The epothilones, including epothilones B and D, are macrocyclic lactones, which have potent cytotoxicities and promote the polymerization of tubulin to mictotubules by binding to and stabilizing the tubulin polymer. They have a very similar mechanism of action to paclitaxel (Taxol®). The determination of the microtubule-binding conformation of the epothilones is an important piece of information in designing improved analogs for possible clinical use, and internuclear distance information that will assist the determination of this conformation can be obtained by rotational echo double resonance (REDOR) NMR studies of microtubule-bound epothilones with appropriate stable isotope labels. Analogs of epothilone B and epothilone D with [2H3] and [19F] labels were prepared from an advanced precursor for potential use in REDOR NMR studies to determine internuclear distances in tubulin-bound ligand. Copyright © 2013 John Wiley & Sons, Ltd.
埃博霉素(包括
埃博霉素B和D)属于大环
内酯类化合物,具有强大的细胞毒性,通过与微管蛋白聚合体结合并稳定其结构,促进微管聚合体向微管聚合体的聚合。它们的作用机理与
紫杉醇(Taxol®)非常相似。在改进类似物的设计以用于临床应用时,确定
埃博霉素与微管蛋白的结合构象是一项重要信息,而通过旋转回波双共振(REDOR)核磁共振研究,结合适当的稳定同位素标记,可以获得有助于确定这种构象的核间距离信息。
埃博霉素B和
埃博霉素D的类似物带有[2H3]和[19F]标记,由一种高级前体制备而成,可用于REDOR核磁共振研究,以确定微管蛋白结合
配体中的核间距离。版权所有 © 2013 John Wiley & Sons, Ltd.