Cloning and functional expression of a human parathyroid hormone receptor

We have cloned a human receptor for parathyroid hormone from a kidney complementary DNA library. The deduced sequence of 593 amino acids shows high homology to the previously cloned receptors from opossum and rat. Expressed in COS-1 cells, the human receptor binds to parathyroid hormone-(1-38) with high affinity (pKD = 8.5) and is functionally coupled to adenylate cyclase (pEC50 = 9.4). At high concentrations of agonist, the receptor also activates phosphoinositide turnover.