Synthesis and Incorporation into Cyclic Peptides of Tolan Amino Acids and Their Hydrogenated Congeners: Construction of an Array of A–B-loop Mimetics of the Cε3 Domain of Human IgE
作者:Daniel A. Offermann、John E. McKendrick、Jimmy J. P. Sejberg、Bingli Mo、Mary D. Holdom、Birgit A. Helm、Robin J. Leatherbarrow、Andrew J. Beavil、Brian J. Sutton、Alan C. Spivey
DOI:10.1021/jo202604q
日期:2012.4.6
for the development of anti asthma therapeutics. Here, we describe the synthesis of an array of conformationally constrained cyclic peptides based on an epitope of the A–B loop within the Cε3 domain of IgE. The peptides contain various tolan (i.e., 1,2-biarylethyne) amino acids and their fully and partially hydrogenated congeners as conformational constraints. Modest antagonist activity (IC50 ∼660 μM)
破坏人免疫球蛋白 E-高亲和力受体 I (IgE-FcεRI) 蛋白质-蛋白质相互作用 (PPI) 是开发抗哮喘疗法的有效策略。在这里,我们描述了基于 IgE Cε3 域内 A-B 环表位的一系列构象受限环肽的合成。肽含有各种tolan(即1,2-二芳基乙炔)氨基酸及其完全和部分氢化的同源物作为构象限制。含有 2,2'-tolan 的肽显示出适度的拮抗剂活性 (IC 50 ∼660 μM),这是通过分子模型预测的,可以最好地模拟 IgE 中天然 A-B 环表位的构象。