Disassembly-driven turn-on fluorescent nanoprobes for selective protein detection

Area of Science:

• Biochemistry
• Molecular Imaging
• Supramolecular Chemistry

Background:

• "Switchable" fluorescent probes offer selective protein detection but design strategies are limited.
• Current methods often lack specificity, leading to challenges in accurate protein imaging and diagnostics.

Purpose of the Study:

• To introduce a novel mechanism for creating protein-specific "turn-on" fluorescent probes.
• To demonstrate a new supramolecular approach for enhanced probe design and function.

Main Methods:

• Utilized amphiphilic, self-assembling compounds comprising a fluorophore and a protein ligand.
• Exploited recognition-induced disassembly of probe aggregates upon target protein binding.
• Developed probes for detecting carbonic anhydrase, avidin, and trypsin.

Main Results:

• Probes exhibited minimal fluorescence in aqueous solution due to self-assembled aggregate quenching.
• Target protein recognition triggered probe disassembly, leading to bright, "turn-on" fluorescence emission.
• Successfully demonstrated selective detection of three distinct proteins.

Conclusions:

• The developed supramolecular strategy provides a new mechanism for "switchable" fluorescent probe generation.
• This approach facilitates the creation of protein-specific probes for applications in diagnosis and molecular imaging.
• The study opens avenues for developing advanced smart probes for diverse biological targets.