细胞外电子吸收通过H2O2进行介导
Yilian Han1, Chengmei Liao1,2, Xinlei Jiang3
1MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
微生物电子转移产生可再生能源. 使用过氧化 (H2O2) 和催化酶 (katG) 的新途径占生物电流的45%,增强了生物电力生产.
科学领域:
- 微生物学 微生物学
- 电化学 电化学 电化学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 微生物电子转移是一种有前途的可再生能源.
- 了解细胞外电子转移机制,特别是氧气减少,至关重要.
- 目前关于微生物从阴极吸收电子的知识还不完全.
研究的目的:
- 阐明微生物从氧降解的阴极吸收电子的机制.
- 确定有助于生物电化学电流生成的新途径.
- 为了研究过氧化 (H2O2) 在微生物呼吸中的作用.
主要方法:
- 使用电化学技术研究微生物细胞外电子转移.
- 量化了一种新的H2O2介导途径对生物流的贡献.
- 分析了catalase (katG) 在观察到的生物电化学过程中的作用.
- 操纵了阴极氧气减少的选择性,以评估其对生物流的影响.
主要成果:
- 发现了显著的H2O2介导的细胞外电子吸收途径.
- 这种途径在总生物流中贡献了高达45%.
- 基于H2O2的呼吸需要电子供应和催化酶katG.
- 增强双电子氧降解,使生物电流增加了2.4倍.
- 自营生物合成和能量生产途径得到了上调.
结论:
- 在微生物生物电化学呼吸和电子吸收中,H2O2起着至关重要的作用.
- 催化酶katG对于这种依赖H2O2的过程至关重要.
- 优化二电子氧化减排是改善生物电力发电的关键.
- 这项研究为设计高效的生物电力生产系统提供了见解.
更多相关视频
08:57Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases
Published on: February 24, 2018
10:01Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
相关概念视频
Electron Transport Chain: Complex III and IV
Peroxisomes
Peroxisomes and Mitochondria
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within...
The Electron Transport Chain
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Electron Transport Chains
The ETC is comprised of...
Pyruvate Oxidation
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
