普罗林替代/纳入对自组装β片形成的纳米结构的影响
Jacek K Wychowaniec1,2, Martin Šrejber3, Niting Zeng1
1Department of Materials, Manchester Institute of Biotechnology, School of Natural Sciences, Faculty of Science and Engineering, The University of Manchester UK.
RSC advances
|November 28, 2024
概括
在自我组装的中加入proline会破坏β-片的形成和凝. 然而,改性仍然形成具有独特纳米结构的水凝,为蛋白质折叠和材料设计提供了洞察力.
科学领域:
- 生物材料科学 生物材料科学
- 超分子化学 超分子化学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 自组装对于创建纳米结构和水凝至关重要.
- 调节序列允许合理调整纳米结构形态和水凝网络拓.
- 了解氨基酸对自组合的影响,是新材料设计的关键.
研究的目的:
- 为了研究素的影响,一个已知的β-片拆解氨基酸,对两性的自我组装和凝性质.
- 探索序列的修改如何影响纳米结构的形成和水凝的特性.
主要方法:
- 合成和修改beta片形成FEFKFEFK (F8) 与 (P) 形成FEFKPEFK (FP),FEFKPEFKF (KPE) 和FEFEPKFKF (EPK).
- 使用各种度和pH条件,对自组装和凝特性进行表征.
- 利用传输电子显微镜 (TEM),原子力显微镜 (AFM),小角度X射线散射 (SAXS),广角X射线散射 (WAXS) 和分子动力学模拟.
主要成果:
- 在FP中加入的proline破坏了β-sheet的形状,即使在高度 (100毫克mL-1) 中也阻止了凝,而F8 (5毫克mL-1).
- 在特定的pH条件下,KPE和EPK,保留了四个氨酸残留物,在30毫克mL-1下形成了具有部分β片结构的基.
- KPE自组装成纳米丝带,而EPK形成扭曲的纳米纤维,由移动的电荷密度和不同的化学环境驱动.
结论:
- 用proline替代单个氨基酸显著改变了的自我组装和凝行为.
- 改性KPE和EPK显示出由于序列特异性电荷分布而形成独特的纳米结构 (纳米丝带和纳米纤维) 的能力.
- 这些发现为蛋白质折叠机制提供了宝贵的见解,并为设计用于生物医学应用的先进材料打开了道路.
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