Peptide Based Interleukin-1.BETA. Converting Enzyme(ICE) Inhibitors: Synthesis, Structure Activity Relationships and Crystallographic Study of the ICE-inhibitor Complex.
作者:Yoshinori OKAMOTO、Hideki ANAN、Eiichi NAKAI、Koichiro MORIHIRA、Yasuhiro YONETOKU、Hiroyuki KURIHARA、Hitoshi SAKASHITA、Yoshiya TERAI、Makoto TAKEUCHI、Tadao SHIBANUMA、Yasuo ISOMURA
DOI:10.1248/cpb.47.11
日期:——
Based on the X-ray structure of the complex of Ac-Tyr-Val-Ala-Asp-H (L-709049) and interleukin-1β converting enzyme (ICE), we synthesized compounds which were derived from 2-NapCO-Val-Pro-Asp-CH2OPh (1) to obtain a potent inhibitor in the cell assay. Among these compounds, (3S)-N-methanesulfonyl-3-[[1-[N-(2-naphthoyl)-L-valyl]-L-prolyl]amino]-4-oxobutanamide (27c) showed high potency not only in the enzyme assay but also cell assay with IC50 values of 38 nM and 0.23 μM, respectively. Compound 27c, with a c log P value of 1.76, had more hydrophilic character compared with 1. Compound 27c also dose dependently inhibited LPS-primed ATP-induced IL-1β release in mice. The crystal structure of the complex of compound 27c and ICE revealed that compound 27c had further interactions with ICE in the naphthoyl group at the P4 position and in the methyl group of the methanesulfonamidecarbonyl group at the P1 position, compared with L-709049. To our knowledge, compound 27c is the first example that shows a strong inhibitory activity without the carboxyl group at the P1 position.
根据 Ac-Tyr-Val-Ala-Asp-H (L-709049) 与白细胞介素-1β转换酶 (ICE) 复合物的 X 射线结构,我们合成了由 2-NapCO-Val-Pro-Asp-CH2OPh (1) 衍生的化合物,以获得一种在细胞检测中有效的抑制剂。在这些化合物中,(3S)-N-甲磺酰基-3-[[1-[N-(2-萘甲酰基)-L-缬氨酰]-L-脯氨酰]氨基]-4-氧代丁酰胺(27c)不仅在酶试验中表现出很高的效力,而且在细胞试验中也表现出很高的效力,其 IC50 值分别为 38 nM 和 0.23 μM。化合物 27c 的 c log P 值为 1.76,与 1 相比具有更强的亲水性。化合物 27c 还能剂量依赖性地抑制 LPS-primed ATP 诱导的小鼠 IL-1β 释放。化合物 27c 与 ICE 复合物的晶体结构显示,与 L-709049 相比,化合物 27c 在 P4 位的萘甲酰基和 P1 位的甲磺酰胺羰基的甲基上与 ICE 有进一步的相互作用。据我们所知,化合物 27c 是第一个在 P1 位没有羧基的情况下显示出强烈抑制活性的实例。