α-螺旋多肽构象锁定成核策略

摘要

蛋白质-蛋白质相互作用(PPI)界面较大且相对平坦,通常被认为是无成药性的靶点.生命进程中许多重要的PPI都是通过α-螺旋介导,因此α-螺旋结构的表位模拟物能很好地作用该界面.然而多肽自身构象易变且不稳定,导致其应用受限.Arora等使用成核和交联等策略对α-螺旋多肽进行构象锁定并提升其稳定性和细胞入膜性,使其能靶向胞内PPI界面.目前,多肽构象锁定策略得到了很大发展,已成为多肽领域研究的热点方向.本文综述了近年来α-螺旋多肽的构象锁定成核策略、应用及发展趋势,以期为基于PPI为靶点的药物设计提供理论依据.%Protein-protein interactions(PPI)with large and shallow interfaces are generally undruggable targets. Many PPI in-volved in vital biological processes are mediated by helixes,therefore PPI can be easily targeted by helical epitope mimics. However, the application of peptide was limited by its conformational flexibility and low stability until the significant work was done by Arora ,et al who applied nucleation and crosslinking strategies to lock peptides in helical conformation. The conformation-locked strategies helps to improve peptide stability,cell permeability,and afterwards target intracellular PPI. At present,the conformation-locked strategies of peptides have achieved great development,and have become a hot spot in peptide research field. In this paper,the recent develop-ment,centering nucleation strategies,applications and bright prospects of helical conformation-locked peptides,are reviewed in order to provide theoretical basis for drug design based on PPI.