Global Co-regulatory Cross Talk Between mA and mC RNA Methylation Systems Coordinate Cellular Responses and Brain Disease Pathways.

N6 adenosine and C5 cytosine modification of mRNAs, tRNAs and rRNAs are regulated by the behaviour of distinct sets of writer, reader and eraser effector proteins which are conventionally considered to function independently. Here, we provide evidence of global cross-regulatory and functional interaction between the mA and mC RNA methylation systems. We first show that mA and mC effector protein transcripts are subject to reciprocal base modification supporting the existence of co-regulatory post-transcriptional feedback loops.