Electrochemically active bacteria (EAB) interact electrochemically with electrodes via extracellular electron transfer (EET) pathways. These bacteria have attracted significant attention due to their utility in environmental-friendly bioelectrochemical systems (BESs), including microbial fuel cells and electrofermentation systems. The electrochemical activity of EAB is dependent on their carbon catabolism and respiration; thus, understanding how these processes are regulated will provide insights into the development of a more efficient BES. The process of biofilm formation by EAB on BES electrodes is also important for electric current generation because it facilitates physical and electrochemical interactions between EAB cells and electrodes. This article summarizes the current knowledge on EET-related metabolic and cellular functions of a model EAB, Shewanella oneidensis MR-1, focusing specifically on regulatory systems for carbon catabolism, EET pathways, and biofilm formation. Based on recent developments, the author also discusses potential uses of engineered S. oneidensis strains for various biotechnological applications.

中文翻译：

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调控 Shewanella oneidensis MR-1 分解代谢和电化学活性的分子机制。

电化学活性细菌 (EAB) 通过细胞外电子转移 (EET) 途径与电极发生电化学相互作用。这些细菌因其在环境友好型生物电化学系统 (BES) 中的实用性而备受关注，包括微生物燃料电池和电发酵系统。EAB 的电化学活性取决于它们的碳分解代谢和呼吸作用；因此，了解如何监管这些过程将有助于深入了解更有效的 BES 的开发。EAB 在 BES 电极上形成生物膜的过程对于电流产生也很重要，因为它促进了 EAB 细胞和电极之间的物理和电化学相互作用。本文总结了模型 EAB 的 EET 相关代谢和细胞功能的当前知识，Shewanella oneidensis MR-1，特别关注碳分解代谢、EET 途径和生物膜形成的调节系统。基于最近的发展，作者还讨论了工程化 S. oneidensis 菌株在各种生物技术应用中的潜在用途。