Development of a new class of proteasome inhibitors with an epoxyketone warhead: Rational hybridization of non-peptidic belactosin derivatives and peptide epoxyketones
作者:Shuhei Kawamura、Yuka Unno、Akira Asai、Mitsuhiro Arisawa、Satoshi Shuto
DOI:10.1016/j.bmc.2014.04.032
日期:2014.6
unstable β-lactone warhead. Peptide epoxyketones are an important class of proteasome inhibitors exhibit high potency in cellular systems based on the efficient α,β-epoxyketone warhead. Importantly, belactosin derivatives bind primarily to the primed binding site, while peptide epoxyketones bind only to the non-primed binding site of proteasome, suggesting that hybridization of them might lead to the
蛋白酶体抑制剂作为抗癌药物的候选者目前是越来越受到关注的焦点。我们最近对肽类天然产物贝洛糖素A进行了系统的结构-活性关系研究,并确定了非肽类衍生物2是高效的蛋白酶体抑制剂。但是,对细胞生长的抑制作用为2β-内酯弹头是中等生物,可能是由于生物学上不稳定。肽环氧酮是一类重要的蛋白酶体抑制剂,它基于有效的α,β-环氧酮战斗部,在细胞系统中显示出很高的效能。重要的是,Belactosin衍生物主要与引发的结合位点结合,而肽环氧酮仅与蛋白酶体的非引发的结合位点结合,这表明它们的杂交可能导致新型蛋白酶体抑制剂的发展。因此,我们通过合理的基于结构的设计成功地鉴定了蛋白酶体抑制剂3和4的新型化学型,它们有望与蛋白酶体的引发和非引发结合位点结合。