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Related Concept Videos

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Microbes and Other Elemental Cycles

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Related Experiment Video

Updated: Jul 12, 2026

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
09:00

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

Metal reduction kinetics in Shewanella.

Raman Lall1, Julie Mitchell

  • 1BACTER Institute, University of Wisconsin-Madison, Wisconsin 53706, USA. rl8q@cms.mail.virginia.edu

Bioinformatics (Oxford, England)
|August 28, 2007
PubMed
Summary

A new power law model accurately estimates metal reduction kinetics in bacteria like Shewanella oneidensis MR-1. This model improves predictions for single and mixed metal reduction, outperforming traditional Michaelis-Menten approaches.

Area of Science:

  • Microbiology
  • Biogeochemistry
  • Computational Biology

Background:

  • Dissimilatory metal-reducing bacteria, such as Shewanella oneidensis MR-1, are crucial in metal reduction processes.
  • Traditional Michaelis-Menten models often fail to accurately represent in vivo metal reduction kinetics.
  • Accurate parameter estimation from time-series data is essential for understanding microbial metal transformations.

Purpose of the Study:

  • To develop and validate a novel power law-based model for metal reduction kinetics.
  • To improve the accuracy of parameter estimation for microbial metal reduction.
  • To predict metal and mixed metal reduction rates in bacterial cultures.

Main Methods:

  • A power law model was developed to describe metal reduction kinetics.

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Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site
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Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
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Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

In Situ Characterization of Shewanella oneidensis MR1 Biofilms by SALVI and ToF-SIMS
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In Situ Characterization of Shewanella oneidensis MR1 Biofilms by SALVI and ToF-SIMS

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Published on: July 24, 2018

  • The model was applied to time-series data from Shewanella oneidensis MR-1.
  • Parameter estimation for single and mixed metal systems (including Uranyl reduction by S. alga BR-Y) used a generalized least squares formulation in Matlab with Levenberg-Marquardt optimization.

    • Main Results:

    • The power law model provided reasonable parameter estimates for metal reduction kinetics.
    • The model successfully captured experimental data for S. oneidensis MR-1.
    • Simulations using estimated parameters accurately predicted reduction rates for both single and mixed metals, including Uranyl and iron hydrous oxides.

    Conclusions:

    • The proposed power law model offers a robust approach for analyzing metal reduction kinetics in microbial systems.
    • This model enhances the prediction of metal reduction dynamics, outperforming conventional methods.
    • The findings have implications for understanding biogeochemical cycling and microbial remediation strategies.