Predicted to enable RS domain binding activity and transcription coactivator activity. Predicted to be involved in regulation of mRNA splicing, via spliceosome. Predicted to act upstream of or within regulation of transcription by RNA polymerase II. Predicted to be located in centriolar satellite and nuclear speck. Predicted to be part of protein-containing complex. Orthologous to human RBM39 (RNA binding motif protein 39). [provided by Alliance of Genome Resources, Apr 2022]