thioaryl glycosides were prepared as inhibitors of the LecA (PA-IL) virulencefactor corresponding to the carbohydrate binding lectin from the bacterial pathogen Pseudomonasaeruginosa. The monosaccharidic arylthio β-D-galactopyranosides served as a common template for the major series that was also substituted at the O-3 position. Arylthio disaccharides from lactose and from melibiose constituted the other
制备了三个小家族的水解稳定的硫代芳基糖苷,作为LecA(PA-IL)毒力因子的抑制剂,该因子对应于细菌病原铜绿假单胞菌的碳水化合物结合凝集素。单糖芳硫基β- D-吡喃半乳糖苷用作主要系列的通用模板,该主要系列也在O -3位置被取代。来自乳糖和蜜二糖的芳硫基二糖构成了另外两个系列成员。尽管LecA的天然配体是具有α- D-半乳糖吡喃糖苷表位的球果糖基神经酰胺的糖脂,但这项研究表明,β- D具有疏水性糖苷配基的β-吡喃半乳糖苷构型可以超越对天然糖的异头构型的要求。凝集素测定法等温滴定微量热连接在一起的酶确定,萘基-1-硫代β- d -galactopyranoside(11)给出了最佳的抑制,其IC 50低于参考甲基α-更好23倍d -galactopyranoside。另外,它的K D为6.3μM,比参考化合物高十倍。还获得了具有11的LecA的X射线晶体结构。