Journal
JOURNAL OF MOLECULAR BIOLOGY
Volume 432, Issue 6, Pages 1706-1717Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmb.2019.12.043
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Funding
- ANR (Agence National de la Recherche) [ANR-15-CE12-0012, ANR-18-CE92-0041]
- Agence Nationale de la Recherche (ANR) [ANR-15-CE12-0012, ANR-18-CE92-0041] Funding Source: Agence Nationale de la Recherche (ANR)
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In plants, DNA methylation occurs in distinct sequence contexts, including CG, CHG, and CHH. Thus, plants have developed a surprisingly diverse set of DNA methylation readers to cope with an extended repertoire of methylated sites. The Arabidopsis genome contains twelve Methyl-Binding Domain proteins (MBD), and nine SET and RING finger-associated (SRA) domain containing proteins belonging to the SUVH clade, in addition to three homologs of UHRF1, namely VIM1-3, all containing SRA domains. In this review, we will highlight several research questions that remain unresolved with respect to the function of plant DNA methylation readers, which can have both de novo demethylase and maintenance activity. We argue that maintenance of CG methylation in plants likely involved actors not found in their mammalian counterparts, and that new evidence suggests significant reprogramming of DNA methylation during plant reproduction as an important new development in the field. (C) 2020 Elsevier Ltd. All rights reserved.
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