From A to m6A: The Emerging Viral Epitranscriptome

There are over 100 different chemical RNA modifications, collectively known as the epitranscriptome. N-6-methyladenosine (m(6)A) is the most commonly found internal RNA modification in cellular mRNAs where it plays important roles in the regulation of the mRNA structure, stability, translation and nuclear export. This modification is also found in viral RNA genomes and in viral mRNAs derived from both RNA and DNA viruses. A growing body of evidence indicates that m(6)A modifications play important roles in regulating viral replication by interacting with the cellular m(6)A machinery. In this review, we will exhaustively detail the current knowledge on m(6)A modification, with an emphasis on its function in virus biology.