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DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300 [HCT116 ChIP-seq]

ABSTRACT: Genome-wide maps of H3K4me3 and H3K27ac in HCT116 WT and DBC1 KO cells

ORGANISM(S): Homo sapiens

PROVIDER: GSE201362 | GEO | 2022/08/17

REPOSITORIES: GEO

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DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300.

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DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300 [ChIP-Seq]

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DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300 [HCT116 RNA-seq]

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DBC1 is a key positive regulator of enhancer epigenomic writers KMT2D and p300.

Project description:Histone modification is a key epigenetic mechanism for regulation of chromatin dynamics and gene expression. Deleted in breast cancer 1 (DBC1) has been shown to act as a negative regulator of epigenetic modifiers and as a co-activator for nuclear receptors and other transcription factors. However, little is known about the role of DBC1 in the regulation of histone modifications and chromatin landscapes. Here, we analyzed genome-wide profiles of active enhancer and promoter marks in colorectal cancer cells and report DBC1 as a critical positive regulator of histone epigenetic writers KMT2D (H3K4 methyltransferase) and p300 (histone acetyltransferase). DBC1 is required for establishing the landscape of active enhancers, for genome-wide chromatin binding and enhancer recruitment of KMT2D and p300, and for gene activation involved in colorectal cancer progression. DBC1 interacts directly with KMT2D and p300, and enhances KMT2D-mediated histone H3K4 methylation (H3K4me1/2/3) and p300-mediated H3 acetylation. Importantly, DBC1 contributes to super-enhancer formation and function by facilitating the recruitment of KMT2D and p300 and by enhancing their functional interaction and cooperative cross-talk. Our results highlight the critical role of DBC1 as a key positive regulator of KMT2D and p300, and provide insights into regulatory mechanisms underlying the interplay between the enhancer epigenomic writers in enhancer activation.

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DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300 [HCT116 RNA-seq]

Project description:DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300 [HCT116 RNA-seq]

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Project description:DBC1 is a positive regulator of enhancer epigenomic writers KMT2D and p300.