Enables DNA binding activity and transcription coactivator activity. Involved in cellular response to virus; germinal center B cell differentiation; and positive regulation of interleukin-6 production. Predicted to be located in nucleus. Predicted to be part of RNA polymerase II transcription regulator complex. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; hemolymphoid system gland; and liver and biliary system. Orthologous to human POU2AF1 (POU class 2 homeobox associating factor 1). [provided by Alliance of Genome Resources, Apr 2022]