用原子精度识别客分子的无生物折叠体序列的代进化
Guillaume Lautrette1,2, Barbara Wicher1,2, Brice Kauffmann3,4,5
1University of Bordeaux, CBMN, UMR 5248, Institut Européen de Chimie Biologie , 2 rue Escarpit, 33607 Pessac, France.
Journal of the American Chemical Society
|July 19, 2016
概括
研究人员设计了一种合成折叠体受体,可以选择性地与酸结合. 这项分子识别成果突显了理性设计在制造高度特异性的分子传感器方面的力量.
科学领域:
- 超分子化学
- 有机化学
- 化学生物学
背景情况:
- 折叠体是模仿蛋白质结构的合成寡合体.
- 设计类似分子的选择性受体仍然是一个挑战.
- 芳香胺折叠剂提供可调的识别特性.
研究的目的:
- 开发一种对酸具有高度亲和力和选择性的折叠体受体.
- 研究基于结构的序列修改以进行分子识别.
- 展示折叠机化学中的理性设计原则.
主要方法:
- 一个螺旋式芳香胺折叠剂的基于结构的序列演变.
- 七个修改后的折叠机序列的代合成.
- 使用X射线结晶学和NMR光谱学等技术对宿主-客体结构进行详细的研究.
- 对结合亲和力和选择性的系统评估.
主要成果:
- 在选择性上实现了反转,从酸偏好 (>10^2) 转变为酸偏好 (>10^2).
- 显著增强对酸的结合亲和力,尽管其极性识别特征较少.
- 在结构相似的分子 (酸与葡萄酸) 之间进行了高水平的区分.
结论:
- 折叠分子非常容易接受分子识别的挑战.
- 合理的设计利用折叠器模块化,可以精确控制客串.
- 芳胺折叠体是合成可用的,结构可预测的,并且可以进行详细的结构阐明.
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