Gene body DNA methylation in plants

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The type, amount, and location of DNA methylation within a gene provides pivotal information on the enzymatic pathway by which it was achieved and its functional consequences. In plants (angiosperms specifically), gene body methylation (gbM) refers to genes with an enrichment of CG DNA methylation within the transcribed regions and depletion at the transcriptional start and termination sites. GbM genes often compose the bulk of methylated genes within angiosperm genomes and are enriched for housekeeping functions. Contrary to the transcriptionally repressive effects of other chromatin modifications within gene bodies, gbM genes are constitutively expressed. GbM has intrigued researchers since its discovery, and much effort has been placed on identifying its functional role. Here, we highlight the recent findings on the evolutionary origin and molecular mechanism of gbM and synthesize studies describing the possible roles for this enigmatic epigenetic phenotype.




Bewick, A. J., & Schmitz, R. J. (2017, April 1). Gene body DNA methylation in plants. Current Opinion in Plant Biology. Elsevier Ltd.

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