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Genome Reduction Improves Recombinant Benzoxazole Production in Myxococcus xanthus
Dustin Joshua Vollmann1, Lucia Lernoud1, Markus Nett1
1Department of Biochemical and Chemical Engineering, TU Dortmund University, Dortmund 44227, Germany.
ACS Synthetic Biology
|April 21, 2025
Summary
Genome reduction in Myxococcus xanthus improves biotechnological production by removing dispensable gene clusters. However, some gene cluster combinations cannot be deleted without harming the bacteria.
Area of Science:
- Synthetic biology
- Microbial biotechnology
- Evolutionary genomics
Background:
- Genome reduction is a key evolutionary process.
- Synthetic biology utilizes genome reduction to engineer cellular functions.
- Myxococcus xanthus, a social bacterium, possesses a large genome with numerous secondary metabolite biosynthetic gene clusters (BGCs).
Purpose of the Study:
- To investigate the impact of genome reduction on the biotechnological performance of Myxococcus xanthus.
- To assess the feasibility of deleting BGCs to enhance the production of recombinant natural products.
- To identify potential limitations or sensitivities associated with extensive genome reduction in M. xanthus.
Main Methods:
- Systematic deletion of multiple biosynthetic gene clusters (BGCs) from the Myxococcus xanthus genome.
- Evaluation of the effect of BGC removal on the production of a target recombinant natural product.
- Analysis of bacterial viability and performance following combined BGC deletions.
Main Results:
- Consecutive removal of BGCs significantly increased the titer of a recombinantly produced natural product.
- Certain combinations of BGC deletions were not tolerated by M. xanthus, leading to non-viable strains.
- Individual deletion of these BGCs was possible, indicating specific sensitivities to combined genomic alterations.
Conclusions:
- Genome reduction by targeted BGC deletion is a viable strategy to enhance microbial production in M. xanthus.
- The deletion of BGCs can redirect metabolic resources towards desired products.
- M. xanthus exhibits specific genetic sensitivities, requiring careful consideration of deletion strategies to avoid inviability.
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