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Mus musculus

ABSTRACT: ChIP-Seq of HA tagged ZFP57 and KAP1 in mouse ES cells

PROVIDER: PRJNA154073 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR327031.fastq.gz	Fastqsanger.gz
	SRR327032.fastq.gz	Fastqsanger.gz
	SRR327033.fastq.gz	Fastqsanger.gz
	SRR327034.fastq.gz	Fastqsanger.gz
	SRR327035.fastq.gz	Fastqsanger.gz

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ChIP-Seq of HA tagged ZFP57 and KAP1 in mouse ES cells

Project description:We have performed ChIP seq analysis to obtain the positions of KAP1 and ZFP57 binding sites in mouse ES cells. By comparing the two lists, we were able to find bona fide sites. ChIP-Seq of HA tagged ZFP57 and KAP1 in mouse ES cells

2011-11-07 | E-GEOD-31181 | biostudies-arrayexpress

ZFP57/KAP1 recognize a methylated hexanucleotide to affect the chromatin and DNA methylation of imprinting control regions in embryonic stem cells

Project description:This SuperSeries is composed of the following subset Series: GSE31181: ChIP-Seq of HA tagged ZFP57 and KAP1 in mouse ES cells GSE31182: RNA-seq and expression profile of WT and ZFP57 KO ES cells Refer to individual Series

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ChIP-Seq of HA tagged ZFP57 and KAP1 in mouse ES cells

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Epigenetic regulation of unique genes and repetitive elements by KRAB zinc finger protein ZFP57 in embryonic stem cells

Project description:KRAB-zinc finger proteins (KZFPs) represent one of the largest families of DNA binding proteins in vertebrate genomes and appear to have evolved to silence transposable elements (TEs) including endogenous retroviruses through sequence-specific targeting of repressive chromatin states. However, one member, ZFP57, is required to maintain the post-fertilization DNA methylation memory of parental-origin at genomic imprints. We have conducted RNA-seq and ChIP-seq analyses in normal and ZFP57 mutant ES cells to characterize the targets of ZFP57 in more detail. Over 80% of ZFP57 targets are TEs. However, mutants indicate that ZFP57 is not essential for their repression in ES cells. The remaining targets lie within unique imprinted and non-imprinted sequences. Though loss of ZFP57 influences imprinted genes as expected, the majority of unique gene targets lose H3K9me3 with little effect on DNA methylation and with very few exhibiting alterations in expression. Furthermore, comparison with DNA methyltransferase-deleted ES cells (TKO) identifies remarkably similar losses of H3K9me3 and changes in expression, defining regions where H3K9me3 is secondary to DNA methylation. We determine that ZFP57 is the principal methylation-sensitive KZFP recruiting KAP1 and H3K9me3 in ES cells. Finally, like imprints, other unique targets of ZFP57 are enriched for germline-derived DNA methylation including oocyte-specific methylation that is resistant to post-fertilisation epigenetic reprogramming. Our analyses suggest the evolution of a DNA methylation sensitive KZFP, that may serve to reinforce the silenced state at TEs, but whose primary function is to maintain DNA methylation and repressive histone marks at imprinted regions.

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Project description:Nr5a2 (also known as liver receptor homolog-1, Lrh-1) has been shown to bind both the proximal enhancer and proximal promoter regions of Pou5f1 and regulate Pou5f1 in the epiblast stage of mouse embryonic development (Gu et al., 2005). Nr5a2-null embryos display a loss of Oct4 expression in the epiblasts (Gu et al., 2005) and die between E6.5 and E7.5 (Gu et al., 2005; Pare et al., 2004). To identify the targets of Nr5a2, we generated a stable ES cell-line that expresses HA-tagged Nr5a2. Anti-HA antibody was used to immunoprecipitate HA-Nr5a2 for ChIP-seq analysis. Keywords: Transcription factor binding sites To identify the binding sites of Nr5a2, we generated a stable ES cell-line that expresses HA-tagged Nr5a2. Anti-HA antibody was used to immunoprecipitate HA-Nr5a2.

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Project description:In mouse embryonic stem cells SNPs disrupting closely-spaced hexanucleotide motifs are associated with lack of ZFP57 binding and H3K9me3 enrichment. Examination of ZFP57-KAP1 allele-specific binding in two lines of mouse embryonic stem cells JB1 and BJ1 generated from F1 hybrids derived from JF1 x B6 and B6 x JF1 crosses respectively.

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