自组装纳米架构由蛋白质纳米构建块创建,使用分子间折叠的Dimeric de Novo蛋白质创建
Naoya Kobayashi1, Keiichi Yanase, Takaaki Sato
1Japan Society for the Promotion of Science , Chiyoda, Tokyo 102-8471, Japan.
Journal of the American Chemical Society
|June 30, 2015
概括
研究人员设计了一种名为WA20-foldon的新型蛋白质纳米构建块 (PN-Block),用于自组装纳米结构. 这种蛋白质形成稳定的六合体,十二合体和八合体结构,在合成生物学和纳米技术中显示出潜力.
科学领域:
- 合成生物学 合成生物学
- 蛋白质工程是一种蛋白质工程.
- 纳米技术纳米技术
背景情况:
- 设计自我组装的蛋白质复合体对于合成生物学和纳米技术至关重要.
- 新生蛋白WA20形成了一个不寻常的二维四螺旋束结构.
- 之前的工作描述了WA20的3D结构 (PDB代码3VJF).
研究的目的:
- 为了创建一个蛋白质纳米构建块 (PN-Block) 用于自组装超分子纳米结构.
- 为了将二度 WA20 结构与细菌 T4 纤维素的三度折叠域合并.
- 描述融合蛋白的自我组装特性和由此产生的寡合体形式.
主要方法:
- 在大肠杆菌中蛋白质的表达和净化.
- 生物物理特征技术包括尺寸排除色谱,多角度光散射,分析超离心和小角度X射线散射 (SAXS).
- 从SAXS数据分析对距离分布函数.
主要成果:
- WA20-foldon融合蛋白被成功地表达和净化.
- 确定了稳定的同类聚合体形式:小 (S),中 (M) 和大 (L).
- 萨克斯和其他分析表明,这些形式分别是六合体 (6-mers),十二合体 (12-mers) 和八合体 (18-mers).
- S和M的形状呈现出类似于桶和四面体的形状.
结论:
- 新的WA20折叠蛋白质作为一个有效的构建块,用于创建自组装的人工纳米架构.
- 融合蛋白形成稳定的六倍的寡合体的能力归因于WA20二聚体和折叠子三聚体的组合.
- WA20-foldon证明了在推进纳米技术和合成生物学应用方面具有重大潜力.
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