Design of a Gag Pentapeptide Analogue that Binds Human Cyclophilin A More Efficiently than the Entire Capsid Protein: New Insights for the Development of Novel Anti-HIV-1 Drugs
作者:Quan Li、Mireille Moutiez、Jean-Baptiste Charbonnier、Karine Vaudry、André Ménez、Eric Quéméneur、Christophe Dugave
DOI:10.1021/jm9903139
日期:2000.5.1
domain of Gag. We synthesized a series of heptapeptides to test the energetic contribution of amino acids besides the Gly-Pro moiety. In particular the importance of the histidine residue for the interaction was underscored. We also investigated the influence of N- and C-terminal modifications. Hexapeptides containing either deaminovaline (Dav) in place of the N-terminal valine or substitution of the
亲环蛋白A(hCyp-18)是一种普遍存在的胞质肽基脯氨酰顺/反异构酶(PPIase),可协调HIV-1核心包装。hCyp-18,整合到病毒粒子中,可实现核心脱壳和RNA释放,因此在病毒复制过程中起关键作用。hCyp-18通过九个氢键网络特异性地与Gag多蛋白衣壳域的单个暴露环相互作用,该网络主要涉及该环的7-mer片段。如先前报道,相应的线性七肽Ac-Val-His-Ala-Gly-Pro-Ile-Ala-NH(2)(2)以低亲和力与hCyp-18结合(IC(50)= 850 +/- 220 microM),但相对于hFKBP-12(另一种丰富的PPIase)对hCyp-18具有潜在的有用选择性。根据Gag片段:hCyp-18复合物的X射线结构,我们产生了一系列修饰的肽,以探测相互作用的决定因素,从而选择显示出比Gag衣壳结构域更高亲和力的肽配体。我们合成了一系列七肽,以测试除Gly-P