Predicted to enable identical protein binding activity and ubiquitin protein ligase binding activity. Acts upstream of or within intracellular mRNA localization. Located in cytoplasm and nucleus. Part of ribonucleoprotein complex. Is expressed in several structures, including adipose tissue; alimentary system; immune system; nervous system; and reproductive system. Orthologous to human CASC3 (CASC3 exon junction complex subunit). [provided by Alliance of Genome Resources, Apr 2022]