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Arabidopsis thaliana

ABSTRACT: Genome-wide analysis reveals CLF-regulated transcripts in Arabidopsis

PROVIDER: PRJNA188296 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR656215.fastq.gz	Fastqsanger.gz
	SRR656216.fastq.gz	Fastqsanger.gz
	SRR656217.fastq.gz	Fastqsanger.gz
	SRR656218.fastq.gz	Fastqsanger.gz
	SRR656219.fastq.gz	Fastqsanger.gz

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Identification of CLF-regulated transcripts using strand-specific RNA-sequencing in Arabidopsis

Project description:CURLY LEAF (CLF), the major histone methyltransferase of Polycomb Repressive Complex 2 (PRC2), modifies trimethylation of histone H3 lysine 27 (H3K27me3) and mediates dynamical chromatin repression in Arabidopsis. Here we used strand specific RNA-sequencing to profile Arabidopsis transcriptomes obtained from roots, shoots, flowers and siliques of Col-0 and clf-28 plants. Our analysis identified a large number of CLF-regulatedd transcripts in Arabidopsis.

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Genome-wide analysis reveals CLF-regulated transcripts in Arabidopsis

Project description:CURLY LEAF (CLF), the major histone methyltransferase of Polycomb Repressive Complex 2 (PRC2), modifies trimethylation of histone H3 lysine 27 (H3K27me3) and mediates dynamical chromatin repression in Arabidopsis. Here we profiled Arabidopsis transcriptomes obtained from roots, leaves, flowers and siliques of Col-0 and clf-28 plants using RNA-seq. Our analysis uncovered 3835 transcription units were up-regulated in clf-28. Compared with H3K27me3 ChIP-CHIP data, we found at least 42% of them were associated with H3K27me3.

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Genome-wide occupancy of histone H3K27 methyltransferases CURLY LEAF and SWINGER in Arabidopsis seedlings

Project description:The Polycomb Group (PcG) proteins form two protein complexes, PcG Repressive Complex 1 (PRC1) and PRC2, which are key epigenetic regulators in eukaryotes. PRC2 represses gene expression by catalyzing the trimethylation of histone H3 lysine 27 (H3K27me3). In Arabidopsis (Arabidopsis thaliana), CURLY LEAF (CLF) and SWINGER (SWN) are two major H3K27 methyltransferases and core components of PRC2, playing essential roles in plant growth and development. Despite their importance, genome-wide binding profiles of CLF and SWN have not been determined and compared yet. In this study, we generated transgenic lines expressing GFP-tagged CLF/SWN under their respective native promoters and used them for ChIP-seq analyses to profile the genome-wide distributions of CLF and SWN in Arabidopsis seedlings. We also profiled and compared the global H3K27me3 levels in wild-type (WT) and PcG mutants (clf, swn, and clf swn). Our data show that CLF and SWN bind to almost the same set of genes, except that SWN has a few hundred more targets. Two short DNA sequences, the GAGA-like and Telo-box-like motifs, were found enriched in the CLF and SWN binding regions. The H3K27me3 levels in clf, but not in swn, were markedly reduced compared with WT; and the mark was undetectable in the clf swn double mutant. Further, we profiled the transcriptomes in clf, swn, and clf swn, and compared with that in WT. Thus this work provides a useful resource for the plant epigenetics community for dissecting the functions of PRC2 in plant growth and development.

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