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Related Experiment Video

Updated: Feb 14, 2026

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Photo-switchable microbial fuel-cells.

Orr Schlesinger1, Rambabu Dandela2, Ashok Bhagat1

  • 1Department of Life Sciences and the Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.

Biotechnology and Bioengineering
|February 8, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a light-controlled enzyme for smart bioelectronic devices. This photo-switchable alcohol dehydrogenase offers efficient, reversible control of enzymatic activity in microbial fuel cells, enhancing power generation.

Keywords:
alcohol dehydrogenasebiorthogonal conjugationclick reactionenzyme based fuel cellsgenetic code expansionmicrobial fuel cells

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Area of Science:

  • Bioengineering
  • Biochemistry
  • Renewable Energy

Background:

  • Efficient regulation of biological systems is crucial for developing smart bio-interfaces and bioelectronic devices.
  • Light offers non-invasive spatial and temporal control over protein activity, surpassing chemical and physical methods.
  • Controlling enzyme activity in biofuel cells can significantly improve energy efficiency and resource management.

Purpose of the Study:

  • To engineer a photo-switchable alcohol dehydrogenase for reversible activity control.
  • To integrate this modified enzyme into a microbial fuel cell (MFC) for enhanced performance.
  • To demonstrate light-based regulation of enzymatic activity and MFC power output.

Main Methods:

  • Modification of alcohol dehydrogenase near the active site using non-canonical amino acids and a photo-reactive molecule.
  • Biochemical and electrochemical assays to evaluate enzyme activity and light-induced reversible behavior.
  • Fabrication and testing of a microbial fuel cell utilizing the modified enzyme.

Main Results:

  • The modified alcohol dehydrogenase exhibited reversible activity control upon irradiation with UV and visible light.
  • The enzyme's behavior was confirmed in both biochemical and electrochemical assessments.
  • A nearly five-fold change in power output was observed in the MFC between the enzyme's inactive and active states.

Conclusions:

  • Photo-switchable enzymes can be effectively engineered for precise biological system regulation.
  • This approach enables the development of smart, light-controlled biofuel cells with tunable power generation.
  • The study highlights the potential of light-activated bioelectronic devices for efficient energy conversion.