Predicted to enable WW domain binding activity; chromatin DNA binding activity; and transcription coactivator activity. Predicted to be involved in egg activation; male pronucleus assembly; and positive regulation of transcription, DNA-templated. Predicted to act upstream of or within female pronucleus assembly. Predicted to be located in perinuclear theca; sperm flagellum; and sperm head. Predicted to be active in nucleus. Orthologous to human WBP2NL (WBP2 N-terminal like). [provided by Alliance of Genome Resources, Apr 2022]