The BRD4-nucleosome interaction is enhanced modestly and non-selectively by histone acetylation.

ABSTRACT: BRD4 regulates gene transcription in complex eukaryotes, in part through the binding of its tandem bromodomains to acetylated lysine residues found in histones and transcription factors. Despite pharmacological inhibition of these domains showing promise in preclinical studies, clinical trial data have been less encouraging so far. A stronger understanding of BRD4 biochemistry could provide a route to better outcomes. To advance on prior work, which has focused almost entirely on the binding of isolated bromodomains and acetylated peptides, we have sought the preferred nucleosomal binding partner of full-length BRD4. We demonstrate that BRD4 binds with sub-micromolar affinity to both unmodified nucleosomes and to DNA alone. In strong contrast to BRD4-peptide interactions, we also find that

SUBMITTER: Lambrechts LS 

PROVIDER: S-EPMC12746106 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature