Receptor for lysophosphatidic acid (LPA). Necessary for p53/TP53-dependent survival in response to DNA damage. Expressed in placenta and prostate. Weaker expression in thymus. Not expressed in thalamus, hippocampus, pons or cerebellum. Overexpressed in squamous cell carcinoma of the lung. By expression of p53/TP53 and by DNA damage in a TP53-dependent manner. Belongs to the G-protein coupled receptor 1 family.