Orphan receptor. Displays a significant level of constitutive activity. Its effect is mediated by G(s)-alpha protein that stimulate adenylate cyclase, resulting in an elevation of intracellular cAMP (By similarity). Exclusively expressed in the brain. Prominent expression is detected throughout the entire neocortex at all rostrocaudal and dorsoventral levels. Strong expression is detected in olfactory and auditory sensory areas. At 14.5 dpc, expression is limited to the developing nervous system with strong expression in the developing cortex, midbrain, cerebellum and medulla. Weaker expression is also detected in the trigeminal ganglion. Belongs to the G-protein coupled receptor 1 family.