在无水离子液体中通过蛋白质聚合物表面活性纳米结构的形成溶解和稳定蛋白质
Alex P S Brogan1, Jason P Hallett1
1Department of Chemical Engineering, Imperial College , London SW7 2AZ , United Kingdom.
Journal of the American Chemical Society
|March 16, 2016
概括
蛋白质工程使干蛋白在干离子液体中溶解,提高高温生物催化剂的酶稳定性. 这一突破克服了非水性介质的溶解性和稳定性挑战.
科学领域:
- 生物催化
- 蛋白质工程
- 离子液体
背景情况:
- 非水性生物催化和离子液体在化学合成中具有价值.
- 在无水离子液体中酶的溶解性和稳定性是很大的挑战.
- 在离子液中开发稳定,可溶性酶对于工业应用至关重要.
研究的目的:
- 设计蛋白质聚合物表面活性纳米结构,以溶解干燥的蛋白质在干燥的离子液体中.
- 评估无水离子液体中的工程蛋白质的结构完整性和稳定性.
- 探索这种方法在高温生物催化剂中的潜力.
主要方法:
- 蛋白质表面工程来创建蛋白质聚合物表面活性纳米结构.
- 在无水离子液体中溶解工程化肌球蛋白.
- 同步辐射循环二极化光谱测量蛋白质稳定性 (半变性温度).
主要成果:
- 使用工程纳米结构,首次成功将干蛋白溶解为干离子液体.
- 在无水离子液体和无水离子液体中,工程化肌球蛋白保留了接近原生结构.
- 与水溶液相比,蛋白质稳定性在离子液体中增加了55°C,超过了水的沸点.
结论:
- 蛋白质聚合物表面活性纳米结构使酶溶解并增强无水离子液体中的稳定性.
- 这种方法克服了非水性生物催化物的关键局限性.
- 这些发现为开发高温和无水溶剂应用的强大的生物催化剂提供了平台.
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