基于细胞色素c的胞外电子传递过程

The process of extracellular electron transfer based on cytochrome c

摘要:

电活性微生物具有独特的胞外电子传递功能，在地球化学循环和环境污染修复中起着重要作用。细胞色素c在电活性微生物胞外电子传递过程中扮演了重要角色，不仅参与直接电子传递途径，还参与电子媒介介导的间接电子传递。其电子传递功能不仅对地球环境中铁、锰、碳等元素的循环具有重要作用，还应用于能源生产、废水处理、生物修复等众多领域，具有良好的应用潜力。本文以电活性微生物的2个模式菌属(希瓦氏菌属和地杆菌属)为例，综述了电活性微生物将电子由胞内转移至胞外的方式和途径，详细阐述了细胞色素c在该胞外电子传递过程中的重要作用，总结了细胞色素c介导的胞外电子传递过程所涉及的分析方法，并对微生物胞外电子传递未来的研究方向提出了展望。

Abstract:

Electroactive microorganisms, with the unique ability of extracellular electron transfer, play a key role in geochemical cycle and environmental remediation. Cytochrome c participates in not only direct but also mediated extracellular electron transfer of electroactive microorganisms. The cytochrome c-mediated electron transfer is essential in the circulation of iron, manganese, carbon and other elements in the earth’s environment. Furthermore, it demonstrates good application potential in many fields such as energy production, wastewater treatment, and bioremediation. Taking the two model genera (Shewanella and Geobacter) of electroactive microorganisms as examples, this paper introduces the intracellular-to- extracellular electron transfer pathways of electroactive microorganisms, expounds the important role of cytochrome c in extracellular electron transfer, summarizes the analytical methods of cytochrome c-mediated electron transfer, and finally puts forward the future research direction of microbial extracellular electron transfer.