Enables nuclear receptor binding activity and nuclear receptor coactivator activity. Predicted to be involved in several processes, including cellular response to estrogen stimulus; negative regulation of myoblast differentiation; and regulation of mitotic cell cycle. Predicted to act upstream of or within positive regulation of transcription by RNA polymerase II. Located in nucleus. Orthologous to human SRA1 (steroid receptor RNA activator 1). [provided by Alliance of Genome Resources, Apr 2022]