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- W2023626818 abstract "Live cell imaging is a powerful method to study protein dynamics at the cell surface, but conventional imaging probes are bulky, or interfere with protein function, or dissociate from proteins after internalization. Here, we report technology for covalent, specific tagging of cellular proteins with chemical probes. Through rational design, we redirected a microbial lipoic acid ligase (LplA) to specifically attach an alkyl azide onto an engineered LplA acceptor peptide (LAP). The alkyl azide was then selectively derivatized with cyclo-octyne conjugates to various probes. We labeled LAP fusion proteins expressed in living mammalian cells with Cy3, Alexa Fluor 568 and biotin. We also combined LplA labeling with our previous biotin ligase labeling, to simultaneously image the dynamics of two different receptors, coexpressed in the same cell. Our methodology should provide general access to biochemical and imaging studies of cell surface proteins, using small fluorophores introduced via a short peptide tag." @default.
- W2023626818 created "2016-06-24" @default.
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- W2023626818 date "2007-12-01" @default.
- W2023626818 modified "2023-10-01" @default.
- W2023626818 title "Redirecting lipoic acid ligase for cell surface protein labeling with small-molecule probes" @default.
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- W2023626818 doi "https://doi.org/10.1038/nbt1355" @default.
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