N6-adenosine-methyltransferase 70 kDa subunit (METTL3) is an enzyme that in humans is encoded by the METTL3 gene. This enzyme is involved in the post-transcriptional methylation of internal adenosine residues in eukaryotic mRNAs, forming N6-methyladenosine (m6A). METTL3 forms the m6 a methyltransferase complex with METTL14 and WTP and is responsible for a majority of the m6a modifications of mRNA. METTL3 is expressed in a variety of normal tissues, such as the lymphoid, testis, prostate and fallopian tube tissues. The enzyme is also responsible for mechanisms related to tumor development, RNA stability and maturation, and has suggested roles in ensuring animal survival.
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