Plays a role in chromatin remodeling and regulation of transcription (PubMed:22464331, PubMed:26365797). Acts as a chromatin reader that recognizes and binds acylated histones: binds histones that are acetylated and/or butyrylated (PubMed:26365797). Component of SWI/SNF chromatin remodeling subcomplex GBAF that carries out key enzymatic activities, changing chromatin structure by altering DNA-histone contacts within a nucleosome in an ATP-dependent manner (PubMed:29374058). Orchestrates also the RAD51-RAD54 complex formation and thereby plays a role in homologous recombination (HR) (PubMed:32457312). Binds acetylated histones H3 and H4 (PubMed:22464331, PubMed:26365797). Binds butyrylated histone H4 (PubMed:26365797). Component of the multiprotein chromatin-remodeling subcomplex SWI/SNF called GBAF, which includes at least BICRA or BICRAL (mutually exclusive), BRD9, SS18, the core BAF subunits, SMARCA2/BRM, SMARCA4/BRG1/BAF190A, ACTL6A/BAF53, SMARCC1/BAF155, and SMARCD1/BAF60A (PubMed:29374058). Interacts (via N-terminal bromodomain) with acteylated RAD54 (PubMed:32457312). Interacts (via C-terminus) with RAD51 (PubMed:32457312). The Bromo domain mediates interaction with histones that have acetylated lysine residues at specific positions (PubMed:22464331). Also recognizes and binds histones that are butyrylated (PubMed:26365797). May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Truncated N-terminus.