The p300 and CBP co-activators are histone acetylases and central regulators of transcription in metazoans. The genomic occupancy of p300/CBP detected by ChIP-seq experiments can be used to identify transcriptional enhancers. However, studies in Drosophila embryos suggest that there is a preference for some transcription factors in directing p300/CBP to the genome. Although p300/CBP occupancy in general correlates with gene activation, they can also be found at silent genomic regions, which does not result in histone acetylation. Polycomb-mediated H3K27me3 is associated with repression, but does not preclude p300/CBP binding. An antagonism between H3K27ac and H3K27me3 indicates that p300/CBP may be involved in switching between repressed and active chromatin states. © 2013 Landes Bioscience.
CITATION STYLE
Holmqvist, P. H., & Mannervik, M. (2013). Genomic occupancy of the transcriptional co-activators p300 and CBP. Transcription, 4(1), 18–23. https://doi.org/10.4161/trns.22601
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