Predicted to enable chromatin DNA binding activity; histone acetyltransferase activity; and transcription coactivator activity. Acts upstream of or within hematopoietic progenitor cell differentiation. Located in cytoplasm and nucleus. Is expressed in several structures, including blastoderm; blastodisc; digestive system; segmental plate; and solid lens vesicle. Human ortholog(s) of this gene implicated in Rubinstein-Taybi syndrome; acute lymphoblastic leukemia; and acute myeloid leukemia. Orthologous to human CREBBP (CREB binding protein).