Specific Nonpeptide Photoprobes as Tools for the Structural Study of the Angiotensin II AT<sub>1</sub> Receptor
作者:Sandrine Nouet、Pierre R. Dodey、Michel R. Bondoux、Didier Pruneau、Jean-Michel Luccarini、Thierry Groblewski、Renée Larguier、Colette Lombard、Jacky Marie、Patrice P. Renaut、Gérard Leclerc、Jean-Claude Bonnafous
DOI:10.1021/jm991050l
日期:1999.11.1
The aim of this work was to obtain photoactivatable nonpeptide antagonists of the angiotensin II AT(1) receptor. Based on structure-function relationships, two chemical structures as well as appropriate synthetic schemes were chosen as a frame for the design of radiolabeled azido probes. The feasibility of the strategy was first assessed by the synthesis of two tritiated ligands 21 and 22 possessing
这项工作的目的是获得血管紧张素II AT(1)受体的光活化非肽拮抗剂。基于结构-功能关系,选择了两个化学结构以及适当的合成方案作为设计放射性标记叠氮基探针的框架。该策略的可行性首先通过两个tri代的配体21和22的合成来评估,这些配体对AT(1)受体具有高亲和力,并且对膜或细胞制剂的非特异性结合率低。然后,我们准备了两个未标记的叠氮基衍生物7和14,它们对AT(1)受体的亲和力很高。后一种化合物被证明适用于受体不可逆标记,并以tri化形式制备。28 tri化叠氮基非肽探针显示K(d)值为11.8 nM,非特异性结合率低。它适用于在CHO细胞中稳定表达的重组AT(1A)受体的特异性和有效共价标记。专门标记的实体的电泳图谱与用生物素化的肽可光激活探针光标记的纯化受体的电泳图谱完全相同。这种新工具应可用于非肽受体结合位点的作图。根据G蛋白偶联受体激活和失活的分子机制的当前知识讨论这些潜在的应用程