Extracellular electron transfer through visible light induced excited-state outer membrane C-type cytochromes of Geobacter sulfurreducens
文献类型：期刊论文
| 作者 | Zhang, Bo; Cheng, Hao-Yi ; Wang, Aijie
|
| 刊名 | BIOELECTROCHEMISTRY
 |
| 出版日期 | 2021-04 |
| 卷号 | 138页码:- |
| 关键词 | Extracellular electron transfer Excited-state Photoelectrochemical Bioelectrochemical systems TiO2 Dissimilatory metal-reducing bacteria |
| ISSN号 | 1567-5394 |
| 英文摘要 | Dissimilatory metal-reducing bacteria (DMRB) have a variety of c-type cytochromes (OM c-cyts) intercalated in their outer membrane, and this structure serves as the physiological basis for DMRB to carry out the extracellular electron transfer processes. Using Geobacter sulfurreducens as a model DMRB, we demonstrated that visible-light illumination could alter the electronic state of OM c-cyts from the ground state to the excited state in vivo. The existence of excited-state OM c-cyts in vivo was confirmed by spectroscopy. More importantly, excited-state OM c-cyts had a more negative potential compared to their ground-state counterparts, conferring DMRB with an extra pathway to transfer electrons to semi conductive electron acceptors. To demonstrate this, using a TiO2-coated electrode as an electron acceptor, we showed that G. sulfurreducens could directly utilise the conduction band of TiO2 as an electron acceptor under visible-light illumination (lambda > 420 nm) without causing TiO2 charge separation. When G. sulfurreducens was subject to visible-light illumination, the rate of extracellular electron transfer (EET) to TiO2 accelerated by over 8-fold compared to that observed under dark conditions. Results of additional electrochemical tests provided complementary evidence to support that G. sulfurreducens utilised excited-state OM c-cyts to enhance EET to TiO2. (C) 2020 Published by Elsevier B.V. |
| WOS研究方向 | Biochemistry & Molecular Biology ; Biology ; Biophysics ; Electrochemistry |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46115]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Bo,Cheng, Hao-Yi,Wang, Aijie. Extracellular electron transfer through visible light induced excited-state outer membrane C-type cytochromes of Geobacter sulfurreducens[J]. BIOELECTROCHEMISTRY,2021,138:-. |
| APA | Zhang, Bo,Cheng, Hao-Yi,&Wang, Aijie.(2021).Extracellular electron transfer through visible light induced excited-state outer membrane C-type cytochromes of Geobacter sulfurreducens.BIOELECTROCHEMISTRY,138,-. |
| MLA | Zhang, Bo,et al."Extracellular electron transfer through visible light induced excited-state outer membrane C-type cytochromes of Geobacter sulfurreducens".BIOELECTROCHEMISTRY 138(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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