Is predicted to encode a protein with the following domains: GRASP55/65 PDZ-like domain; PDZ superfamily; WD domain, G-beta repeat; WD40 repeat; WD40/YVTN repeat-like-containing domain superfamily; LisH-like dimerisation domain; GRASP-type PDZ domain; and WD40-repeat-containing domain superfamily. Is an ortholog of C. elegans smu-1. In C. elegans, smu-1 is involved in several processes, including mechanosensory behavior; nematode larval development; and regulation of alternative mRNA splicing, via spliceosome.