Protease-based synthetic sensing and signal amplification.

Area of Science:

• Synthetic Biology
• Molecular Biology
• Biochemistry

Background:

• Designing protein-based signaling networks is crucial for synthetic biology.
• Current limitations exist in creating tailored signal transducers and receptors for network assembly.

Purpose of the Study:

• To develop a generic method for constructing protein-based molecular switches.
• To engineer signal transducers and receptors for modular signaling networks.

Main Methods:

• Utilized structure-guided design and directed protein evolution.
• Developed artificially autoinhibited proteases as core components.
• Employed modular assembly with affinity clamp peptide receptors.

Main Results:

• Created signal transducers activated by site-specific proteolysis.
• Demonstrated modular receptor design with tunable switch-ON/OFF functions (>5 to >30 fold).
• Engineered integrated signaling circuits with orthogonal protease units for signal propagation and amplification.

Conclusions:

• The developed approach provides a versatile platform for protease-based signaling network construction.
• This method allows for the design of signaling systems with high functional plasticity.
• The engineered networks can potentially interface with any biological process.