在有分支的芳香性橄胺折叠体中,相对螺旋-螺旋构造
Nicolas Delsuc1, Stéphane Massip, Jean-Michel Léger
1Institut Européen de Chimie et Biologie, Université de Bordeaux-CNRS UMR5248 and UMS3033, 2 rue Robert Escarpit, 33607 Pessac, France.
Journal of the American Chemical Society
|February 11, 2011
概括
设计复杂的alpha-peptidic折叠架构是一项挑战. 这项研究使用稳定的螺旋形基胺来创建可预测的分支结构,使得我们能够对分子相互作用和设计有新的见解.
科学领域:
- 超分子化学 超分子化学
- 有机合成 有机合成
- 化学生物学 化学生物学
背景情况:
- 大型,有组织的,三级类的alpha-peptidic折叠架构的de novo设计受到二级图案稳定性较弱的阻碍.
- 从8-amino-2-quinoline carboxylic acid中衍生出来的橄胺具有稳定的螺旋结构,为可预测的折叠提供了潜在的解决方案.
- 分支架构是创建复杂,稳定的折叠结构的关键.
研究的目的:
- 设计和合成使用稳定的螺旋形基胺的分支架构.
- 研究这些分支结构中的结构偏好,动态和相互作用.
- 探索螺旋手性,方向和间隔器形状对整体结构和稳定的影响.
主要方法:
- 通过乙烯糖醇间隔器连接的不同寡合体长度 (四度,五度,八度) 的分支架构的合成.
- 固态结构分析 (例如,X射线晶体学) 来捕捉各种形状.
- 溶液状态调查 (例如,NMR光谱) 来研究形状动态和偏好.
- 分析螺旋-螺旋通信和侧链互数字化效应.
主要成果:
- 成功合成了具有定义自由度 (P/M手性,螺旋方向,间隔形状) 的分支基胺结构.
- 在固体和溶液状态下详细的结构和动态表征揭示了形状偏好.
- 根据溶剂和侧链相互作用,证明了螺旋-螺旋手性通信的证据.
- 观察到,侧链间接限制了间隔器的旋转,影响了整体结构.
结论:
- 稳定的螺旋形胺为设计复杂,有组织的α-基架构提供了强大的平台.
- 了解形态动力学和螺旋间相互作用对于精确的分子设计至关重要.
- 一个高度对称的固态结构为未来设计中开发特定的,定向的侧链相互作用提供了基础.
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