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Related Experiment Video

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Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology

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Published on: December 15, 2017

Maximizing reductant flow into microbial H2 production.

Wayne S Kontur¹, Daniel R Noguera, Timothy J Donohue

¹Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, United States; DOE Great Lakes Bioenergy Research Center, Madison, WI, United States.

Current Opinion in Biotechnology

|November 1, 2011

Summary

Maximizing microbial hydrogen gas (H2) production involves directing cellular energy flow to H2-producing enzymes. New methods explore tethering electron donors and acceptors to enhance H2 generation in various organisms.

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Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions

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Published on: August 15, 2019

Area of Science:

Microbiology
Biotechnology
Bioenergy

Background:

Sustainable hydrogen gas (H2) production using microbes requires optimizing intracellular reductant flow.
Current strategies for H2 enhancement include metabolic engineering in dark fermentative bacteria and pathway redirection in photofermentative bacteria.

Purpose of the Study:

To explore novel methods for maximizing microbial H2 production by enhancing reductant flow.
To investigate the potential of creating new electron transfer pathways for increased H2 yield.

Main Methods:

Reviewing strategies for increasing H2 production in dark and photofermentative bacteria.
Examining the concept of tethering electron donors and acceptors (e.g., hydrogenase, photosystem I) in oxygenic phototrophs.

Main Results:

Metabolic engineering and exogenous hydrogenase expression can boost H2 in dark fermentative bacteria.
Minimizing competing pathways enhances H2 production in photofermentative bacteria.
Tethering electron donors and acceptors offers a new approach for directing reductant flow.

Conclusions:

Optimizing intracellular reductant flow is crucial for microbial H2 production.
Tethering electron donors and acceptors presents a promising strategy applicable across different microbial systems for enhanced H2 generation.