Enables D-amino-acid oxidase activity and FAD binding activity. Involved in D-alanine catabolic process. Acts upstream of or within leucine metabolic process. Predicted to be located in cytosol and peroxisomal membrane. Predicted to be active in cytoplasm. Predicted to colocalize with mitochondrial outer membrane. Is expressed in metanephros; renal cortex; ureter; and urinary system. Human ortholog(s) of this gene implicated in schizophrenia. Orthologous to human DAO (D-amino acid oxidase). [provided by Alliance of Genome Resources, Apr 2022]