Fluorescent labeling of proteins with amine-specific 1,3,2-(2H)-dioxaborine polymethine dye |
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Authors: | Gerasov Andriy Shandura Mykola Kovtun Yuriy Losytskyy Mykhaylo Negrutska Valentyna Dubey Igor |
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Institution: | Institute of Organic Chemistry, National Academy of Sciences, 02660 Kyiv, Ukraine. |
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Abstract: | A novel water-soluble amine-reactive dioxaborine trimethine dye was synthesized in a good yield and characterized. The potential of the dye as a specific reagent for protein labeling was demonstrated with bovine serum albumin and lysozyme. Its interaction with proteins was studied by fluorescence spectroscopy and gel electrophoresis. The covalent binding of this almost nonfluorescent dye to proteins results in a 75- to 78-fold increase of its emission intensity accompanied by a red shift of the fluorescence emission maximum by 27 to 45 nm, with fluorescence wavelengths of labeled biomolecules being more than 600 nm. The dye does not require activation for the labeling reaction and can be used in a variety of bioassay applications. |
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Keywords: | Starch Phosphorylation Glucose 6-phosphate Glucose 3-phosphate Mass spectrometry |
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