Ganglioside GM1 mimics: lipophilic substituents improve affinity for cholera toxin
摘要:
Ganglioside GM1 mimics including (R)-2-hydroxy-3-cyclohexylpropionic acid or (R)-2-hydroxy-3-phenylpropionic acid as replacements for NeuAc are stronger cholera toxin binders than the parent ligand 2, which includes (R)-2-hydroxy-propionic acid. (C) 2003 Elsevier Ltd. All rights reserved.
A Simple Model System for the Study of Carbohydrate−Aromatic Interactions
作者:Giancarlo Terraneo、Donatella Potenza、Angeles Canales、Jesus Jiménez-Barbero、Kim K. Baldridge、Anna Bernardi
DOI:10.1021/ja066633g
日期:2007.3.1
establishment of intramolecular interactions between a monosaccharide and a nearby phenyl ring. A group of molecules containing four different monosaccharides (glucose, galactose, N-acetyl-glucosamine, and N-acetyl-galactosamine) was synthesized and used to investigate the extent and nature of this carbohydrate-arene interaction, as well as the effect on the overall 3D structure of the molecules involved. The sugar-aromatic
确定了一种分子支架,它能够在单糖和附近的苯环之间建立分子内相互作用。合成了一组含有四种不同单糖(葡萄糖、半乳糖、N-乙酰-氨基葡萄糖和 N-乙酰-半乳糖)的分子,并用于研究这种碳水化合物-芳烃相互作用的程度和性质,以及对所涉及分子的整体 3D 结构。糖-芳香族距离通过分子模型支持的严格 NMR 研究进行评估,发现在整个系列中是恒定的,与糖的性质和连接两个元素的片段的构象行为无关。B3LYP/DZV(2d,p) 理论水平的从头算计算能够分析相互作用的电子性质。该研究表明,如果有机会,可以建立持久的分子内芳香-糖相互作用,并且可以显着影响整体分子形状和能量。这些结果对寡糖结构模拟物的设计具有重要意义。