Predicted to enable RNA binding activity. Predicted to be involved in mRNA splicing, via spliceosome. Predicted to be located in nucleus. Predicted to be part of U2 snRNP and precatalytic spliceosome. Human ortholog(s) of this gene implicated in Nager acrofacial dysostosis; cervical cancer; and hepatocellular carcinoma. Orthologous to human SF3B4 (splicing factor 3b subunit 4).