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单分散脂双层的定向自组装纳米光盘与控制大小的纳米光盘
I G Denisov1, Y V Grinkova, A A Lazarides
1Departments of Biochemistry and Chemistry and the Beckman Institute, University of Illinois, Urbana, Illinois 61801, USA.
Journal of the American Chemical Society
|March 18, 2004
概括
研究人员通过控制膜支架蛋白 (MSP) 长度,制造了Nanodiscs,即具有两层脂质的可溶性纳米粒子. 这种方法允许精确调整纳米光盘尺寸和组成,用于各种应用.
科学领域:
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 自组装过程使得创建新的纳米结构成为可能.
- 脂质蛋白纳米粒子为生物和材料应用提供了独特的平台.
研究的目的:
- 为了设计和表征纳米光盘,可溶性光盘状脂质/蛋白质颗粒,具有控制的大小和组成.
- 为了研究膜支架蛋白 (MSP) 长度和纳米光盘直径之间的关系.
- 建立一个创建可调节,可溶性纳米粒子的框架.
主要方法:
- 采用了涉及双基酸胆 (DPPC) 和膜支架蛋白 (MSPs) 的自我组装过程.
- 设计和合成扩展和截断的MSP变体.
- 优化了不同MSP的自组装条件.
- 使用高性能液体染色学 (HPLC) 和小角度X射线散射 (SAXS) 进行了纳米盘尺寸和结构的特征.
主要成果:
- 成功准备的单分散式,光盘式纳米光盘,可调节尺寸范围为9.5至12.8纳米.
- 证明MSP长度与纳米光盘直径直接相关,实现狭窄的尺寸分布 (+/-3%).
- 通过溶液散射分析证实了在不同尺寸的纳米盘中存在5.5纳米厚的脂质双层.
- 表明MSP的N端功能化不妨碍均的光盘状结构的形成.
结论:
- 膜支架蛋白螺旋体的长度是纳米磁盘粒子直径的关键决定因素.
- 这项研究提供了一种强大的方法,用于以可溶性纳米颗粒的形式生产具有结构特征的,自组装的脂双层.
- 建立了一个多功能框架,用于合理设计具有可控尺寸的两纳米粒子.
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