Enables urate oxidase activity. Involved in allantoin metabolic process; purine-containing compound catabolic process; and urate catabolic process. Located in mitochondrion. Is active in peroxisome. Is expressed in several structures, including alimentary system; genitourinary system; integumental system; respiratory system; and sensory organ. Used to study hyperuricemia; kidney disease; and nephrogenic diabetes insipidus. Orthologous to human UOX (urate oxidase (pseudogene)). [provided by Alliance of Genome Resources, Apr 2022]