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. 2019 Sep 27;20(19):4814. doi: 10.3390/ijms20194814

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Roles of replicative DNA polymerases in the maintenance of epigenetic information. In addition to replicating DNA, the three plant replicative DNA Pols are involved in the replication of chromatin marks. (A) During DNA replication, chromatin is disrupted ahead of the replication fork, and the epigenetic information must be restored behind the fork, in order for chromatin marks to be inherited through DNA replication. (B) Hypomorphic mutants for replicative DNA polymerases showing early flowering caused by de-repression of flowering genes, due to defects in the maintenance of the inhibitory histone marks H3K27me for mutants of three polymerases [38,39,40,41,43,48,52,53]. In addition, loss of Pol δ mutants also affects the active H3K4me mark [40].