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• W3085694443 abstract "CCCTC-binding factor (CTCF) sites interact with each other in the chromatin environment, establishing chromatin domains. Our previous study showed that interaction between CTCF sites is cell type-specific around the β-globin locus and is dependent on erythroid-specific activator GATA-1. To find out molecular mechanisms of the cell type-specific interaction, we directly inhibited GATA-1 binding to the β-globin enhancers by deleting its binding motifs and found that histone H3K27 acetylation (H3K27ac) was decreased at CTCF sites surrounding the β-globin locus, even though CTCF binding itself was maintained at the sites. Forced H3K27ac by Trichostatin A treatment or CBP/p300 KD affected the interactions between CTCF sites around the β-globin locus without changes in CTCF binding. Analysis of public ChIA-PET data revealed that H3K27ac is higher at CTCF sites forming short interactions than long interactions. GATA-1 was identified as a representative transcription factor that relates with genes present inside the short interactions in erythroid K562 cells. Depletion of GATA-1-reduced H3K27ac at CTCF sites near erythroid-specific enhancers. These results indicate that H3K27ac at CTCF sites is required for cell type-specific chromatin interactions between them. Tissue-specific activator GATA-1 appears to play a role in H3K27ac at CTCF sites in erythroid cells." @default.
• W3085694443 created "2020-09-21" @default.
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• W3085694443 date "2020-09-14" @default.
• W3085694443 modified "2023-09-26" @default.
• W3085694443 title "GATA‐1‐dependent histone H3K27 acetylation mediates erythroid cell‐specific chromatin interaction between CTCF sites" @default.
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• W3085694443 doi "https://doi.org/10.1096/fj.202001526r" @default.
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