Volume 63, Issue 51 e202412072
Research Article

Long-Term Autotrophic Growth and Solar-to-Chemical Conversion in Shewanella Oneidensis MR-1 through Light-Driven Electron Transfer

Yan Shi

Yan Shi

School of Metallurgy and Environment, Central South University, Changsha, 410083 China

Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, 410083 China

These authors contributed equally to this work.

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Kejing Zhang

Kejing Zhang

School of Metallurgy and Environment, Central South University, Changsha, 410083 China

These authors contributed equally to this work.

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Jianxin Chen

Jianxin Chen

School of Metallurgy and Environment, Central South University, Changsha, 410083 China

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Bingtian Zhang

Bingtian Zhang

School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055 China

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Xun Guan

Xun Guan

Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095 USA

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Xin Wang

Xin Wang

Department of Microbiology and Cell Science, University of Florida, Gainesville, FL

Department of Microbiology, Miami University, Oxford, OH 45056 USA

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Tong Zhang

Tong Zhang

College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350 China

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Han Song

Han Song

School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong, 510006 China

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Long Zou

Long Zou

School of Metallurgy and Environment, Central South University, Changsha, 410083 China

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Xiangfeng Duan

Xiangfeng Duan

Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095 USA

California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095 USA

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Haichun Gao

Haichun Gao

Institute of Microbiology and College of Life Sciences, Zhejiang University, Zhejiang, Hangzhou, 310058 China

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Zhang Lin

Corresponding Author

Zhang Lin

School of Metallurgy and Environment, Central South University, Changsha, 410083 China

Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, 410083 China

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First published: 28 August 2024
Citations: 8

Graphical Abstract

Shewanella oneidensis MR-1 achieved months-long autotrophic growth and acetate production through CO2 fixation coupled to sulfur oxidation, driven by biogenic CdS nanoparticles under light.

Abstract

Members of the genus Shewanella are known for their versatile electron accepting routes, which allow them to couple decomposition of organic matter to reduction of various terminal electron acceptors for heterotrophic growth in diverse environments. Here, we report autotrophic growth of Shewanella oneidensis MR-1 with photoelectrons provided by illuminated biogenic CdS nanoparticles. This hybrid system enables photosynthetic oscillatory acetate production from CO2 for over five months, far exceeding other inorganic-biological hybrid system that can only sustain for hours or days. Biochemical, electrochemical and transcriptomic analyses reveal that the efficient electron uptake of S. oneidensis MR-1 from illuminated CdS nanoparticles supplies sufficient energy to stimulate the previously overlooked reductive glycine pathway for CO2 fixation. The continuous solar-to-chemical conversion is achieved by photon induced electric recycling in sulfur species. Overall, our findings demonstrate that this mineral-assisted photosynthesis, as a widely existing and unique model of light energy conversion, could support the sustained photoautotrophic growth of non-photosynthetic microorganisms in nutrient-lean environments and mediate the reversal of coupled carbon and sulfur cycling, consequently resulting in previously unknown environmental effects. In addition, the hybrid system provides a sustainable and flexible platform to develop a variety of solar products for carbon neutrality.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.