Macrocyclic Oxindole Peptide Epoxyketones─A Comparative Study of Macrocyclic Inhibitors of the 20S Proteasome
作者:Marion G. Götz、Kacey Godwin、Rachel Price、Robert Dorn、Gabriel Merrill-Steskal、William Klemmer、Hunter Hansen、Gautam Produturi、Megan Rocha、Mathias Palmer、Lea Molacek、Zack Strater、Michael Groll
DOI:10.1021/acsmedchemlett.4c00017
日期:2024.4.11
as protease inhibitors due to their metabolic stability and specificity. However, the development of peptide macrocycles with improved binding potency has so far been challenging. Here we present macrocyclic peptides derived from the clinically applied proteasome inhibitor carfilzomib with an oxindole group that mimics the natural product TMC-95A. Fluorescence kinetic activity assays reveal a high potency
由于其代谢稳定性和特异性,肽大环化合物最近作为蛋白酶抑制剂而受到关注。然而,迄今为止,开发具有改进的结合效力的肽大环化合物仍然具有挑战性。在这里,我们展示了源自临床应用的蛋白酶体抑制剂卡非佐米的大环肽,其具有模仿天然产物TMC-95A的羟吲哚基团。荧光动力学活性测定表明,与缺乏该基序的试剂相比,羟吲哚基团具有较高的效力(IC 50 = 0.19 μM)。酵母 20S 蛋白酶体 β5 亚基配体的 X 射线结构表明,安装的大环迫使羟吲哚基团与 β5-Gly23NH 形成强氢键。因此,与卡非佐米等更灵活的蛋白酶体抑制剂相比,我们设计的羟吲哚环氧酮的结合在熵和热函上是有利的。