Biological Evaluation and X-ray Co-crystal Structures of Cyclohexylpyrrolidine Ligands for Trypanothione Reductase, an Enzyme from the Redox Metabolism of Trypanosoma
作者:Raoul De Gasparo、Elke Brodbeck-Persch、Steve Bryson、Nina B. Hentzen、Marcel Kaiser、Emil F. Pai、R. Luise Krauth-Siegel、François Diederich
DOI:10.1002/cmdc.201800067
日期:2018.5.8
were freely soluble and showed competitive inhibition constants (Ki) against Trypanosoma (T.) brucei TR and T. cruzi TR and in vitro activities (half‐maximal inhibitory concentration, IC50) against these parasites in the low micromolar range, with high selectivity against human glutathione reductase. X‐ray co‐crystal structures confirmed the binding of the ligands to the hydrophobic wall of the “mepacrine
人类非洲锥虫病,南美锥虫病和各种形式的利什曼病是热带疾病,是由锥虫病家族的寄生虫引起的。这些原生动物具有独特的氧化还原代谢,该代谢基于锥虫硫烷和锥虫硫醇还原酶(TR),使TR成为有前途的药物靶标。我们通过基于结构的设计报告了TR的环己基吡咯烷抑制剂的性能和效能的优化。最好的抑制剂是可自由溶解的,并显示出对锥虫(T.)brucei TR和T. cruzi TR的竞争抑制常数(K i)和体外活性(半数最大抑制浓度,IC 50)在低微摩尔范围内对这些寄生虫具有抗人谷胱甘肽还原酶的高选择性。X射线共晶结构证实了配体与“ mepacrine结合位点”的疏水壁的结合,并且具有面向大活性位点表面的新的可提供溶解度的载体。