Interactions of aromatic mannosyl disulfide derivatives with Concanavalin A: synthesis, thermodynamic and NMR spectroscopy studies
作者:Bandaru Narasimha Murthy、Sharmistha Sinha、Avadhesha Surolia、Narayanaswamy Jayaraman、László Szilágyi、Ildikó Szabó、Katalin E. Kövér
DOI:10.1016/j.carres.2009.06.008
日期:2009.9
alpha-D-Mannopyranosyl units were attached to an aromatic scaffold through disulfide linkages to obtain mono- to trivalent glycosylated ligands for lectin binding studies. Isothermal titration calorimetric (ITC) measurements indicated that binding affinities of these derivatives to Concanavalin A (Con A) were comparable to or slightly higher than that of methyl alpha-D-mannopyranoside (K(a) values in the range of
通过二硫键将α-D-甘露吡喃糖基单元连接到芳香族骨架上,以获得用于凝集素结合研究的单价至三价糖基化配体。等温滴定热法(ITC)测量表明,这些衍生物与伴刀豆球蛋白A(Con A)的结合亲和力与甲基α-D-甘露吡喃糖苷(K(a)值在10(4)范围内)相当或稍高。 M(-1))。凝集素-配体配合物的化学计量与相应配体的形式价(1-3)一致,表明与二价和三价衍生物相互作用时发生交联。但是,后者无法观察到多价效应。使用饱和转移差异(STD)NMR竞争实验显示,这些配体与Con A的碳水化合物结合位点结合。