Targeting a Large Active Site: Structure‐Based Design of Nanomolar Inhibitors of
<i>Trypanosoma brucei</i>
Trypanothione Reductase
作者:Raoul De Gasparo、Ondrej Halgas、Dora Harangozo、Marcel Kaiser、Emil F. Pai、R. Luise Krauth‐Siegel、François Diederich
DOI:10.1002/chem.201901664
日期:2019.9.2
73 nm, which is fully selective against human glutathione reductase (hGR). The best ligands exhibited in vitro IC50 values (half-maximal inhibitory concentration) against the HAT pathogen, T. brucei rhodesiense, in the mid-nanomolar range, reaching down to 50 nm. X-Ray co-crystal structures confirmed the binding mode of the ligands and revealed the presence of a HEPES buffer molecule in the large active
锥虫酮还原酶(TR)在锥虫的独特氧化还原代谢中起着关键作用,锥虫是人类非洲锥虫病(HAT),恰加斯氏病和利什曼病的病原体。向已知的TR抑制剂类中引入新的瘦型脯氨酸载体导致报道最强的布鲁氏锥虫(Trypanosoma(T.)Brucei TR)竞争性抑制剂,其抑制常数Ki为73 nm,对人谷胱甘肽还原酶(hGR)具有完全选择性)。最好的配体在中纳摩尔范围内对HAT病原体T. brucei rhodesiense表现出体外IC50值(半数最大抑制浓度),低至50 nm。X射线共晶结构证实了配体的结合模式,并揭示了HEPES缓冲分子在较大的活性位点中的存在。炔丙基载体的扩展,