The function of Ensembl gene identifier ENSG00000168546 (GFRA2, GDNF family receptor alpha 2) is as follows. Receptor for neurturin (NRTN), a growth factor that supports the survival of sympathetic neurons (PubMed:10829012, PubMed:29414779, PubMed:31535977, PubMed:9182803). NRTN-binding leads to autophosphorylation and activation of the RET receptor (PubMed:31535977). Also able to mediate GDNF signaling through the RET tyrosine kinase receptor (PubMed:9182803). {ECO:0000269|PubMed:10829012, ECO:0000269|PubMed:29414779, ECO:0000269|PubMed:31535977, ECO:0000269|PubMed:9182803}. [Isoform 2]: Participates in NRTN-induced 'Ser-727' phosphorylation of STAT3. .