Protein reconstitution methods for visualizing biomolecular function in living cells.

Area of Science:

• Cellular biology
• Molecular imaging
• Medicinal chemistry

Background:

• Understanding cellular molecule interactions is crucial in biology and medicinal chemistry.
• Genetically-encoded reporters like firefly luciferase, renilla luciferase, and green fluorescent protein (GFP) are widely used for molecular visualization.
• Existing reporters have limitations in visualizing complex cellular dynamics and interactions.

Purpose of the Study:

• To describe novel designs of split green fluorescent protein (GFP) and split luciferase reporters.
• To highlight the principle of reporter fragment reconstitution upon proximity.
• To showcase the applications of these split reporters in various biological imaging contexts.

Main Methods:

• Utilizing split reporter fragments that reconstitute to form a functional reporter when brought into close proximity.
• Applying split GFP and split luciferase systems for screening and imaging.
• Developing methods for visualizing molecular dynamics and activities in living systems.

Main Results:

• Demonstrated the successful design and application of split GFP and split luciferase.
• Showcased the utility of reconstitution methods for screening organelle-localized proteins.
• Validated the use of these reporters for imaging nuclear protein and mRNA dynamics.
• Extended applications to visualizing protease activities in living animals.

Conclusions:

• Split reporter systems offer a versatile platform for molecular imaging in living cells and animals.
• These methods provide powerful tools for studying complex cellular processes and evaluating chemical effects.
• The reconstitution principle enables novel approaches for biological discovery and drug evaluation.