Engineering Customized Cell Sensing and Response Behaviors Using Synthetic Notch Receptors

Area of Science:

• Cell Biology
• Synthetic Biology
• Molecular Engineering

Background:

• Notch proteins are transmembrane receptors crucial for cell-cell communication, mediating signaling through intramembrane proteolysis.
• The Notch pathway involves ligand binding, receptor cleavage, and release of an intracellular domain to regulate gene expression.

Purpose of the Study:

• To engineer novel cell-cell contact signaling pathways using a synthetic Notch (synNotch) platform.
• To demonstrate the ability of synNotch pathways to drive user-defined functional responses in mammalian cells.
• To explore the potential for combinatorial signaling and complex cellular behaviors using orthogonal synNotch receptors.

Main Methods:

• Construction of chimeric synNotch receptors by replacing extracellular and intracellular domains of native Notch.
• Testing synNotch pathway functionality in diverse mammalian cell types.
• Utilizing orthogonal synNotch receptors for combinatorial signaling and integrated cellular responses.

Main Results:

• Chimeric synNotch receptors successfully generated novel cell-cell contact signaling pathways.
• SynNotch pathways demonstrated the capacity to induce specific, user-defined cellular functions.
• Individual synNotch pathways were functionally orthogonal, allowing for independent operation.
• Combinatorial use of synNotch receptors enabled complex behaviors like Boolean logic and multicellular cascades.

Conclusions:

• Synthetic Notch receptors offer a versatile platform for engineering customized cell sensing and response behaviors.
• SynNotch technology provides flexibility in designing novel signaling pathways responsive to specific extracellular cues.
• This approach allows for precise control over cellular functions and the creation of sophisticated multicellular systems.