Design, Synthesis, and Structure–Activity Relationship Studies of a Potent PACE4 Inhibitor
作者:Anna Kwiatkowska、Frédéric Couture、Christine Levesque、Kévin Ly、Roxane Desjardins、Sophie Beauchemin、Adam Prahl、Bernard Lammek、Witold Neugebauer、Yves L. Dory、Robert Day
DOI:10.1021/jm401457n
日期:2014.1.9
position with arginine mimetics were tested for their inhibitory activity, specificity, stability, and antiproliferative effect. By incorporating d isomers at the P8 position or a decarboxylated arginine mimetic, we obtained analogues with an improved stability profile and excellent antiproliferativeproperties. The DLeu or DNle residue also has improved specificity toward PACE4, whereas specificity was reduced
Novel agmatine and agmatine-like peptidomimetic inhibitors of the West Nile virus NS2B/NS3 serine protease
作者:Huichang Annie Lim、Joma Joy、Jeffrey Hill、Cheng San Brian Chia
DOI:10.1016/j.ejmech.2011.04.055
日期:2011.7
This communication reports the synthesis and inhibitory activities of novel non-covalent peptidomimetic inhibitors of the West Nile virus NS2B/NS3 protease containing a decarboxylated P1 arginine (agmatine; 4-aminobutylguanidine) and related analogues. One agmatine peptidomimetic (4-phenyl-phenacetyl-Lys-Lys-agmatine; compound 2) was shown to be a competitive inhibitor with a binding affinity of Ki
该信息通报了西尼罗河病毒NS2B / NS3蛋白酶的新型非共价拟肽抑制剂的合成和抑制活性,该抑制剂含有脱羧化的P1精氨酸(胍丁胺; 4-氨基丁基胍)和相关类似物。一种胍丁胺肽模拟物(4-苯基-苯乙酰基-Lys-Lys-胍丁胺;化合物2)显示为竞争性抑制剂,结合亲和力为K i 2.05±0.13μM,对凝血酶没有活性(IC 50 > 100μM)。我们的结果表明,与含反应性亲电战斗部的抑制剂相比,由于它们的相对稳定性和化学合成的简便性,在P1位置具有胍丁胺的拟肽可能被用作设计非共价竞争性蛋白酶抑制剂的起始工具。
Optimization of Furin Inhibitors To Protect against the Activation of Influenza Hemagglutinin H5 and Shiga Toxin
作者:Hugo Gagnon、Sophie Beauchemin、Anna Kwiatkowska、Frédéric Couture、François D’Anjou、Christine Levesque、Frédérik Dufour、Adamy Roberge Desbiens、Rolland Vaillancourt、Sylvain Bernard、Roxane Desjardins、François Malouin、Yves L. Dory、Robert Day
DOI:10.1021/jm400633d
日期:2014.1.9
Proprotein convertases (PCs) are crucial in the processing and entry of viral or bacterial protein precursors and confer increased infectivity of pathogens bearing a PC activation site, which results in increased symptom severity and lethality. Previously, we developed a nanomolar peptide inhibitor of PCs to prevent PC activation of infectious agents. Herein, we describe a peptidomimetic approach that increases the stability of this inhibitor for use in vivo to prevent systemic infections and cellular damage, such as that caused by influenza H5N1 and Shiga toxin. The addition of aza beta(3)-amino acids to both termini of the peptide successfully prevented influenza hemagglutinin 5 fusogenicity and Shiga toxin Vero toxicity in cell-based assays. The results from a cell-based model using stable shRNA-induced proprotein convertase knockdown indicate that only furin is the major proprotein convertase required for HAS cleavage.