Functional predictability of universal gene circuits in diverse microbial hosts

Area of Science:

• Synthetic Biology
• Microbial Engineering
• Genetic Circuit Design

Background:

• Synthetic biology principles traditionally focused on model bacteria.
• Expanding engineered biological systems to non-model microbes is crucial for broader applications.
• Reliable and predictable function of genetic circuits across diverse hosts remains a challenge.

Purpose of the Study:

• To systematically characterize the cross-species universality of key transcriptional regulatory modules.
• To assess the predictability of genetic circuit behavior in non-model organisms.
• To demonstrate the utility of universal biological parts for synthetic bioengineering.

Main Methods:

• Characterization of T7 RNA polymerase activator and repressor modules in three non-model microbes.
• Parametrized model fitting to identify host non-specific parameters.
• Construction and testing of genetic NOT gate and band-pass filter circuits.

Main Results:

• Striking linear relationships observed in module activities across different organisms.
• Identified host non-specific parameters governing module universality.
• Accurate quantitative prediction of genetic circuit behaviors using combined models.

Conclusions:

• Transcriptional regulatory modules exhibit significant cross-species universality.
• Host non-specific parameters facilitate predictive modeling of genetic circuits.
• Universal biological parts and predictive modeling are key for advancing synthetic bioengineering.