Labeling of proteins by BODIPY-quinone methides utilizing anti-Kasha photochemistry




Zlatić, Katarina
Antol, Ivana
Uzelac, Lidija
Dražić, Ana-Matea M.
Kralj, Marijeta
Bohne, Cornelia
Basarić, Nikola

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ACS Applied Materials & Interfaces


A novel approach for the photolabeling of proteins by a BODIPY fluorophore is reported that is based on an anti-Kasha photochemical reaction from an upper singlet excited state (Sn) leading to the deamination of the BODIPY quinone methide precursor. On the other hand, the high photochemical stability of the dye upon excitation by visible light to S1 allows for the selective fluorescence detection from the dye or dye-protein adduct, without concomitant bleaching or hydrolysis of the protein-dye adduct. Therefore, photolabeling and fluorescence monitoring can be uncoupled by using different excitation wavelengths. Combined theoretical and experimental studies by preparative irradiations, fluorescence and laser flash photolysis fully disclose the photophysical properties of the dye and its anti-Kasha photochemical reactivity. The application of the dye was demonstrated on photolabeling of bovine serum albumin.



BODIPY, Fluorescence, Proteins, Photochemistry, Quinone methide


Zlatić, K., Antol, I., Uzelac, L., Dražić. A. M., Kralj, M., Bohne, C., & Basarić, N. (2020). Labeling of proteins by BODIPY-quinone methides utilizing anti-Kasha photochemistry. ACS Applied Materials & Interfaces, 12(1), 347-351.