Picomolar inhibition of cholera toxin by a pentavalent ganglioside GM1os-calix[5]arene
作者:Jaime Garcia-Hartjes、Silvia Bernardi、Carel A. G. M. Weijers、Tom Wennekes、Michel Gilbert、Francesco Sansone、Alessandro Casnati、Han Zuilhof
DOI:10.1039/c3ob40515j
日期:——
Cholera toxin (CT), the causative agent of cholera, displays a pentavalent binding domain that targets the oligosaccharide of ganglioside GM1 (GM1os) on the periphery of human abdominal epithelial cells. Here, we report the first GM1os-based CT inhibitor that matches the valency of the CT binding domain (CTB). This pentavalent inhibitor contains five GM1os moieties linked to a calix[5]arene scaffold
霍乱的致病菌霍乱毒素(CT)具有五价结合结构域,该结构域靶向于霍乱的寡糖。 神经节苷脂GM1(GM1os)在人腹部上皮细胞的周围。在这里,我们报告了第一个基于GM1os的CT抑制剂,它与CT结合域(CTB)的化合价匹配。这种五价抑制剂含有五个与杯[5]芳烃骨架相连的GM10s部分。通过抑制分析评估时,它对CTB的抑制作用为皮摩尔级(IC 50 = 450 pM)。这代表了显着的多价效应,与单价GM1os衍生物相比,相对抑制能力为100000,这使GM1os-calix [5] arene成为最有效的CTB抑制剂之一。