Receptor for lysophosphatidic acid (LPA), a mediator of diverse cellular activities. Seems to be coupled to the G(i)/G(o), G(12)/G(13), and G(q) families of heteromeric G proteins. Plays a key role in phospholipase C-beta (PLC-beta) signaling pathway Stimulates phospholipase C (PLC) activity in a manner that is independent of RALA activation (By similarity). Interacts with SLC9A3R2/NHERF2, MAGI3 and PLCB3. Interacts with RALA and GRK2 (By similarity). Prior to LPA treatment found predominantly at the cell surface but in the presence of LPA colocalizes with RALA in the endocytic vesicles. Most abundantly expressed in testes, kidney, and embryonic brain. Other organs also express the transcript, including heart, lung, spleen, thymus, stomach, and adult brain. Several have little or no expression, including liver, small intestine, and skeletal muscle. Belongs to the G-protein coupled receptor 1 family. Several.