Enables amino acid binding activity and dimethylargininase activity. Involved in arginine metabolic process; positive regulation of angiogenesis; and positive regulation of nitric oxide biosynthetic process. Human ortholog(s) of this gene implicated in cardiovascular system disease and hypertension. Orthologous to human DDAH1 (dimethylarginine dimethylaminohydrolase 1). [provided by Alliance of Genome Resources, Apr 2022]