Electro-polarization of protein-like substances accelerates trans-cell-wall electron transfer in microbial extracellular respiration

Yu, Qilin; Mao, Haohao; Yang, Bowen; Zhu, Yahui; Sun, Changsen; Zhao, Zhiqiang; Li, Yang; Zhang, Yaobin

doi:10.1016/j.isci.2023.106065

Cited by 10 publications

(2 citation statements)

References 46 publications

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“…52 As polarization intensity was proportional to the relative dielectric constant, the FeS NPs rendered S. oneidensis with more substantial electron storage capacity to participate in extracellular respiration. 53,54 This corroborated the previous remarks that the S. oneidensis@FeS system had a greater capacitance. 55 As demonstrated in our previous work, c-Cyts, as a typical electroactive protein, played an electron transfer role in reversing EET.…”

Section: ■ Results and Discussionsupporting

confidence: 90%

Biological Self-Assembled Transmembrane Electron Conduits for High-Efficiency Ammonia Production in Microbial Electrosynthesis

Li,

Qiao,

Guo

et al. 2024

Environ. Sci. Technol.

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Usually, CymA is irreplaceable as the electron transport hub in Shewanella oneidensis MR-1 bidirectional electron transfer. In this work, biologically self-assembled FeS nanoparticles construct an artificial electron transfer route and implement electron transfer from extracellular into periplasmic space without CymA involvement, which present similar properties to type IV pili. Bacteria are wired up into a network, and more electron transfer conduits are activated by self-assembled transmembrane FeS nanoparticles (electron conduits), thereby substantially enhancing the ammonia production. In this study, we achieved an average NH 4 + -N production rate of 391.8 μg•h −1 •L reactor −1 with the selectivity of 98.0% and cathode efficiency of 65.4%. Additionally, the amide group in the protein-like substances located in the outer membrane was first found to be able to transfer electrons from extracellular into intracellular with c-type cytochromes. Our work provides a new viewpoint that contributes to a better understanding of the interconnections between semiconductor materials and bacteria and inspires the exploration of new electron transfer chain components.

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Section: ■ Results and Discussionsupporting

confidence: 90%

Biological Self-Assembled Transmembrane Electron Conduits for High-Efficiency Ammonia Production in Microbial Electrosynthesis

Li,

Qiao,

Guo

et al. 2024

Environ. Sci. Technol.

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show abstract

“…In recent reports on the anode modification and anodic microbial community, PEM was compressed on the cathode to improve the electron transfer efficiency . The metabolic mechanism of anode microorganisms involves extracellular anaerobic respiration, where electrons were generated by the degradation of organic matter inside the cell and transported to the extracellular anode. , The electrons were then transferred to the cathode through external circuits and bound to the terminal electron receptor. PEM serves as a barrier for ion conductivity in MFC electrolytes, thereby improving proton transfer efficiency .…”

Section: Electron Transfer Mechanisms In Mfcsmentioning

confidence: 99%

Carbonaceous Anodes and Compatible Exoelectrogens in High-Performance Microbial Fuel Cells: A Review

Cheng,

Zhang,

et al. 2024

ACS EST Eng.

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Microbial fuel cells (MFCs) are next-generation electrical devices that harness biochemical resources to simultaneously generate renewable energy and remediate environmental wastewater. To engineer high-performance MFCs, much attention has been paid to anode materials since anodes are pivotal platforms for electroactive microbial (exoelectrogens) adhesion and electron transfer, thereby dominating the overall power output and substrate degradation efficiency. Driven by emerging lowcost and high-performance MFC anodes fabricated from conventional carbon materials and biomass sources, this Review summarizes recent advances in carbonaceous anodes and their compatible exoelectrogens. The fundamental properties of highperformance anodes, including porosity, biocompatibility, and electric conductivity, are compared in detail to associate the exoelectrogen metabolism with device power output and substrate degradation efficiency. This Review may build up a new interface between abio-and biocomponents to accelerate the journey toward cost-effective, high-efficiency, and large-scale MFCs based on carbonaceous materials.

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Electron transfer regulation-based biotechnology for emerging contaminants treatment

Shi,

Wu,

et al. 2024

Water Security: Big Data-Driven Risk Identification, Assessment and Control of Emerging Contaminants

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Electro-polarization of protein-like substances accelerates trans-cell-wall electron transfer in microbial extracellular respiration

Cited by 10 publications

References 46 publications

Biological Self-Assembled Transmembrane Electron Conduits for High-Efficiency Ammonia Production in Microbial Electrosynthesis

Biological Self-Assembled Transmembrane Electron Conduits for High-Efficiency Ammonia Production in Microbial Electrosynthesis

Carbonaceous Anodes and Compatible Exoelectrogens in High-Performance Microbial Fuel Cells: A Review

Electron transfer regulation-based biotechnology for emerging contaminants treatment

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