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Goh, Walter L; Lee, Min Yen; Joseph, Thomas L; Quah, Soo Tng; Brown, Christopher J; Verma, Chandra; Brenner, Sydney; Ghadessy, Farid J; Teo, Yin Nah
Journal of the American Chemical Society, 04/2014, Letnik: 136, Številka: 17Journal Article
We demonstrate the use of fluorescent molecular rotors as probes for detecting biomolecular interactions, specifically peptide–protein interactions. Molecular rotors undergo twisted intramolecular charge transfer upon irradiation, relax via the nonradiative torsional relaxation pathway, and have been typically used as viscosity probes. Their utility as a tool for detecting specific biomolecular interactions has not been explored. Using the well characterized p53–Mdm2 interaction as a model system, we designed a 9-(2-carboxy-2-cyanovinyl) julolidine-based p53 peptide reporter, JP1-R, which fluoresces conditionally only upon Mdm2 binding. The reporter was used in a rapid, homogeneous assay to screen a fragment library for antagonists of the p53–Mdm2 interaction, and several inhibitors were identified. Subsequent validation of these hits using established secondary assays suggests increased sensitivity afforded by JP1-R. The fluorescence of molecular rotors contingent upon target binding makes them a versatile tool for detecting specific biomolecular interactions.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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