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The mismatch-repair proteins MSH2 and MSH6 interact with the imprinting control regions through the ZFP57-KAP1 complex (RRBS)

ABSTRACT: The mismatch-repair proteins MSH2 and MSH6 interact with the imprinting control regions through the ZFP57-KAP1 complex (RRBS)

PROVIDER: PRJNA843326 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19439302_1.fastq.gz	Fastqsanger.gz
	SRR19439302_2.fastq.gz	Fastqsanger.gz

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The mismatch-repair proteins MSH2 and MSH6 interact with the imprinting control regions through the ZFP57-KAP1 complex (RRBS)

Project description:Genomic imprinting is controlled by CpG-rich regions (ICRs) acquiring differential methylation in the female and male germline and maintaining it in a parental origin-specific manner in somatic cells. Despite their expected mutation rate due to spontaneous deamination of methylated cytosines, ICRs maintain their CpG-richness and show conservation of CpG-bearing transcription binding sites in mammals. In order to gain further insights into the mechanisms of maintenance of methyl CpGs, we sought to identify the proteins interacting with the methylated allele of the ICRs, by determining the interactors of ZFP57 that recognizes a specific methylated ICR motif in mouse ESCs. Several proteins including factors involved in mRNA processing/splicing, chromatin organization, transcription and DNA repair were identified through a tagged approach coupled to LC–MS/MS analysis. The demonstration of the components of the post-replicative mismatch-repair (MMR) complex as ZFP57 interactors prompted us to investigate the DNA binding profile of MSH2 and MSH6 by chromatin immunoprecipitation and sequencing. We found that these proteins were enriched at the methylated allele of the ICRs and their binding was mediated by the ZFP57/KAP1 complex, suggesting that the MMR complex is recruited to these loci to preserve their genetic integrity.

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