Synthetic Bistability and Differentiation in Yeast.

Area of Science:

• Synthetic biology
• Cellular engineering
• Microbial systems

Background:

• Engineered systems controlling cellular differentiation are crucial for tissue engineering and synthetic biology.
• Multicellular systems engineering has utilized synthetic circuits with multiple states.
• Directing cellular behavior using these states remains a significant challenge.

Purpose of the Study:

• To present a novel cellular differentiation program in yeast (Saccharomyces cerevisiae).
• To develop a synthetic bistable switch coupled to an antibiotic resistance gene affecting yeast growth.
• To create a growth-differentiation circuit for controlled cellular behavior.

Main Methods:

• Construction of a synthetic bistable switch utilizing a positive feedback loop with a novel transcription factor.
• Implementation of transient inducer inputs for switching the circuit ON and OFF.
• Coupling the bistable switch with an antibiotic resistance gene to influence cell growth.

Main Results:

• A novel synthetic bistable switch was designed and experimentally validated in yeast.
• The circuit enables switching between stable HIGH and LOW growth rate states.
• Transient inducer inputs successfully controlled the cellular differentiation program.

Conclusions:

• Demonstrated a rationally designed and experimentally validated cellular differentiation behavior in yeast.
• The developed growth-differentiation circuit offers a new tool for engineering multicellular systems.
• This work advances the control of cellular states for synthetic biology applications.