Neopetrosiamide, a 28-residue peptide from Neopetrosia sp., contains three disulfide bonds and hinders mammalian tumor cell invasion. Proper connectivity of disulfide bonds is crucial for activity. Synthetic replacement of single disulfide bridges with methylene bridges gives active analogues. Pre-stapling of one ring enhances the correct formation of the remaining disulfides by reducing isomeric possibilities
Neopetrosiamide 是一种来自Neopetrosia sp. 的 28 个残基肽,含有三个二
硫键,可阻碍哺乳动物肿瘤细胞的侵袭。二
硫键的正确连接对于活性至关重要。用亚
甲基桥合成取代单个二
硫桥得到活性类似物。一个环的预钉合通过减少异构体的可能性并可能启动正确的 3D 折叠来增强剩余二
硫化物的正确形成。新石油
酰胺在大肠杆菌中的克隆和表达提供了获得
天然线性肽的途径。