α-helix

拟肽化合物是一类药效团在三维空间中模拟天然肽或蛋白质，并保留与生物靶标相互作用的能力，产生相同的生物效应的化合物。拟肽化合物的设计是为了规避一些天然肽自身存在的问题：如对蛋白水解作用的稳定性(活性持续时间)和较差的生物利用度，某些其他性质，如受体的选择性或效能，往往可以得到很大的改善。拟肽的设计和合成是非常重要的，因为在分子识别和信号传递中，尤其是在生命系统中，肽和蛋白-蛋白相互作用起着主导作用。因此，拟肽类化合物在新药开发中具有巨大潜力。

MCE 拟肽类化合物库包含 377 种小分子化合物，包括类肽，α-螺旋类似物，β-折叠类似物等，是药物发现中研究构效关系不可或缺的工具。

Protein protein interactions (PPI) have pivotal roles in life processes. The studies showed that aberrant PPI are associated with various diseases. However, the design of modulators targeting PPI still faces tremendous challenges, such the difficult PPI interfaces for the drug design, lack of ligands reference, lack of guidance rules for the PPI modulators development and high-resolution PPI proteins structures.

The PPI Library comprises molecules of various sizes, frameworks, and shapes ranging from fragment-like entities to macrocyclic derivatives designed as secondary structure mimetics or as epitope mimetics. The designs cover β-turn / loop mimetics and α-helix mimetics. Since helices present at the interface in 62% of all protein-protein interactions. This library focused on designs including mimics with the substitution geometry of an a-helices, as well as designs that mimic the location of “hot-spot” side chains in helix-mediated PPIs.