Diaryl sulfide-based inhibitors of trypanothione reductase: inhibition potency, revised binding mode and antiprotozoal activities
作者:Bernhard Stump、Christian Eberle、Marcel Kaiser、Reto Brun、R. Luise Krauth-Siegel、François Diederich
DOI:10.1039/b806371k
日期:——
Trypanothione reductase (TR) is an essential enzyme of trypanosomatids and therefore a promising target for the development of new drugs against African sleeping sickness and Chagas' disease. Diaryl sulfides with a central anilino moiety, decorated with a flexible N-alkyl side chain bearing a terminal ammonium ion, are a known class of inhibitors. Using computer modelling, we revised the binding model
锥虫硫磷还原酶(TR)是锥虫的必不可少的酶,因此是开发抗非洲昏睡病和南美锥虫病新药的有希望的目标。具有中心苯胺基部分并用带有末端铵离子的柔性N-烷基侧链修饰的二芳基硫化物是已知的抑制剂。使用计算机建模,我们修改了这类TR抑制剂的结合模型,预测铵离子封端的N-烷基链与同二聚体第二个亚基的Glu18以及Glu465'/ Glu466'同时相互作用,而疏水取代基苯胺环的一部分在Trp21和Met113附近占据“ mepacrine结合位点”。抑制剂支架的羧酸盐结合片段和二芳基硫醚核的系统性改变为提出的结合模式提供了证据。体外研究表明,对布鲁氏锥虫和疟原虫恶性疟原虫的微摩尔至亚微摩尔范围内的低IC(50)值。