Transcriptomics,Genomics

Dataset Information

299

Genome wide profiling of MBD2 binding


ABSTRACT: We show that in vivo MBD2 is mainly recruited to CpG island promoters that are highly methylated. We also report that MBD2 binds to a subset of CpG island promoters that are characterized by the presence of active histone marks and RNA polymerase II (Pol2). At such sites, MBD2 binds downstream of the transcription start site. Active promoters bound by MBD2 show low to medium gene expression levels and H3K36me3 deposition suggesting a putative role for MBD2 in blocking polymerase II (Pol2) elongation at these promoters. To gain further insight into the function of and epigenetic regulation by MBD2 we generated a tagged version of the protein and stably expressed it in the MCF-7 cell line. We mapped genome wide binding of MBD2 by ChIP sequencing (ChIP-seq) and together with base resolution whole genome bisulfite sequencing (WGBS) we were able to determine the methylation content and the role of methylation density at MBD2 enriched regions. We further dissected MBD2 binding properties, taking advantage of a large set of ChIP-seq data including active histone marks, RNA polymerase II (POL2) and strand specific RNA-seq.

ORGANISM(S): Homo sapiens  

SUBMITTER: Hendrik G Stunnenberg   Roberta Menafra  Nina C Hubner  Stefanie J Bartels  Arie B Brinkman  Filomena Matarese  Luan Nguyen  Takashi Shimbo  H.G. Stunnenberg  Paul A Wade  Gianluigi Franci 

PROVIDER: E-GEOD-54693 | ArrayExpress | 2014-07-03

SECONDARY ACCESSION(S): GSE54693SRP037971PRJNA238298

REPOSITORIES: GEO, ArrayExpress, ENA

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Publications


MBD2 is a subunit of the NuRD complex that is postulated to mediate gene repression via recruitment of the complex to methylated DNA. In this study we adopted an MBD2 tagging-approach to study its genome wide binding characteristics. We show that in vivo MBD2 is mainly recruited to CpG island promoters that are highly methylated. Interestingly, MBD2 binds around 1 kb downstream of the transcription start site of a subset of ∼ 400 CpG island promoters that are characterized by the presence of act  ...[more]

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