DNA demethylation in the Arabidopsis genome

Penterman J, ZILBERMAN D, Huh JH, Ballinger T, Henikoff S, Fischer RL. 2007. DNA demethylation in the Arabidopsis genome. Proceedings of the National Academy of Sciences. 104(16), 6752–6757.


Journal Article | Published | English

Scopus indexed
Author
Penterman, Jon; ZILBERMAN, DanielIST Austria; Huh, Jin Hoe; Ballinger, Tracy; Henikoff, Steven; Fischer, Robert L.
Abstract
Cytosine DNA methylation is considered to be a stable epigenetic mark, but active demethylation has been observed in both plants and animals. In Arabidopsis thaliana, DNA glycosylases of the DEMETER (DME) family remove methylcytosines from DNA. Demethylation by DME is necessary for genomic imprinting, and demethylation by a related protein, REPRESSOR OF SILENCING1, prevents gene silencing in a transgenic background. However, the extent and function of demethylation by DEMETER-LIKE (DML) proteins in WT plants is not known. Using genome-tiling microarrays, we mapped DNA methylation in mutant and WT plants and identified 179 loci actively demethylated by DML enzymes. Mutations in DML genes lead to locus-specific DNA hypermethylation. Reintroducing WT DML genes restores most loci to the normal pattern of methylation, although at some loci, hypermethylated epialleles persist. Of loci demethylated by DML enzymes, >80% are near or overlap genes. Genic demethylation by DML enzymes primarily occurs at the 5′ and 3′ ends, a pattern opposite to the overall distribution of WT DNA methylation. Our results show that demethylation by DML DNA glycosylases edits the patterns of DNA methylation within the Arabidopsis genome to protect genes from potentially deleterious methylation.
Publishing Year
Date Published
2007-04-17
Journal Title
Proceedings of the National Academy of Sciences
Volume
104
Issue
16
Page
6752-6757
ISSN
eISSN
IST-REx-ID

Cite this

Penterman J, ZILBERMAN D, Huh JH, Ballinger T, Henikoff S, Fischer RL. DNA demethylation in the Arabidopsis genome. Proceedings of the National Academy of Sciences. 2007;104(16):6752-6757. doi:10.1073/pnas.0701861104
Penterman, J., ZILBERMAN, D., Huh, J. H., Ballinger, T., Henikoff, S., & Fischer, R. L. (2007). DNA demethylation in the Arabidopsis genome. Proceedings of the National Academy of Sciences. National Academy of Sciences. https://doi.org/10.1073/pnas.0701861104
Penterman, Jon, Daniel ZILBERMAN, Jin Hoe Huh, Tracy Ballinger, Steven Henikoff, and Robert L. Fischer. “DNA Demethylation in the Arabidopsis Genome.” Proceedings of the National Academy of Sciences. National Academy of Sciences, 2007. https://doi.org/10.1073/pnas.0701861104.
J. Penterman, D. ZILBERMAN, J. H. Huh, T. Ballinger, S. Henikoff, and R. L. Fischer, “DNA demethylation in the Arabidopsis genome,” Proceedings of the National Academy of Sciences, vol. 104, no. 16. National Academy of Sciences, pp. 6752–6757, 2007.
Penterman J, ZILBERMAN D, Huh JH, Ballinger T, Henikoff S, Fischer RL. 2007. DNA demethylation in the Arabidopsis genome. Proceedings of the National Academy of Sciences. 104(16), 6752–6757.
Penterman, Jon, et al. “DNA Demethylation in the Arabidopsis Genome.” Proceedings of the National Academy of Sciences, vol. 104, no. 16, National Academy of Sciences, 2007, pp. 6752–57, doi:10.1073/pnas.0701861104.
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