Synthetic, Context-Dependent Microbial Consortium of Predator and Prey

Feng Liu, Junwen Mao, Ting Lu, Qiang Hua

Research output: Contribution to journalArticle

Abstract

Synthetic microbial consortia are a rapidly growing area of synthetic biology. So far, most consortia are designed without considering their environments; however, in nature, microbial interactions are constantly modulated by cellular contexts, which, in principle, can dramatically alter community behaviors. Here we present the construction, validation, and characterization of an engineered bacterial predator-prey consortium that involves a chloramphenicol (CM)-mediated, context-dependent cellular interaction. We show that varying the CM level in the environment can induce success in the ecosystem with distinct patterns from predator dominance to prey-predator crossover to ecosystem collapse. A mathematical model successfully captures the essential dynamics of the experimentally observed patterns. We also illustrate that such a dependence enriches community dynamics under different initial conditions and further test the resistance of the consortium to invasion with engineered bacterial strains. This work exemplifies the role of the context dependence of microbial interactions in modulating ecosystem dynamics, underscoring the importance of including contexts into the design of engineered ecosystems for synthetic biology applications.

Original languageEnglish (US)
Pages (from-to)1713-1722
Number of pages10
JournalACS synthetic biology
Volume8
Issue number8
DOIs
StatePublished - Aug 16 2019

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Keywords

  • context dependence
  • ecosystem dynamics
  • microbial consortia
  • microbial interactions
  • predator-prey
  • synthetic biology

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)

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