Regulatory subunit of the ATP-dependent BRF-1 and BRF-5 ISWI chromatin remodeling complexes, which form ordered nucleosome arrays on chromatin and facilitate access to DNA during DNA-templated processes such as DNA replication, transcription, and repair (By similarity). Both complexes regulate the spacing of nucleosomes along the chromatin and have the ability to slide mononucleosomes to the center of a DNA template (By similarity). The BRF-1 ISWI chromatin remodeling complex has a lower ATP hydrolysis rate than the BRF-5 ISWI chromatin remodeling complex (By similarity). Chromatin reader protein, involved in positively modulating the rate of age-related behavioral deterioration (PubMed:32103178). Represses the expression of mitochondrial function-related genes, perhaps by occupying their promoter regions, working in concert with histone methyltransferase EHMT1 (PubMed:32103178). Component of the BRF-1 ISWI chromatin remodeling complex, at least composed of SMARCA1 and BAZ2B, which regulates the spacing of histone octamers on the DNA template to facilitate access to DNA (By similarity). Within the BRF-1 ISWI chromatin remodeling complex interacts with SMARCA1; the interaction is direct (By similarity). Component of the BRF-5 ISWI chromatin remodeling complex, at least composed of SMARCA5/SNF2H and BAZ2B, which regulates the spacing of histone octamers on the DNA template to facilitate access to DNA (By similarity). Within the BRF-5 ISWI chromatin remodeling complex interacts with SMARCA5/SNF2H; the interaction is direct (By similarity). Interacts with acetylated lysine residues on histone H1.4, H2A, H2B, H3 and H4 (in vitro) (By similarity). Interacts with EHMT1 (PubMed:32103178). Belongs to the WAL family. Truncated N-terminus.