Design, Synthesis, and Characterization of Cyclic Peptidomimetics of the Inducible Nitric Oxide Synthase Binding Epitope That Disrupt the Protein–Protein Interaction Involving SPRY Domain-Containing Suppressor of Cytokine Signaling Box Protein (SPSB) 2 and Inducible Nitric Oxide Synthase
作者:Jitendra R. Harjani、Beow Keat Yap、Eleanor W. W. Leung、Andrew Lucke、Sandra E. Nicholson、Martin J. Scanlon、David K. Chalmers、Philip E. Thompson、Raymond S. Norton、Jonathan B. Baell
DOI:10.1021/acs.jmedchem.6b00386
日期:2016.6.23
have been found to exhibit prolonged expression of inducible nitric oxide synthase (iNOS) and enhanced killing of persistent pathogens, suggesting that inhibitors of the SPSB2−iNOS interaction have potential as novel anti-infectives. In this study, we describe the design, synthesis, and characterization of cyclic peptidomimetic inhibitors of the SPSB2–iNOS interaction constrained by organic linkers
已发现含有SPRY域的细胞因子信号转导盒蛋白(SPSB)2抑制因子的巨噬细胞表现出诱导型一氧化氮合酶(iNOS)的延长表达和对持久性病原体的杀灭作用增强,这表明SPSB2-iNOS相互作用的抑制剂具有潜在的潜力。作为新型抗感染药。在这项研究中,我们描述了受有机连接物限制的SPSB2-iNOS相互作用的环状拟肽抑制剂的设计,合成和表征,以提高稳定性和可药物性。SPR,ITC和19 F NMR分析表明,最有效的环状拟肽以低纳摩尔亲和力(K D 29 nM)结合到SPSB2的iNOS结合位点,比线性肽DINNN(KD 318 nM),并在巨噬细胞裂解物中显示出对SPSB2-iNOS相互作用的强烈抑制作用。这项研究例证了一种新型的环II型β-转角线性肽的方法,并为该类抑制剂作为新的抗感染剂的未来开发奠定了基础。