Design and implementation of a biomolecular concentration tracker

Area of Science:

• Synthetic biology
• Molecular engineering
• Systems biology

Background:

• Synthetic biology aims to engineer complex artificial systems within living cells.
• Closed-loop active feedback systems provide dynamic and adaptive control, maintaining constant activity despite cellular noise.
• Protein scaffolds offer a modular approach for building biological circuits.

Purpose of the Study:

• To engineer a synthetic protein scaffold-based circuit for dynamic concentration tracking.
• To implement negative feedback for robust biomolecular concentration monitoring.
• To demonstrate tunability of steady-state outputs in engineered biological systems.

Main Methods:

• Utilized synthetic protein scaffolds as a modular mechanism for negative feedback control.
• Designed a circuit where input triggers scaffold production, leading to colocalization and antiscaffold protein expression.
• Employed a combination of computational modeling and experimental validation in Escherichia coli.

Main Results:

• Demonstrated successful dynamic protein concentration tracking in Escherichia coli.
• Showcased the ability of the biomolecular concentration tracker circuit to respond to changing inputs.
• Confirmed that the steady-state outputs of the circuit can be effectively tuned.

Conclusions:

• The developed synthetic protein scaffold system enables robust biomolecular concentration tracking.
• The circuit provides a tunable platform for controlling protein levels in engineered cells.
• This work contributes to the advancement of dynamic control strategies in synthetic biology.