Predicted to enable GDP phosphatase activity; UDP phosphatase activity; and ribonucleoside triphosphate phosphatase activity. Predicted to be involved in nucleoside diphosphate catabolic process. Predicted to be located in membrane. Predicted to be active in plasma membrane. Is expressed in brain; heart; and liver. Orthologous to human ENTPD8 (ectonucleoside triphosphate diphosphohydrolase 8).