Figure 3. m6A affects mouse embryonic stem cell differentiation.
The N6-methyl-adenosine (m6A) methyltransferase METTL3 (methyltransferase-like 3) is required for the transition of mouse embryonic stem cells (mouse ES cells) from a naive to the more differentiated primed state. During this process, the key pluripotency factor transcripts POU domain, class 5, transcription factor 1(Pou5f1), Krueppel-like factor 4 (Klf4) and Sox2 must be cleared. In mouse ES cells lacking Mettl3, this clearance is defective because non-methylated mRNAs are less subjected to decay, which prevents the establishment of a differentiated transcriptome required to achieve a primed mouse ES cell state.