Review Article

N6-Methyladenosine in RNA and DNA: An Epitranscriptomic and Epigenetic Player Implicated in Determination of Stem Cell Fate

Table 2

Distribution of the methylated adenosine in DNA and RNA.

SpeciesDNA m6dA distributionFunctions

D. melanogasterTransposons, intergenic regions, nucleosomal biased, preferential for repeat sequencesPromotion of transposon expression
Repression of many genes involved in CNS functions
Promote GSC differentiation

C. reinhardtiiTSS of more than 14,000 genes activelyMainly promote gene transcription
Linker DNA biased
Intergenic regions

C. elegansNo preference in the genomeMainly promote gene transcription
Nucleosomal biased

T. thermophilus5 end of the gene bodyEnhance transcription of the genes bearing m6dA sites
AT motif of the linker DNA regions flanked by nucleosomes particularly
H2A.Z-containing nucleosomes associated with Pol II-transcribed genes

Danio rerioPreferential for repeat sequences

Xenio laevisDepleted at TSSs

Mus musculusDepleted at TSSs, enriched on LINE-1 in ESCEpigenetic silencing of LINE-1 and surrounding
Varies in accordance with physiological conditionsEnhancers and genes
Involved in ESC self-renewal and differentiation

Homo sapiensDepleted at TSSs, enriched on LINE-1Similar to mouse

SpeciesRNA m6ABiological functions
Mammals5UTR and 3UTRRegulation of gene expression
Stop codonRNA metabolism including mRNA, rRNA, tRNA, miRNA, snoRNA, and circRNA
Low abundance in coding regions long introns
Determination of cell fate