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Related Concept Videos

Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
Anoxygenic Photosynthesis01:30

Anoxygenic Photosynthesis

Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green sulfur bacteria, heliobacteria, and...
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...

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Light-Controlled Fermentations for Microbial Chemical and Protein Production
08:37

Light-Controlled Fermentations for Microbial Chemical and Protein Production

Published on: March 22, 2022

Light-energy conversion in engineered microorganisms.

Ethan T Johnson1, Claudia Schmidt-Dannert

  • 1Department of Biochemistry, Molecular Biology and Biophysics, 1479 Gortner Avenue, 140 Gortner Laboratory, University of Minnesota, St. Paul, MN 55108, USA.

Trends in Biotechnology
|October 28, 2008
PubMed
Summary
This summary is machine-generated.

Researchers are engineering microbes to use light energy for producing chemicals. This synthetic biology approach enhances metabolic pathways in non-photosynthetic organisms like E. coli for sustainable chemical production.

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Area of Science:

  • Biotechnology and Synthetic Biology
  • Renewable Energy and Chemical Production

Background:

  • Growing demand for sustainable chemical feedstocks and fuels drives innovation in renewable resource utilization.
  • Advances in molecular biology and metabolic engineering enable enhanced biomass and biohydrogen production.
  • Synthetic biology allows for the design and engineering of complex microbial metabolic networks.

Purpose of the Study:

  • To explore the integration of light-driven processes into nonphotosynthetic microbes.
  • To enhance metabolic capacity for producing industrial and fine chemicals.
  • To improve the efficiency of biosynthetic pathways using engineered light-driven systems.

Main Methods:

  • Investigating the introduction of light-driven proton pumping into microorganisms.
  • Exploring the implementation of anoxygenic photosynthesis in engineered microbes.
  • Utilizing synthetic biology tools to modify metabolic and regulatory networks in Escherichia coli.

Main Results:

  • Demonstrated potential for light-driven processes to boost metabolic capacity in nonphotosynthetic microbes.
  • Progress in engineering Escherichia coli for light-driven chemical biosynthesis.
  • Highlighting advancements in increasing the efficiency of engineered biosynthetic pathways.

Conclusions:

  • Light-driven processes offer a promising strategy to enhance microbial production of chemicals.
  • Engineering nonphotosynthetic microbes with light-harvesting capabilities can lead to more efficient bioproduction.
  • Synthetic biology provides a powerful platform for developing sustainable biotechnologies for the chemical industry.