Is a receptor for the SMIM20 derived peptides Phoenixin-14 and Phoenixin-20 (PubMed:27440717). It mediates the Phoenixin-14 and Phoenixin-20 augmentation of gonadotropin-releasing hormone (GNRH) signaling in the hypothalamus and pituitary gland (PubMed:27440717). In the ovary, it mediates the effects of Phoenixin-14 and Phoenixin-20 induced granulosa cell proliferation during follicular growth (By similarity). Expressed in the brain, preadipocytes and pancreatic islet cells. Belongs to the G-protein coupled receptor 1 family.