作者:Federica Castriconi、Marco Paolino、Alessandro Donati、Germano Giuliani、Maurizio Anzini、Laura Mennuni、Chiara Sabatini、Marco Lanza、Gianfranco Caselli、Francesco Makovec、Maria Sbraccia、Paola Molinari、Tommaso Costa、Andrea Cappelli
DOI:10.1039/c6md00458j
日期:——
5-HT4 receptors are known to form constitutive dimers in membranes. To explore whether multivalency can enhance ligand interactions and/or efficacy in 5-HT4 receptors, the structure of the partial agonist ML10302 was modified with oligo(ethylene glycol) chains, thus generating, by a gradual approach, short and long tethered bivalent or tetravalent ligands and the corresponding spanner-linked monovalent
已知5-HT 4受体在膜中形成本构二聚体。为了探索多价是否可以增强5-HT 4受体中的配体相互作用和/或功效,部分激动剂ML10302的结构被寡聚(乙二醇)链修饰,从而通过渐进的方式产生了短时和长时束缚的二价或四价配体和相应的扳手连接的单价对照。与适当的对照相比,二价和四价配体均显示出10-20倍的结合亲和力增加,但没有多价配体显示出比ML10302本身更大的结合能。此外,对受体-Gs相互作用的直接评估和对cAMP信号传导的研究表明,多价不能增强ML10302的功效。