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• W2980353838 abstract "Abstract The transcription coactivators CREB binding protein (CBP) and p300 are highly homologous acetyltransferases that mediate histone 3 lysine 27 acetylation (H3K27ac) at regulatory elements such as enhancers and promoters. Although in most cases, CBP and p300 are considered to be functionally identical, both proteins are indispensable for development and there is evidence of tissue-specific nonredundancy. However, characterization of chromatin and transcription states regulated by each protein is lacking. In this study we analyze the individual contribution of p300 and CBP to the H3K27ac landscape, chromatin accessibility, and transcription in mouse embryonic stem cells (mESC). We demonstrate that p300 is responsible for the majority of H3K27ac in mESCs and that loss of acetylation in p300-depleted mESCs is more pronounced at enhancers compared to promoters. While loss of either CBP or p300 has little effect on the open state of chromatin, we observe that distinct gene sets are transcriptionally dysregulated upon depletion of p300 or CBP. Transcriptional dysregulation is generally correlated with dysregulation of promoter acetylation upon depletion of p300 (but not CBP) and appears to be relatively independent of dysregulated enhancer acetylation. Interestingly, both our transcriptional and genomic analyses demonstrate that targets of the p53 pathway are stabilized upon deletion of p300, suggesting that this pathway is highly prioritized when p300 levels are limited." @default.
• W2980353838 created "2019-10-25" @default.
• W2980353838 creator A5020659776 @default.
• W2980353838 creator A5052476339 @default.
• W2980353838 creator A5061575644 @default.
• W2980353838 date "2019-10-16" @default.
• W2980353838 modified "2023-09-27" @default.
• W2980353838 title "Differential contribution of p300 and CBP to regulatory elements in mESCs" @default.
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• W2980353838 doi "https://doi.org/10.1101/806869" @default.
• W2980353838 hasPublicationYear "2019" @default.
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