An Efficient Approach to the Discovery of Potent Inhibitors against Glycosyltransferases
作者:Kensaku Hosoguchi、Takahiro Maeda、Jun-ichi Furukawa、Yasuro Shinohara、Hiroshi Hinou、Mitsuaki Sekiguchi、Hiroko Togame、Hiroshi Takemoto、Hirosato Kondo、Shin-Ichiro Nishimura
DOI:10.1021/jm100612r
日期:2010.8.12
nucleotide was identified to be the first highly specific inhibitor for rat recombinant α2,3-(N)-sialyltransferase (α2,3ST, IC50 = 8.2 μM), while this compound was proved to become a favorable substrate for rat recombinant α2,6-(N)-sialyltransferase (α2,6ST, Km = 125 μM). Versatility of this strategy was demonstrated by identification of two selective inhibitors for human recombinant α1,3-fucosyltransferase
我们描述了一种标准化的方法,用于通过高通量定量MALDI-TOFMS筛选集中的化合物库来搜索糖基转移酶的有效和选择性抑制剂,该化合物由所需的叠氮基糖核苷酸与各种炔烃进行1,3-偶极环加成而构建。将具有稳定同位素的氨氧基官能化试剂与寡糖缀合,以提供糖肽作为具有增强的离子敏感性的受体底物。新底物的电离效能增强,可在糖基供体底物存在的情况下,基于MALDI-TOFMS进行酶促糖基化的简便分析和定量分析。一种非天然的合成糖核苷酸被确定为大鼠重组α2,3-(N)-唾液酸转移酶(α2,3ST,IC的第一个高度特异性抑制剂50 = 8.2μM),而该化合物被证明是大鼠重组α2,6-(N)-唾液酸转移酶(α2,6ST,K m = 125μM)的有利底物。鉴定两种重组人重组α1,3-岩藻糖基转移酶V(α1,3-FucT,K i = 293 nM)和α1,6-岩藻糖基转移酶VIII(α1,6-FucT,K i