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Reprogramming microbial populations using a programmed lysis system to improve chemical production.

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A new programmed lysis system (PLS) enhances microbial cooperation for chemical production. This engineered system successfully increased poly(lactate-co-3-hydroxybutyrate) and butyrate yields in microbial cell factories.

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Area of Science:

  • Synthetic Biology
  • Metabolic Engineering
  • Microbial Biotechnology

Background:

  • Microbial populations offer a model for cooperation in chemical production.
  • Regulating microbial population structure for enhanced output is challenging.

Purpose of the Study:

  • To develop a programmed lysis system (PLS) for reprogramming microbial cooperation.
  • To enhance chemical production through improved metabolic division of labor.

Main Methods:

  • Constructed a colicin M-based lysis unit to lyse Escherichia coli.
  • Designed a protease-based switch to control lysis timing.
  • Integrated lysis unit and switch into a PLS for chemical production.

Main Results:

  • Switched poly(lactate-co-3-hydroxybutyrate) production from synthesis to release, increasing free PLH by 283%.
  • Shifted butyrate production in E. coli consortia, achieving 41.61 g/L.
  • Demonstrated enhanced metabolic division of labor in engineered microbial populations.

Conclusions:

  • The developed PLS effectively reprograms microbial cooperation for increased chemical yields.
  • Engineered microbial populations show significant potential for improving cell factory efficiency.
  • This approach is applicable to diverse chemical production processes using microbial consortia.