Enables ubiquitin protein ligase activity. Involved in ubiquitin-dependent endocytosis. Located in early endosome. Is expressed in several structures, including alimentary system; brain; ganglia; spinal cord; and urinary system. Orthologous to human NEURL1B (neuralized E3 ubiquitin protein ligase 1B). [provided by Alliance of Genome Resources, Apr 2022]