Orphan receptor with constitutive G(s) signaling activity that activate cyclic AMP. Has a potential role in modulating a number of brain functions, including behavioral responses to stress (By similarity), amyloid-beta peptide generation in neurons (By similarity) and neurite outgrowth. Maintains also meiotic arrest in oocytes (By similarity). Abundantly expressed in granule neurons at all development stages. Belongs to the G-protein coupled receptor 1 family.