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The anti-DNA methylation mark histone H3 lysine 4 methylation recruits DNA demethylases in Arabidopsis [WGBS, BS-PCR-seq]

ABSTRACT: The anti-DNA methylation mark histone H3 lysine 4 methylation recruits DNA demethylases in Arabidopsis [WGBS, BS-PCR-seq]

PROVIDER: PRJNA1030748 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26457800_1.fastq.gz	Fastqsanger.gz
	SRR26457800_2.fastq.gz	Fastqsanger.gz
	SRR26457801_1.fastq.gz	Fastqsanger.gz
	SRR26457801_2.fastq.gz	Fastqsanger.gz
	SRR26457802_1.fastq.gz	Fastqsanger.gz

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The anti-DNA methylation mark histone H3 lysine 4 methylation recruits DNA demethylases in Arabidopsis [ChIP-seq]

Project description:The anti-DNA methylation mark histone H3 lysine 4 methylation recruits DNA demethylases in Arabidopsis [ChIP-seq]

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The anti-DNA methylation mark histone H3 lysine 4 methylation recruits DNA demethylases in Arabidopsis [WGBS, BS-PCR-seq]

Project description:Patterning of DNA methylation in eukaryotic genomes is shaped by de novo methylation, maintenance mechanisms, and demethylation pathways, but how these processes interface with epigenetic modification of histones is poorly understood. We found that the targeting of histone H3 lysine four trimethylation (H3K4me3) with the catalytic domain of the SDG2 histone methyltransferase potently erased DNA methylation and gene silencing at FWA and other genes, and also erased CG DNA methylation in the transcribed region of genes. This methylation erasure was completely blocked in the ros1 dml2 dml3 triple mutant which eliminates DNA demethylation enzymes, showing that H3K4me3 promotes the active removal of DNA methylation rather than preventing CG methylation maintenance. We also found that targeting the removal of H3K4me3 with the novel protein TRBIP1, which acts in part by recruiting the H3K4me3 demethylase JMJ14, causes potent gene silencing. Furthermore, using a CRISPR-based system to simultaneously target both TRBIP1 and a CG specific DNA methyltransferase, we observed more potent establishment of DNA methylation and gene silencing than targeting the DNA methyltransferase by itself. These results highlight H3K4me3 as a potent anti-DNA methylation mark, and reveal potent and specific tools for epigenome engineering.

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Histone H3 lysine 4 methylation recruits DNA demethylases to enforce gene expression in Arabidopsis.

Project description:Patterning of DNA methylation in eukaryotic genomes is controlled by de novo methylation, maintenance mechanisms and demethylation pathways. In Arabidopsis thaliana, DNA demethylation enzymes are clearly important for shaping methylation patterns, but how they are regulated is poorly understood. Here we show that the targeting of histone H3 lysine four trimethylation (H3K4me3) with the catalytic domain of the SDG2 histone methyltransferase potently erased DNA methylation and gene silencing at FWA and also erased CG DNA methylation in many other regions of the Arabidopsis genome. This methylation erasure was completely blocked in the ros1 dml2 dml3 triple mutant lacking DNA demethylation enzymes, showing that H3K4me3 promotes the active removal of DNA methylation. Conversely, we found that the targeted removal of H3K4me3 increased the efficiency of targeted DNA methylation. These results highlight H3K4me3 as a potent anti-DNA methylation mark and also pave the way for development of more powerful epigenome engineering tools.

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