Thermodynamic assessment of the stability of thrombin receptor antagonistic peptides in hydrophobic environments

Reinhard I. Boysen, Agnes J O Jong, Milton T W Hearn

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15 Citations (Scopus)

Abstract

In this paper, a general procedure is described to determine thermodynamic parameters associated with the interaction of thrombin receptor antagonistic peptides (TRAPs) with immobilized nonpolar ligands. The results show that these interactions were associated with nonlinear van't Hoff dependencies over a wide temperature range. Moreover, changes in relevant thermodynamic parameters, namely the changes in Gibbs free energy of interaction, ΔGassoc 0, enthalpy of interaction, ΔHassoc 0, entropy of interaction, ΔSassoc 0, and heat capacity, ΔCp 0, have been related to the structural properties of these TRAP analogs. The implications of these investigations for the design of thrombin receptor agonists/antagonists with structures stabilized by intramolecular hydrophobic interactions are discussed.

Original languageEnglish
Pages (from-to)2279-2292
Number of pages14
JournalBiophysical Journal
Volume82
Issue number5
Publication statusPublished - 2002

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