Crystal structure of human parathyroid hormone 1-34 at 0.9-A resolution.Jin, L., Briggs, S.L., Chandrasekhar, S., Chirgadze, N.Y., Clawson, D.K., Schevitz, R.W., Smiley, D.L., Tashjian, A.H., Zhang, F.
(2000) J Biol Chem 275: 27238-27244
- PubMed: 10837469
- DOI: https://doi.org/10.1074/jbc.M001134200
- Primary Citation of Related Structures:
- PubMed Abstract:
The N-terminal fragment 1-34 of parathyroid hormone (PTH), administered intermittently, results in increased bone formation in patients with osteoporosis. PTH and a related molecule, parathyroid hormone-related peptide (PTHrP), act on cells via a common PTH/PTHrP receptor. To define more precisely the ligand-receptor interactions, we have crystallized human PTH (hPTH)-(1-34) and determined the structure to 0.9-A resolution. hPTH-(1-34) crystallizes as a slightly bent, long helical dimer. Analysis reveals that the extended helical conformation of hPTH-(1-34) is the likely bioactive conformation. We have developed molecular models for the interaction of hPTH-(1-34) and hPTHrP-(1-34) with the PTH/PTHrP receptor. A receptor binding pocket for the N terminus of hPTH-(1-34) and a hydrophobic interface with the receptor for the C terminus of hPTH-(1-34) are proposed.
Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, Indiana 46285, USA.