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- W2312602181 abstract "Live cell imaging requires bright photostable dyes that can target intracellular organelles and proteins with high specificity in a no-wash protocol. Organic dyes possess the desired photochemical properties and can be covalently linked to various protein tags. The currently available fluorogenic dyes are in the green/yellow range where there is high cellular autofluorescence and the near-infrared (NIR) dyes need to be washed out. Protein-mediated activation of far-red fluorogenic dyes has the potential to address these challenges because the cell-permeant dye is small and nonfluorescent until bound to its activating protein, and this binding is rapid. In this study, three single chain variable fragment (scFv)-derived fluorogen activating proteins (FAPs), which activate far-red emitting fluorogens, were evaluated for targeting, brightness, and photostability in the cytosol, nucleus, mitochondria, peroxisomes, and endoplasmic reticulum with a cell-permeant malachite green analog in cultured mammalian cells. Efficient labeling was achieved within 20–30 min for each protein upon the addition of nM concentrations of dye, producing a signal that colocalized significantly with a linked mCerulean3 (mCer3) fluorescent protein and organelle specific dyes but showed divergent photostability and brightness properties dependent on the FAP. These FAPs and the ester of malachite green dye (MGe) can be used as specific, rapid, and wash-free labels for intracellular sites in live cells with far-red excitation and emission properties, useful in a variety of multicolor experiments." @default.
- W2312602181 created "2016-06-24" @default.
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- W2312602181 date "2015-02-16" @default.
- W2312602181 modified "2023-09-30" @default.
- W2312602181 title "Rapid, Specific, No-wash, Far-red Fluorogen Activation in Subcellular Compartments by Targeted Fluorogen Activating Proteins" @default.
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- W2312602181 doi "https://doi.org/10.1021/cb500957k" @default.
- W2312602181 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4867890" @default.
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