Developing high affinity oligosaccharide inhibitors: conformational pre-organization paired with functional group modification
作者:Robert S. McGavin、David R. Bundle
DOI:10.1039/b416106h
日期:——
Intramolecular tethering combined with functional group modification has been investigated as an approach to design high affinity oligosaccharide ligands. The preceding paper reported successful tethering to constrain a trisaccharide in the conformation of its bound state with an antibody and thereby achieved a 15-fold increase in association constant. Here we report the synthesis of two beta-alanyl
分子内束缚与官能团修饰相结合已被研究为设计高亲和力寡糖配体的一种方法。先前的论文报道了成功的束缚,以抗体结合状态约束三糖,从而使缔合常数增加了15倍。在这里,我们报告了两种采用单氯化和单脱氧策略来生成抑制剂的β-丙氨酰系链衍生物的合成,该抑制剂应将目标分子的结合亲和力提高10-25倍,前提是在束缚时自由能的变化是可加性的与功能组更改配对。通过等温滴定量热法测量新配体的结合参数,并通过分子动力学计算和简单的对接分析使结果合理化。数据表明,虽然丙氨酸系链是约束三糖的合理方法,但通过将其与官能团修饰配对获得的自由能增加并没有加成,有时甚至适得其反。