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Solving a shuttle mystery.

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  • 1BioTechnology Institute, University of Minnesota, Minneapolis and Saint Paul, United States.

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|August 9, 2019
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Summary
This summary is machine-generated.

Shewanella oneidensis bacteria utilize an abiotic reaction for extracellular electron transfer. This process is crucial for microbial respiration and biogeochemical cycling.

Keywords:
ACNQShewanella oneidensisabiotic reactionanaerobic bacteriabiochemistrychemical biologyextracellular electron shuttleinfectious diseasemicrobiologynone

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Area of Science:

  • Microbiology
  • Biochemistry
  • Environmental Science

Background:

  • Shewanella oneidensis is a facultative anaerobe known for its extracellular electron transfer (EET) capabilities.
  • Microbial EET is vital for understanding biogeochemical cycles and developing bioelectrochemical systems.

Purpose of the Study:

  • To elucidate the specific abiotic reaction employed by Shewanella oneidensis for electron shuttling.
  • To investigate the mechanisms underlying extracellular electron transfer in this model organism.

Main Methods:

  • Utilized electrochemical techniques to monitor electron transfer.
  • Employed spectroscopic methods to identify reaction intermediates.
  • Conducted genetic analysis to confirm the involvement of specific pathways.

Main Results:

  • Identified a novel abiotic redox reaction facilitating electron export.
  • Demonstrated that this reaction is independent of direct cell-to-cell contact.
  • Quantified the rate of electron transfer mediated by this abiotic process.

Conclusions:

  • Shewanella oneidensis employs a non-biological reaction to efficiently shuttle electrons extracellularly.
  • This finding expands our understanding of microbial respiration and EET mechanisms.
  • The identified abiotic reaction has implications for microbial fuel cells and bioremediation.