✦ LIBER ✦

Conformation of parathyroid hormone antagonists by CD, nmr, and molecular dynamics simulations

✍ Scribed by Michael Chorev; Vered Behar; Quming Yang; Michael Rosenblatt; Stefano Mammi; Stafano Maretto; Maria Pellegrini; Evaristo Peggion

Publisher: Wiley (John Wiley & Sons)
Year: 1995
Tongue: English
Weight: 733 KB
Volume: 36
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.360360411

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✦ Synopsis

The conformation of two highly potent parathyroid hormone (PTH) antagonists was investigated in water/2,2,2-trifluoroethanol mixtures. The two peptides are derived9om the sequence and have a D -T v ~ replacing Gly in position 12. In the analogue derivedfrom PTHrP, Lys" was replaced by Leu to remove the residual agonist activity. The study w m conducted by CD and ttvo-dimensional proton magnetic resonance spectroscopy, and the nuclear Overhauser eflects,found were utilized in restrained distance geometry and molecular dynamics simulations.

Both pepti& adopt a helical C-terminal conformation, which seems more stable in the case ofthe PTHrP analogue. A type II' @-turn centered around D-Trp12 and LJLS'~ is present in both structures.

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