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Nanoparticle-supported temperature responsive polymer brushes for affinity separation of histidine-tagged recombinant proteins

机译:用于组氨酸标记重组蛋白的亲和分离的纳米粒子支持的温度响应性聚合物刷子

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摘要

We developed a modular approach for the preparation of nanoparticle-supported polymer brushes carrying repeating iminodiacetate units for affinity separation of histidine-tagged recombinant proteins. The nanoparticle-supported polymer brushes were prepared via the combination of surface-initiated atom transfer radical polymerization with Cu(I)-catalyzed azide–alkyne cycloaddition reaction. The nanocomposite materials were characterized to determine the particle size, morphology, organic content, densities of polymer chains and the affinity ligand. Protein binding assay illustrated that the iminodiacetate-rich polymer brushes enable to selectively bind histidine-tagged recombinant proteins in the presence of abundant interfering proteins. More importantly, the protein binding capacity can be tuned by adjusting the environmental temperature.
机译:我们开发了一种模块化方法,用于制备纳米颗粒负载的聚合物刷,其携带重复的氨基乙二醇酯单元进行组氨酸标记重组蛋白的亲和分离。 通过用Cu(I)的表面引发的原子转移自由基聚合的组合制备纳米颗粒负载的聚合物刷 - 催化叠氮化物 - 炔环加油反应。 纳米复合材料的特征在于确定粒度,形态,有机含量,聚合物链密度和亲和力配体。 蛋白质结合测定说明了富含亚氨基乙酸酯的聚合物刷子能够在丰富的干扰蛋白存在下选择性地结合组氨酸标记的重组蛋白。 更重要的是,可以通过调节环境温度来调谐蛋白质结合能力。

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