Lysophosphatidic Acid Receptor 3 (LPAR3)

LPA and the structurally related lysolipid mediator sphingosine 1-phosphate (S1P) signal cells through a set of G protein-coupled receptors known as EDG receptors. Some EDG receptors (e.g., EDG1) are S1P receptors; others (e.g., EDG2) are LPA receptors. EDG7 mediates responses to unsaturated LPA .Sequence analysis predicted that the 353-amino acid EDG7 protein shares approximately 54% and 49% amino acid identity with EDG2 and EDG4, respectively, and less than 40% identity with the S1P-specific receptors (e.g., EDG1). Northern blot analysis detected a 4.3-kb EDG7 transcript in heart, pancreas, prostate, and testis, with lower expression in lung, ovary, and some cancer cell lines. Western blot analysis showed that transfected cells express EDG7 as an approximately 35-kD protein.