chuan He +12 more
TL;DR: It is reported here that human METTL14 catalyzes m6A RNA methylation, and together with METTL3, the only previously known m 6A methyltransferase, these two proteins form a stable heterodimer core complex ofMETTL3-14 that functions in cellular m6 a deposition on mammalian nuclear RNAs.
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