A New Class of Inhibitors for the Malarial Aspartic Protease Plasmepsin II Based on a Central 11-Azatricyclo[6.2.1.02,7]undeca-2,4,6-triene Scaffold
作者:David A. Carcache、Simone R. Hörtner、Andreas Bertogg、François Diederich、Arnulf Dorn、Hans Peter Märki、Christoph Binkert、Daniel Bur
DOI:10.1002/hlca.200390177
日期:2003.6
4-arylpiperidines – including the unlocking of a new hydrophobic (flap) pocket – were modeled. The sequence identity of 35% between mature renin and PMII had prompted us to hypothesize that an induced-fit adaptation around the active site as observed in renin might also be effective in PMII. The new inhibitors contain a central 11-azatricyclo[6.2.1.02,7]undeca-2(7),3,5-triene core, which, in protonated form,
通过基于结构的从头设计,开发了一种新型的,高达单个数微摩尔活性(IC 50值)的疟疾天冬氨酸蛋白酶-纤溶酶II(PMII)的非肽类抑制剂。设计中使用的活性部位基质基于PMII的X射线晶体结构,在4-芳基哌啶络合后,肾素结构上看到的主要构象变化–包括解锁新的疏水性(瓣)口袋–被建模。成熟的肾素和PMII之间35%的序列同一性促使我们假设,如在肾素中观察到的,围绕活性位点的诱导适应适应在PMII中也可能有效。新的抑制剂含有一个中心的11-氮杂三环[6.2.1.0 2,7] undeca-2(7),3,5-三烯核,质子化形式,与两个PMII活性位点的催化Asp残基进行离子H键合(图1和2)。通过活化的吡咯和就地产生的苯并species物质之间的狄尔斯-阿尔德反应,可以容易地制备该三环支架(方案1)。两个与萘基或1,3-苯并噻唑基部分取代基连接到中央芯体(方案1 - 4),用于容纳在疏水襟翼和S1