没有盐的人工水道,具有增强的二极水和质子转移
Erol Licsandru1, Istvan Kocsis1, Yue-Xiao Shen2
1Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes , ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France.
Journal of the American Chemical Society
|April 12, 2016
概括
研究人员开发了模仿水族素 (AQP) 的人工水道,以有效地运输水和质子. 这些性通道具有很高的水透性和离子选择性,接近AQP的性能.
科学领域:
- 仿生化学
- 膜运输
- 纳米技术
背景情况:
- 水素 (AQP) 促进了快速的水运输和离子排斥,但合成模仿物是有限的.
- 在AQP中选择性水转移涉及水线和相关的通道运动.
- 水电线的方向与运输特性之间的定量联系尚不清楚.
研究的目的:
- 设计和描述模仿AQP功能的人工水道.
- 调查导向水线和运输道的作用.
- 量化水和质子运输速率以及离子选择性.
主要方法:
- 对结构数据进行X射线结晶学.
- 测量透性和选择性的双层运输实验.
- 用于定量分析的分子动力学 (MD) 模拟.
主要成果:
- 创建了具有2. 6 Å 孔的人工伊米达四通道.
- 道封装在一个合管道内的定向双极水线.
- 达到~10^6分子/秒/通道的水运输速率,在AQP的两个数量级之内.
- 证明了高质子导电率 (~5 H+/s/通道) 和完全的离子排斥 (质子除外).
结论:
- 人工通道可以有效地模仿AQP的水和质子运输.
- 导向水线和通道性对于高效和选择性的运输至关重要.
- 这些发现促进了生物应用合成通道的设计.
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