Methanothermobacter thermautotrophicus and Alternative Methanogens: Archaea-Based Production.

Area of Science:

• Microbiology
• Biotechnology
• Biochemistry

Background:

• Methanogenic archaea convert organic matter to methane, crucial for carbon cycling and waste treatment.
• These microbes are vital in power-to-gas technology, converting CO2 and H2 into renewable natural gas.
• Current bioproduction applications are limited to mesophilic species with existing genetic tools.

Purpose of the Study:

• To review genetic engineering advancements for methanogenic archaea, including novel tools for thermophilic species.
• To explore the potential of methanogenic archaea in recombinant bioproduction beyond methane.
• To assess the feasibility of using Methanothermobacter thermautotrophicus for producing novel compounds.

Main Methods:

• Review of existing and novel genetic engineering tools for methanogenic archaea.
• Analysis of recombinant bioproduction strategies in mesophilic and thermophilic microbes.
• Development of a genome-scale metabolic model for Methanothermobacter thermautotrophicus.

Main Results:

• Recent developments in genetic tractability for both mesophilic and thermophilic methanogenic archaea are discussed.
• Potential bioproduction applications using thermophilic methanogenic archaea are identified.
• Estimated conversion efficiencies for putative products from M. thermautotrophicus were calculated using metabolic modeling.

Conclusions:

• Genetic engineering tools are expanding for thermophilic methanogenic archaea, opening new bioproduction avenues.
• Methanothermobacter thermautotrophicus shows promise for producing novel compounds beyond methane.
• Metabolic modeling provides a basis for predicting and optimizing bioproduction efficiencies.