奥利戈 (Oligo) (N-aryl glycines):对结构化类的新变化
Neel H Shah1, Glenn L Butterfoss, Khanh Nguyen
1Department of Chemistry, Center for Genomics & Systems Biology, New York University, New York, New York 10003, USA.
Journal of the American Chemical Society
|December 4, 2008
概括
N-aryl侧链通过促进跨胺基键来稳定类寡合体,从而减少构造异质性. 这一策略使得能够合理设计新的仿生折叠结构.
科学领域:
- 生物模拟化学是生物模拟化学.
- 聚合物科学 聚合物科学
- 结构生物学是结构生物学.
背景情况:
- N-置换的甘氨酸类寡合体 (类) 是生物模拟折叠体,能够形成螺旋结构.
- 这些折叠体通常表现出由于 cis/trans 胺基键异构化的结构异质性.
- N-基侧链很常见,但控制形仍然是一个挑战.
研究的目的:
- 开发用于增强类寡合体中的构造性排序的策略.
- 调查使用N-aryl侧链来强化结构稳定性的使用.
- 为了使生物仿真系统中的新结构图案能够合理地进行de novo设计.
主要方法:
- 使用氨酸衍生物和乙酸进行N-aryl甘氨酸寡合物的固体相合成.
- 量子力学计算分析折叠景观和胺键偏好.
- 射线晶体学和溶液核磁共振 (NMR) 光谱学用于结构验证.
- 分子建模用于预测螺旋结构.
主要成果:
- N-aryl 侧链强化了对跨胺基键的强烈能量偏好,增强了结构稳定性.
- 合成的N-aryl甘氨酸寡合体表现出减少的形状异质性.
- 分子建模表明,线性寡合体可以采用聚烯II型状结构.
- 宏观环形结构证实了在N-aryl位置直接转氨基键的能力.
结论:
- N-aryl侧链是一种有效的工具,用于控制体构造和促进结构稳定性.
- 这种方法有助于合理设计新的生物模拟折叠机架构.
- 这些发现代表了基于peptoid的材料设计领域的重大进展.
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