Enables PDZ domain binding activity and lysophosphatidic acid receptor activity. Involved in several processes, including activation of phospholipase C activity; adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway; and positive regulation of stress fiber assembly. Acts upstream of or within bleb assembly; positive regulation of MAPK cascade; and positive regulation of Rho protein signal transduction. Is integral component of plasma membrane. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; limb; and sensory organ. Orthologous to human LPAR1 (lysophosphatidic acid receptor 1). [provided by Alliance of Genome Resources, Apr 2022]