Is a receptor for the SMIM20 derived peptides Phoenixin-14 and Phoenixin-20 (PubMed:27268078). It mediates the Phoenixin-14 and Phoenixin-20 augmentation of gonadotropin-releasing hormone (GNRH) signaling in the hypothalamus and pituitary gland (PubMed:27268078). In the ovary, it mediates the effects of Phoenixin-14 and Phoenixin-20 induced granulosa cell proliferation during follicular growth (PubMed:30933929). Expressed in the ovary, specifically in granulosa cells of follicles that have passed the primary stage and in oocytes (at protein level) (PubMed:30933929). Expressed in preadipocytes (PubMed:30251651). Belongs to the G-protein coupled receptor 1 family.