title: Fluorescence anisotropy assay for the traceless kinetic analysis of protein digestion.
abstract: A novel fluorescence polarization assay based on the natural fluorophore epicocconone has been developed. This assay allows the rapid and accurate determination of enzyme kinetic parameters as well as inhibition constants through the measurement of fluorescence anisotropy on the actual substrate of the protease. It takes advantage of epicocconone's ability to reversibly react with proteins to form an internal charge-transfer complex that is highly fluorescent. The protein-substrate is labeled in situ without the need for prior incubation and/or derivatization steps, which saves time and effort compared to methods employing specifically labeled protein-substrates. The assay can be carried out in 96- or 384-well plates, making it suitable for high-throughput applications in drug development and biotechnology.
authors.affiliation: Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW, 2109, Australia.
authors.forename: Felix
authors.initials: F
authors.lastname: Cleemann
authors.forename: Peter
authors.initials: P
authors.lastname: Karuso
mesh_terms: D001578:Benzopyrans / Q000737:chemistry; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology; D005454:Fluorescence Polarization / Q000379:methods*; D005663:Furans / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D020128:Inhibitory Concentration 50; D007659:Ketones / Q000737:chemistry; D007700:Kinetics; D010206:Papain / Q000037:antagonists & inhibitors / Q000737:chemistry; D010447:Peptide Hydrolases / Q000737:chemistry* / Q000378:metabolism*; D013194:Staining and Labeling; D014107:Tosyllysine Chloromethyl Ketone / Q000737:chemistry / Q000494:pharmacology
chemical_list: D001578:Benzopyrans; D004791:Enzyme Inhibitors; D005663:Furans; D007659:Ketones; D014107:Tosyllysine Chloromethyl Ketone; C477464:epicocconone; D010447:Peptide Hydrolases; D010206:Papain