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Model acetogens as chassis for CO2-driven bioproduction.

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  • 1Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland, Australia; Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia.

Current Opinion in Biotechnology
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Acetogens fix carbon dioxide (CO2) using the efficient Wood-Ljungdahl pathway, enabling sustainable bioproduction. Overcoming CO2-only conversion challenges is key for low-carbon manufacturing.

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Area of Science:

  • Microbiology
  • Biotechnology
  • Biochemistry

Background:

  • Microbes are crucial for the carbon cycle, regulating greenhouse gas fluxes.
  • Acetogens utilize the Wood-Ljungdahl pathway for energy-efficient CO2 fixation.
  • Acetogens are promising for sustainable bioproduction via gas fermentation.

Purpose of the Study:

  • To review the role of acetogens in anaerobic CO2 conversion.
  • To highlight metabolic capabilities and strain development in acetogens.
  • To explore bioprocess strategies for low-carbon biomanufacturing.

Main Methods:

  • Review of existing literature on acetogen metabolism and bioprocessing.
  • Analysis of metabolic engineering and synthetic biology advancements.
  • Discussion of challenges and solutions for CO2-only bioconversion.

Main Results:

  • Acetogens efficiently fix CO2 via the Wood-Ljungdahl pathway, producing valuable products.
  • Metabolic engineering has expanded acetogen production capabilities.
  • CO2-only bioconversion presents energetic challenges compared to syngas fermentation.

Conclusions:

  • Acetogens are key players in anaerobic CO2 conversion and low-carbon biomanufacturing.
  • Strain development and bioprocess optimization are crucial for advancing CO2-based production.
  • Integration with renewable energy sources is needed for efficient CO2 bioconversion.