Olfactory receptor that acts as a receptor of Asprosin hormone at the surface of hepatocytes to promote hepatocyte glucose release (PubMed:31230984). Also binds Asprosin in the arcuate nucleus of the hypothalamus, thereby stimulating appetite by promoting orexigenic AgRP neuronal activity (PubMed:32337066). In testis, Asprosin-binding promotes sperm progressive motility and enhances male fertility (PubMed:31798959). The activity of this receptor is mediated by G proteins which activate adenylyl cyclase, resulting in an elevation of intracellular cAMP (PubMed:31230984). Highly expressed in liver but not in adipose tissue (PubMed:31230984). Also expressed at high level in testis (PubMed:31798959). Compared to wild-type mice, mutant mice fed on a regular diet show a remarkable decrease in body weight, food intake, fat mass and plasma lipids (PubMed:31230984). Blunted response to Asprosin, including attenuated cAMP levels and hepatic glucose production, as well as improved insulin sensitivity (PubMed:31230984). Mutant mice show significantly reduced food intake in overnight-fasted mice compared with wild-type mice (PubMed:32337066). Male mice display decreased fertility caused by impaired sperm motility (PubMed:31798959). Belongs to the G-protein coupled receptor 1 family.