Promotes neurite outgrowth and blocks myelin inhibition in neurons (By similarity). Receptor with constitutive G(s) signaling activity that stimulates cyclic AMP production. Belongs to the G-protein coupled receptor 1 family. Was originally (PubMed:12220620) thought to be a receptor for sphingosine 1-phosphate. It has been demonstrated that it is not the case in human (PubMed:19286662).