Methylation of Structured RNA by the m(6)A Writer METTL16 Is Essential for Mouse Embryonic Development - Archive ouverte HAL
Article Dans Une Revue Molecular Cell Année : 2018

Methylation of Structured RNA by the m(6)A Writer METTL16 Is Essential for Mouse Embryonic Development

Résumé

Internal modification of RNAs with N-6-methyladenosine (m(6)A) is a highly conserved means of gene expression control. While the METTL3/METTL14 heterodimer adds this mark on thousands of transcripts in a single-stranded context, the substrate requirements and physiological roles of the second m(6)A writer METTL16 remain unknown. Here we describe the crystal structure of human METTL16 to reveal a methyltransferase domain furnished with an extra N-terminal module, which together form a deep-cut groove that is essential for RNA binding. When presented with a random pool of RNAs, METTL16 selects for methylation-structured RNAs where the critical adenosine is present in a bulge. Mouse 16-cell embryos lacking MeTTL16 display reduced mRNA levels of its methylation target, the SAM synthetase Mat2a. The consequence is massive transcriptome dysregulation in similar to 64-cell blastocysts that are unfit for further development. This highlights the role of an m(6)A RNA methyltransferase in facilitating early development via regulation of SAM availability.
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Dates et versions

hal-02976314 , version 1 (23-10-2020)

Identifiants

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Mateusz Mendel, Kuan-Ming Chen, David Homolka, Pascal Gos, Radha Raman Pandey, et al.. Methylation of Structured RNA by the m(6)A Writer METTL16 Is Essential for Mouse Embryonic Development. Molecular Cell, 2018, 71 (6), pp.986-1000. ⟨10.1016/j.molcel.2018.08.004⟩. ⟨hal-02976314⟩
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