Predicted to enable chromatin binding activity and protein antigen binding activity. Predicted to be involved in histone H2A acetylation and histone H4 acetylation. Predicted to act upstream of or within chromatin organization. Located in nuclear speck. Is expressed in several structures, including adrenal gland; central nervous system; genitourinary system; gut; and trachea. Orthologous to human EP400 (E1A binding protein p400). [provided by Alliance of Genome Resources, Apr 2022]