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DNA Methylation-Based High-Resolution Mapping of Long-Distance Chromosomal Interactions in Nucleosome-Depleted Regions (4C)

ABSTRACT: Here, we present Methyltransferase Targeting-based chromosome Architecture Capture (MTAC), a method that maps the contacts between a target site (viewpoint) and the rest of the genome with high resolution and sensitivity. By targeting M.CviPI DNA methyltransferase to the viewpoint and by detecting differentially methylated regions, MTAC detects hundreds of intra- and inter-chromosomal interactions in the budding yeast genome that cannot be captured by 4C, Hi-C, or Micro-C.

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE242394 | GEO | 2023/09/05

REPOSITORIES: GEO

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DNA Methylation-Based High-Resolution Mapping of Long-Distance Chromosomal Interactions in Nucleosome-Depleted Regions (MeDIP)

Project description:Here, we present Methyltransferase Targeting-based chromosome Architecture Capture (MTAC), a method that maps the contacts between a target site (viewpoint) and the rest of the genome with high resolution and sensitivity. By targeting M.CviPI DNA methyltransferase to the viewpoint and by detecting differentially methylated regions, MTAC detects hundreds of intra- and inter-chromosomal interactions in the budding yeast genome that cannot be captured by 4C, Hi-C, or Micro-C.

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Circularized chromosome conformation capture (4C-seq) in A549 cells after glucocorticoid re-induction

Project description:We performed 4C-seq in the A549 cell line to investigate changes in chromatin interactions at the ZBTB16 locus. Cells were treated with either 100 nM dexamethasone or 0.1% ethanol. After 4 hours, cells were washed 2x with PBS and cultured in hormone-free medium for 24 hours, after which cells were treated again for 4 hours with either 100 nM dexamethasone or 0.1% ethanol. Experiments were performed in two biological replicates. For each treatment, 4C-seq data were generated for the following two viewpoints: ZBTB16 promoter-proximal viewpoint coordinates: chr11:113929670-113930464 (hg19) ZBTB16 intronic viewpoint coordinates: chr11:114051224-114051804 (hg19)

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Project description:The HASTER promoter region is a cis-regulatory element that stabilizes the transcription of HNF1A, preventing silencing or overexpression. We have generated a mouse model where the promoter of Haster has been specifically deleted in liver (Haster loxP/loxP; AlbCre). In liver the prevailing consequence is upregulation of HNF1A. We performed UMI-4C experiments to assess how Haster inactivation remodel 3D chromatin interactions of the Hnf1a promoter using the Hnf1a promoter as viewpoint (V1, Hnf1a promoter upstream CTCF site viewpoint; V2, Hnf1a promoter VP).

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