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Synthesis of thermo-responsive polymer-protein conjugates through disulfide bonding

机译:通过二硫键合成热响应性聚合物-蛋白质偶联物

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摘要

A novel alternative was developed for the synthesis of polymer-protein conjugates with a controllable number of polymer chains. Human serum albumin (HSA), as a model protein, was grafted by poly(N-isopropyl-acrylamide) (PNIPAM) using N-succinimidyl-3-(2-pyridyldithiol) propionate as a coupling agent at room temperature in aqueous media. The influence of grafting number on the stability of the protein-polymer conjugate against the degradation of enzyme was examined, and the temperature dependent bioactivity was monitored through testing the warfarin-binding affinity. Furthermore, the protein could be recovered by incubating the conjugate under reducing conditions to cause the cleavage of the multiple disulfide bonds.
机译:开发了一种新颖的替代方法,用于合成具有可控制数量的聚合物链的聚合物-蛋白质缀合物。在室温下,在水性介质中,使用N-琥珀酰亚胺基-3-(2-吡啶基二硫醇)丙酸酯作为偶联剂,将人血清白蛋白(HSA)作为模型蛋白移植到聚(N-异丙基丙烯酰胺)(PNIPAM)上。考察了接枝数对蛋白质-聚合物缀合物对酶降解稳定性的影响,并通过测试华法林结合亲和力来监测温度依赖性的生物活性。此外,可以通过在还原条件下孵育缀合物以引起多个二硫键的裂解来回收蛋白质。

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