Molecular spies for bioimaging--fluorescent protein-based probes

Area of Science:

• Biotechnology
• Molecular Biology
• Optical Imaging

Background:

• Advances in optical imaging and genetic engineering have driven innovation in biological visualization.
• Genetically encoded indicators, particularly fluorescent proteins (FPs), are crucial for observing cellular processes.

Purpose of the Study:

• To review current unimolecular indicators for biological visualization.
• To highlight the development and application of genetically encoded indicators for cellular imaging.

Main Methods:

• Review of unimolecular indicators based on protein conformational changes.
• Discussion of approaches including fluorescence resonance energy transfer (FRET) and single-FP methods.

Main Results:

• Identification of a range of unimolecular indicators for imaging ions, molecules, and enzymatic activities.
• Demonstration of indicators' ability to report on specific intracellular activities within targeted cellular compartments.

Conclusions:

• Unimolecular indicators offer powerful tools for "spying on cells" with high specificity.
• Continued development of FP-based indicators enhances capabilities in cellular and subcellular imaging.