Enables endopeptidase activity. Predicted to be involved in proteolysis. Located in extracellular space. Is expressed in several structures, including gut; limb; paraxial mesenchyme; reproductive system; and sensory organ. Human ortholog(s) of this gene implicated in myocardial infarction. Orthologous to human PAPPA (pappalysin 1). [provided by Alliance of Genome Resources, Apr 2022]