Predicted to act upstream of or within RNA splicing and mRNA processing. Predicted to be located in cytosol and nuclear speck. Predicted to be part of U2-type catalytic step 2 spliceosome. Is expressed in liver; lung; metanephros; renal cortex; and submandibular gland primordium. Orthologous to human SNRNP40 (small nuclear ribonucleoprotein U5 subunit 40). [provided by Alliance of Genome Resources, Apr 2022]