ATP-dependent chromatin-remodeling factor that binds and distorts nucleosomal DNA (PubMed:28977666, PubMed:32543371). Acts as a component of the histone deacetylase NuRD complex which participates in the remodeling of chromatin (PubMed:16428440, PubMed:17626165, PubMed:28977666, PubMed:9804427). Localizes to acetylated damaged chromatin in a ZMYND8-dependent manner, to promote transcriptional repression and double-strand break repair by homologous recombination (PubMed:25593309). Involved in neurogenesis (By similarity). {ECO:0000250|UniProtKB:Q6PDQ2, ECO:0000269|PubMed:16428440, ECO:0000269|PubMed:17626165, ECO:0000269|PubMed:25593309, ECO:0000269|PubMed:28977666, ECO:0000269|PubMed:32543371, ECO:0000269|PubMed:9804427}. This is the function of ENSG00000111642 (CHD4, chromodomain helicase DNA binding protein 4).