Enables RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in chromatin organization. Predicted to act upstream of or within DNA replication and chromatin organization. Located in nucleus. Part of ESC/E(Z) complex and NuRD complex. Is expressed in several structures, including central nervous system; early conceptus; gonad; hemolymphoid system gland; and retina nuclear layer. Orthologous to human RBBP4 (RB binding protein 4, chromatin remodeling factor). [provided by Alliance of Genome Resources, Apr 2022]