Enables nucleoside-diphosphatase activity and nucleoside-triphosphatase activity. Acts upstream of or within G protein-coupled receptor signaling pathway; platelet activation; and purine ribonucleoside diphosphate catabolic process. Located in basement membrane and plasma membrane. Is expressed in nervous system. Human ortholog(s) of this gene implicated in high grade glioma. Orthologous to human ENTPD2 (ectonucleoside triphosphate diphosphohydrolase 2). [provided by Alliance of Genome Resources, Apr 2022]