Predicted to enable metal ion binding activity and metalloaminopeptidase activity. Predicted to act upstream of or within proteolysis. Predicted to be located in extracellular exosome. Is expressed in brain; forelimb bud; large intestine; and neural retina. Human ortholog(s) of this gene implicated in acquired angioedema. Orthologous to human XPNPEP2 (X-prolyl aminopeptidase 2). [provided by Alliance of Genome Resources, Apr 2022]