电子替代剂对含氨酸的循环的构成的影响
Akiko Asano1, Yukiko Kawanami1, Mao Fujita1
1Faculty of Pharmacy, Osaka Medical and Pharmaceutical University 4-20-1 Nasahara, Takatsuki Osaka 569-1094 Japan akiko.asano@ompu.ac.jp +81-72-690-1005 +81-72-690-1066.
RSC advances
|January 4, 2024
概括
循环的替代剂控制着形和CHπ相互作用. 电子捐赠组通过影响氨侧链来促进折叠.
科学领域:
- * 超分子化学
- * 医学化学 医学化学
- * 计算化学 计算化学
背景情况:
- * 循环具有结构灵活性,存在于不同形式之间的平衡状态.
- * 涉及氨酸 (Phe) 和氨酸 (Oxz) 的特定CHπ相互作用影响了折叠的形状.
- *控制这种相互作用是调节结构和功能的关键.
研究的目的:
- * 为了研究电子替代效应对Phe残留物4位的影响.
- * 在循环中调节CHπ相互作用和侧链灵活性.
- * 建立替代剂特性和整体形状之间的关系.
主要方法:
- * 用不同4位置换剂合成Phe结合的循环.
- *核磁共振 (NMR) 谱学用于构造分析和自由能量的确定 (ΔG°).
- *使用哈梅特常数 (σ) 进行量化,以将电子效应与形状变化相关联.
主要成果:
- * 观察到构造自由能量 (ΔG°) 和哈梅特常数 (σ) 之间的线性相关性,表明可预测的替代效应.
- *电子捐赠替代剂增强了CHπ相互作用,有利于折叠的形状.
- * 发现Phe侧链上的替代效应会影响的整体形状和折叠倾向.
结论:
- *在Phe残留物的4位位置上的替代物的电子性质有效地控制了局部构造和CHπ相互作用.
- * 这些局部修饰影响循环的总体构造,表明结构-功能关系.
- * 氨侧链对折叠的性贡献可以通过战略替代剂放置来调节.
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