Photopolymerizable glycolipids incorporating ceramide- or amido-type linkers and able to form stable monolayers were efficiently synthesized by chemical and enzymatic methods. Glycolipid polymer films served as platforms for the immobilization of proteins through specific carbohydrate–protein interactions at the air–water interface. Carbohydrate-binding proteins deposited on the glycolipid film were observed by atomic force microscopy, which showed varying submicron-sized protein patterns such as dendrites, dots, and networks, depending on the lipid structure, membrane preparation process, and sugar density of the membrane. Surface plasmon resonance measurement confirmed that the subunit-type lectins immobilized on the glycolipid membranes exhibited the ability to interact specifically with carbohydrate ligands by using unoccupied binding sites.
通过
化学和酶解方法,高效合成了含有神经酰胺或酰胺型连接体并能形成稳定单层的可光聚合的
糖脂。
糖脂聚合物薄膜通过空气-
水界面上特定的
碳水化合物-蛋白质相互作用,成为固定蛋白质的平台。原子力显微镜观察了沉积在
糖脂膜上的
碳水化合物结合蛋白,发现根据脂质结构、膜制备工艺和膜的糖密度不同,蛋白的形态也呈现出树枝状、点状和网状等不同的亚微米级大小。表面等离子共振测量证实,固定在
糖脂膜上的亚单位型凝集素能够利用未被占用的结合位点与
碳水化合物配体发生特异性相互作用。