Context-dependent redesign of robust synthetic gene circuits

Area of Science:

• Synthetic Biology
• Molecular Biology
• Systems Biology

Background:

• Cells are dynamic platforms for executing synthetic biology circuits, but performance is context-dependent.
• Understanding circuit-host interactions is crucial for advancing synthetic bioengineering.
• Emerging interactions like growth feedback and resource competition significantly impact circuit behavior.

Purpose of the Study:

• To provide an overview of circuit-host interactions in synthetic biology.
• To highlight the impact of these interactions on circuit performance (deterministic and stochastic).
• To emphasize control strategies for mitigating unwanted effects in host-aware and resource-aware synthetic gene circuit design.

Main Methods:

• Literature review of recent advances in synthetic gene circuit design.
• Analysis of circuit-host interactions, including growth feedback and resource competition.
• Discussion of control strategies for mitigating interaction effects.

Main Results:

• Circuit-host interactions introduce context-dependency affecting synthetic gene circuit performance.
• Growth feedback and resource competition are key factors influencing both deterministic and stochastic circuit behaviors.
• Various control strategies can mitigate the undesired effects of circuit-host interactions.

Conclusions:

• Host-aware and resource-aware design principles are essential for robust synthetic gene circuits.
• Mitigating circuit-host interactions improves the predictability and reliability of synthetic biology applications.
• This review summarizes the current state and future directions in designing synthetic gene circuits with host considerations.