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Related Concept Videos

Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
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Electron Transport Chains01:28

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
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Electron Transport Chain Components01:29

Electron Transport Chain Components

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The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
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Updated: Oct 21, 2025

Characterizing Mediated Extracellular Electron Transfer in Lactic Acid Bacteria with a Three-Electrode, Two-Chamber Bioelectrochemical System
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Engineering Biological Electron Transfer and Redox Pathways for Nanoparticle Synthesis.

James Q Boedicker1,2, Manasi Gangan1, Kyle Naughton1

  • 1Department of Physics and Astronomy, University of Southern California, Los Angeles, California, USA.

Bioelectricity
|September 3, 2021
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Summary

Bacteria possess unique electron transport pathways, enabling them to process heavy metals and synthesize nanoparticles. This review explores bacterial metal reduction and engineered applications in synthetic biology.

Keywords:
bacterial metal reductionextracellular electron transportmicrobiologynanoparticle synthesisnanotechnologysynthetic biology

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Area of Science:

  • Microbiology
  • Biotechnology
  • Synthetic Biology

Background:

  • Bacteria exhibit diverse electron transport mechanisms distinct from eukaryotes.
  • Some bacteria have evolved enzymes to detoxify heavy metals like arsenic, cadmium, and mercury.
  • Bacterial respiration can occur without oxygen, utilizing alternative electron acceptors.

Purpose of the Study:

  • To review bacterial metal reduction pathways.
  • To summarize engineered bacteria for nanoparticle production.
  • To highlight advancements in bacterial electron transport pathway characterization and application.

Main Methods:

  • Characterization of bacterial redox and electron transport pathways.
  • Synthetic biology approaches for engineering bacterial functions.
  • Biologically controlled synthesis of nanoparticles using engineered bacteria.

Main Results:

  • Bacteria can naturally reduce and process various metals and semimetals.
  • Engineered bacteria demonstrate potential for controlled nanoparticle synthesis.
  • Bacterial electron transport pathways offer novel biotechnological applications.

Conclusions:

  • Bacterial electron transport pathways are versatile tools for biotechnology.
  • Engineered bacteria can be utilized for metal detection and nanoparticle production.
  • Further research into bacterial electron transport pathways will unlock new applications.