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在细菌中设计电子导体,用于选择性生物接口和增强能量传输
Alexander R Kelly1, Lorenzo Travaglini1, Dominic J Glover1
1School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
iScience
|February 20, 2026
概括
研究人员为更好的生物电力设计了电致细菌. 表面蛋白质的修改改善了细胞对电极等材料的附着,增强了用于生物传感和微生物电合成的电流产生.
科学领域:
- 微生物学 微生物学
- 生物工程是生物工程.
- 电化学 电化学 电化学
背景情况:
- 电致细菌利用专门的蛋白质复合体,通过细胞膜进行细胞外电子转移.
- 这些微生物在生物发电,生物传感和微生物电合成方面有潜在的应用.
- 这些细胞与功能材料的高效接口对于优化这些应用至关重要.
研究的目的:
- 在电致细菌中设计MtrCAB复合体的MtrC子单元,以增强材料附着.
- 为了使蛋白质能够选择性共价地附着在细菌表面上,以改善生物电力生产.
- 调查表面修改对电子出口和电流生成的影响.
主要方法:
- 通过将SpyTag用于生物结合,对MtrC蛋白进行基因工程.
- 将SpyCatcher与MtrC的融合使得在Shewanella oneidensis和Escherichia coli*上能够将特定的蛋白质附着在MtrCAB复合体上.
- 在MtrC上引入石墨结合序列,以促进对石墨电极的粘附.
主要成果:
- 在工程细菌上,SpyTag的结合使SpyCatcher融合的蛋白质能够对MtrCAB进行特定的共价附着.
- MtrC的修改没有妨碍基本的电子出口功能.
- 石墨结合序列增强了S.oneidensis*对石墨电极的附着,从而使微生物电解细胞的当前产量增加了30%.
结论:
- 在电致电池表面上成功开发了一个可工程化的平台.
- 这个平台为各种生物技术应用程序的生物-非生物接口的操纵提供了便利.
- 工程MtrC蛋白提供了一种多功能工具,用于将电致细菌与功能材料接口,改进生物能源应用.
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