通过合成宿主在水溶液中的N端托芬的电荷介导识别
Meghan E Bush1, Nicole D Bouley, Adam R Urbach
1Department of Chemistry, Trinity University, San Antonio, TX 78212, USA.
Journal of the American Chemical Society
|October 13, 2005
概括
设计的分子现在可以识别水中的特定. 库库尔比特[8]uril (Q8) 和甲基生物 (MV) 形成复合物,可选择性地结合含酸的N终端,对生物传感器的发展有希望.
科学领域:
- 超分子化学 超分子化学
- 化学生物学是化学生物学.
- 分析化学是一种分析化学.
背景情况:
- 在水溶液中分子识别和蛋白质是具有挑战性的.
- 设计的合成宿主提供了选择性结合的潜力.
- 黄瓜 (Q8) 与甲基原体 (MV) 和芳香客体形成异构复合体.
研究的目的:
- 为了研究甲酸中N端酸的识别由黄[8]uril-methyl viologen (Q8.MV) 复合体.
- 描述Q8.MV与各种含醇化合物的结合亲和力,特异性和结合机制.
- 探索在传感和分离方面的潜在应用.
主要方法:
- 异热定位热量计 (ITC) 用于结合热力学.
- 质谱测量用于复杂的识别.
- 紫外线可见,光和1H NMR光谱用于表征.
主要成果:
- Q8.MV证明了与Trp-Gly-Gly (K(a) = 1.3 x 10^5 M^-1) 的高亲和度结合.
- 观察到有选择性的结合,其特异性比Gly-Trp-Gly高6倍,比Gly-Gly-Trp高40倍.
- 的识别受到内醇组附近的静电电荷的影响.
- 复杂的形成诱导了电荷转移带和灭的内极光.
结论:
- 在Q8.MV系统表现出选择性和高亲和度的识别N终端酸.
- 结合是由静电相互作用和一致的结合方式介导的.
- 观察到的光学特性和结合特性对感应和分离技术具有前景.
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