Predicted to enable Wnt-protein binding activity. Involved in several processes, including Wnt signaling pathway; embryonic morphogenesis; and left/right axis specification. Located in basolateral plasma membrane and cytoplasmic vesicle. Expressed in several structures, including CAN; anal region; intestinal muscle; tail hypodermis; and ventral nerve cord. Human ortholog(s) of this gene implicated in Zaki syndrome. Is an ortholog of human WLS (Wnt ligand secretion mediator).