Evaluation of Lactam-Bridged Neurotensin Analogues Adjusting ψ(Pro<sup>10</sup>) Close to the Experimentally Derived Bioactive Conformation of NT(8−13)
作者:Holger Bittermann、Jürgen Einsiedel、Harald Hübner、Peter Gmeiner
DOI:10.1021/jm049644y
日期:2004.10.1
The neurotensin C-terminal hexapeptide, NT(8-13), which has been found to adopt a beta-strand-like conformation while bound to the NT1 receptor, was modified by the introduction of conformational constraints. Synthesis of the four stereoisomeric 4.4-spirolactams 1-4 and subsequent NT1 receptor binding studies showed that the restriction of Psi(Pro(10)) to approximately 130degrees leads to a more than 1000-fold increase of binding affinity for 1 (K-i = 12 nM) when compared to the more flexible analogue [NMeTyr(11)]NT(8-13).