一种超分子冰增长抑制剂
Ran Drori1, Chao Li1, Chunhua Hu1
1Department of Chemistry and Molecular Design Institute, New York University , New York, New York 10003, United States.
Journal of the American Chemical Society
|September 13, 2016
概括
一种合成染料,SAFRANINE O抑制了冰晶的生长,其活性与抗糖蛋白相当. 这种染料
科学领域:
- 生物物理
- 材料科学
- 晶体学
背景情况:
- 抗糖蛋白 (AFGP) 是高度进化的蛋白质,可以抑制冰的再结晶和热歇斯底里.
- 导致AFGP活动的分子机制,特别是它们与冰晶表面的相互作用,是复杂的,并未完全理解.
- 具有结冰能力的小分子可以为冷保护和控制冰提供替代策略.
研究的目的:
- 为了研究一种合成染料沙弗兰因O的冰增长抑制特性.
- 为了阐明沙夫兰酸与冰晶相互作用的机制.
- 探索小分子自组与冰结合活动之间的潜在联系.
主要方法:
- 冰的增长抑制测试.
- 光谱分析 (UV-Vis,光)
- 分子动力学和元动力学模拟.
- 一个单晶X射线衍射.
主要成果:
- 在毫米度下,沙弗兰因O显著抑制冰的生长,相当于AFGP.
- 它诱导热歇斯底里 (TH) 并改变冰晶形态,形成双形针.
- 沙弗兰因O与冰形成可逆相互作用,并在水溶液中自组成30个分子的堆.
- 模拟和X射线结构显示聚合物中的替代物有规律的间隔,模仿AFGP结冰点.
结论:
- 沙弗兰因O显示出强大的冰的增长抑制,这表明小分子可以复制复杂生物分子的功能.
- 观察到的结结冰活动与萨夫兰因O自组合成有组织的超分子结构有关.
- 这项研究揭示了小分子聚合与类似蛋白质的结冰机制之间的意想不到的联系,为冷保护剂设计开辟了新的途径.
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