Predicted to enable several functions, including K63-linked polyubiquitin modification-dependent protein binding activity; ubiquitin binding activity; and ubiquitin-protein transferase activity. Involved in isotype switching. Acts upstream of or within cellular response to UV and regulation of protein localization. Part of DNA repair complex. Is expressed in bladder; male associated reproductive structure; testis; ureter; and urethra of male. Used to study RIDDLE syndrome. Human ortholog(s) of this gene implicated in RIDDLE syndrome. Orthologous to human RNF168 (ring finger protein 168). [provided by Alliance of Genome Resources, Apr 2022]