Predicted to enable ubiquitin-protein transferase activity. Involved in negative regulation of Wnt signaling pathway. Located in Golgi apparatus; early endosome; and late endosome. Expressed in several structures, including egg-laying apparatus; enteric muscle; neurons; pharynx; and tail. Human ortholog(s) of this gene implicated in several diseases, including gastrointestinal system cancer (multiple); irritable bowel syndrome; and villous adenoma. Is an ortholog of human RNF43 (ring finger protein 43) and ZNRF3 (zinc and ring finger 3).