Modularized Design and Construction of Tunable Microbial Consortia with Flexible Topologies.

Area of Science:

• Synthetic biology
• Microbial ecology
• Systems biology

Background:

• Bacterial community composition is vital for ecosystem diversity, stability, and function.
• Quantitative and mechanistic understanding of microbial community dynamics remains limited.

Purpose of the Study:

• To develop a modularized design framework for bottom-up construction of synthetic bacterial consortia.
• To enable quantitative prediction and robust control of microbial community dynamics.

Main Methods:

• Engineered synthetic bacterial consortia using genetic circuit modules to create amensalism and competition interactions.
• Validated module and strain functions to quantify dynamic parameters.
• Integrated quantified parameters into a mechanistic model for predicting consortia composition dynamics.

Main Results:

• Accurately predicted bacterial consortia composition dynamics for amensalism and competition without additional fitting.
• Identified experimental conditions for achieving stable coexistence in bacterial communities.
• Demonstrated robust control over complex, fluid bacterial systems.

Conclusions:

• The modular design framework facilitates the construction and study of synthetic bacterial consortia.
• Quantitative understanding enables accurate prediction and robust control of microbial community dynamics.
• This approach advances the engineering of complex microbial ecosystems.