A chemically modified green-fluorescent protein that responds to cleavage of an engineered disulphide bond by Fluorescence Resonance Energy Transfer (FRET)-based changes

Wei Zhang, Miho Suzuki, Yoichiro Ito, Kenneth T. Douglas

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The mixed disulfide of a Green-Fluorescent Protein with an Alexa 532 fluorescent label showed FRET, with quenching of the GFP emission. Reductive cleavage of this disulfide bond destroyed the FRET, giving a change in the ratios of fluorescence intensity at the wavelengths corresponding to the GFP and the Alexa dye. Cleavage by glutathione (second order rate constant at pH 7.4 was 1.18 ± 0.02 × 10 2 Min -1 min -1) was faster than for sodium cyanoborohydride. Copyright © 2005 The Chemical Society of Japan.
    Original languageEnglish
    Pages (from-to)766-767
    Number of pages1
    JournalChemistry Letters
    Volume34
    Issue number6
    DOIs
    Publication statusPublished - 5 Jun 2005

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