Receptor for the lysosphingolipid sphingosine 1-phosphate (S1P) (By similarity). S1P is a bioactive lysophospholipid that elicits diverse physiological effects on most types of cells and tissues (By similarity). Receptor for the chemokine-like protein FAM19A5 (By similarity). Mediates the inhibitory effect of FAM19A5 on vascular smooth muscle cell proliferation and migration (By similarity). Most abundant in heart and lung; low, but clearly observed in kidney, liver and thymus; much lower but detectable in brain, testis, stomach and intestine. Not significantly detected in any of the sections of embryonic day (E) 14-18, except in embryonic brain. Belongs to the G-protein coupled receptor 1 family.