Structure-guided approach to identify a novel class of anti-leishmaniasis diaryl sulfide compounds targeting the trypanothione metabolism
作者:Gianni Colotti、Francesco Saccoliti、Marina Gramiccia、Trentina Di Muccio、Jay Prakash、Sunita Yadav、Vikash Kumar Dubey、Giulio Vistoli、Theo Battista、Stefano Mocci、Annarita Fiorillo、Aasia Bibi、Valentina Noemi Madia、Antonella Messore、Roberta Costi、Roberto Di Santo、Andrea Ilari
DOI:10.1007/s00726-019-02731-4
日期:2020.2
reduces trypanothione, a molecule used by the tryparedoxin/tryparedoxin peroxidase system of Leishmania to neutralize the hydrogen peroxide produced by host macrophages during infection. Recently, we solved the X-ray structure of TR in complex with the diaryl sulfide compound RDS 777 (6-(sec-butoxy)-2-((3-chlorophenyl)thio)pyrimidin-4-amine), which impairs the parasite defense against the reactive oxygen
利什曼原虫是利什曼病的病原体,利什曼病是一种被忽视的热带病,由三种主要临床形式组成:内脏利什曼病(VL),皮肤利什曼病和粘膜皮肤利什曼病。VL由东非和印度次大陆的利什曼原虫donovani以及欧洲,北非和拉丁美洲的婴儿利什曼原虫引起,估计每年导致60,000人死亡。锥虫烷还原酶(TR)被认为是寻找抗利什曼病新药的最佳靶标之一。该酶是人类宿主中寄生虫生存的基础,因为它可减少利什曼原虫的Tryparedoxin / tryparedoxin过氧化物酶系统使用的分子锥虫硫醇。中和宿主巨噬细胞在感染过程中产生的过氧化氢。最近,我们与二芳基硫醚化合物RDS 777(6-(仲丁氧基)-2-(((3-氯苯基)硫基)嘧啶-4-胺)配合使用,解决了TR的X射线结构,这损害了寄生虫通过高效抑制TR来防御活性氧。该化合物结合到催化位点,并通过氢键结合更多参与催化的残基,即Glu466',Cys57和Cys52,从而抑制锥虫硫醚的结合。在RDS