Discovery of a potent and highly β1 specific proteasome inhibitor from a focused library of urea-containing peptide vinyl sulfones and peptide epoxyketones
作者:Wouter A. van der Linden、Lianne I. Willems、Tamer B. Shabaneh、Nan Li、Mark Ruben、Bogdan I. Florea、Gijs A. van der Marel、Markus Kaiser、Alexei F. Kisselev、Herman S. Overkleeft
DOI:10.1039/c1ob06554h
日期:——
Syringolins, a class of natural products, potently and selectively inhibit the proteasome and show promising antitumour activity. To gain insight in the mode of action of syringolins, the ureido structural element present in syringolins is incorporated in oligopeptide vinyl sulfones and peptide epoxyketones yielding a focused library of potent new proteasome inhibitors. The distance of the ureido linkage with respect to the electrophilic trap strongly influences subunit selectivity within the proteasome. Compounds 13 and 15 are β5 selective and their potency exceeds that of syringolin A. In contrast, 5 may well be the most potent β1 selective compound active in living cells reported to date.
甾环蛋白(syringolin)是一类天然产物,能强效且特异性地抑制蛋白酶体,并展现出有前景的抗肿瘤活性。为了深入了解甾环蛋白的作用机制,我们在寡肽乙烯砜和肽环氧酮中引入甾环蛋白中存在的脲环结构单元,从而产生了一系列强效的新型蛋白酶体抑制剂。脲环连接位点相对于亲电陷阱的距离,强烈影响蛋白酶体亚基的选择性。化合物13和15对β5亚基具有选择性,其效力超过了甾环蛋白A。相比之下,化合物5可能是迄今为止报道的在活细胞中活性最强的β1亚基选择性化合物。