JOURNAL ARTICLE

Synthesis and application of quantum dots FRET-based protease sensors

Lifang Shi, Vania De Paoli, Nitsa Rosenzweig, Zeev Rosenzweig
Journal of the American Chemical Society 2006 August 16, 128 (32): 10378-9
16895398
Preparation of FRET-based quantum dots as protease sensors-RGDC peptide molecules are bound to the surface of CdSe/ZnS quantum dots. The peptide molecules are then labeled with rhodamine dye molecules. The emission color of the quantum dots change from green to orange due to fluorescence resonance energy transfer (FRET) between the quantum dots and the bound rhodamine molecules. Cleavage of the peptide by selective proteases releases the rhodamine molecules from the quantum dots surface, which results in decreasing FRET efficiency between the quantum dots and the rhodamine molecules. The emission color of the quantum dots changes back to green.

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