Chain elongators, friends, and foes

Area of Science:

• Biotechnology and microbial ecology

Background:

• Bioproduction of medium chain carboxylic acids (MCCAs) offers a sustainable route for valorizing organic waste.
• Chain elongation, an anaerobic microbial process, is central to MCCA bioproduction, utilizing substrates like ethanol and lactic acid.
• Mixed microbial communities are often employed as biocatalysts in these waste-driven bioproduction systems.

Purpose of the Study:

• To compare isolated chain elongating microorganisms with members found in natural microbiomes.
• To elucidate beneficial and antagonistic interactions within chain elongation microbial communities.
• To identify research gaps for improving the understanding and design of chain elongation bioprocesses.

Main Methods:

• Meta-analysis of publicly available microbial community sequencing data.
• Comparative analysis of isolated chain elongators against microbiome members.
• Identification of microbial interactions and research needs through data synthesis.

Main Results:

• Characterization of the diversity and composition of microbial communities involved in chain elongation.
• Insights into the roles of specific microorganisms and their interactions in the bioprocess.
• Highlighting discrepancies between currently isolated strains and dominant community members.

Conclusions:

• Understanding the complex interplay within chain elongation microbiomes is crucial for process optimization.
• Further research is needed to bridge the gap between isolated strains and functional community members.
• This work provides a foundation for designing and steering microbial communities for efficient bioproduction.