Design, Synthesis, and in Vitro Biological Evaluation of Small Molecule Inhibitors of Estrogen Receptor α Coactivator Binding
作者:Alice L. Rodriguez、Anobel Tamrazi、Margaret L. Collins、John A. Katzenellenbogen
DOI:10.1021/jm030404c
日期:2004.1.1
interaction was not with the ligand binding pocket. The most effective CBIs were those from the pyrimidine family, the best binding with K(i) values of ca. 30 microM. The trithiane- and cyclohexane-based CBIs appear to be poor structural mimics, because of equatorial vs axial conformational constraints, and the triazene-based CBIs are also conformationally constrained by amine-substituent-to-ring resonance
与激动剂配体复合的核受体(NRs)通过募集共激活蛋白复合物来激活转录。原则上,应该使用适当设计的共激活因子结合抑制剂(CBI)直接阻止这种转录关键受体-共激活因子的相互作用,从而抑制NRs的转录活性。为了指导我们各种CBI的设计,我们使用了激动剂结合的雌激素受体(ER)配体结合结构域(LBD)的晶体结构,该结构与含有LXXLL签名基元并结合到表面疏水槽的助活化剂肽复合的LBD。一组基于从外而内的设计方法的CBI,具有各种杂环核心(三氮烯,嘧啶,三硫杂环己烷,环己烷),它们模仿肽螺旋上三个亮氨酸的系链位点,在其上连接有亮氨酸残基样取代基。另一组基于“由内而外”的方法,具有一个萘核,该萘核模拟两个最深埋的亮氨酸,其取代基向外延伸,以模拟共活化剂螺旋肽的其他特征。开发了一种基于荧光各向异性的共激活剂竞争测定法,以测量这些CBI与ER激动剂复合物与共激活剂相互作用的凹槽位点的特异性结合。对照配体结