Enables protein homodimerization activity and signaling receptor binding activity. Involved in several processes, including animal organ development; cellular response to dexamethasone stimulus; and regulation of morphogenesis of an epithelium. Located in extracellular space. Part of receptor complex. Used to study Parkinsonism and middle cerebral artery infarction. Biomarker of Parkinsonism and sciatic neuropathy. Human ortholog(s) of this gene implicated in Hirschsprung's disease; Parkinsonism; and epilepsy. Orthologous to human GDNF (glial cell derived neurotrophic factor). [provided by Alliance of Genome Resources, Apr 2022]