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Hydrophilic trans-cyclooctenylated noncanonical amino acids for fast intracellular protein labeling

Abstract Introduction of bioorthogonal functionalities (e.g., trans-cyclooctene-TCO) into a protein of interest by site-specific genetic encoding of non-canonical amino acids (ncAAs) creates uniquely targetable platforms for fluorescent labeling schemes in combination with tetrazine-functionalized d...

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Main Authors: Kozma, Eszter (Author) , Nikić, Ivana (Author) , Varga, Balázs R. (Author) , Aramburu, Iker Valle (Author) , Kang, Jun Hee (Author) , Fackler, Oliver Till (Author) , Lemke, Edward A. (Author) , Kele, Péter (Author)
Format: Article (Journal)
Language:English
Published: 25 May 2016
In: ChemBioChem
Year: 2016, Volume: 17, Issue: 16, Pages: 1518-1524
ISSN:1439-7633
DOI:10.1002/cbic.201600284
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/cbic.201600284
Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cbic.201600284
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Author Notes:Eszter Kozma, Ivana Nikić, Balázs R. Varga, Iker Valle Aramburu, Jun Hee Kang, Oliver T. Fackler, Edward A. Lemke, and Péter Kele
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Summary:Abstract Introduction of bioorthogonal functionalities (e.g., trans-cyclooctene-TCO) into a protein of interest by site-specific genetic encoding of non-canonical amino acids (ncAAs) creates uniquely targetable platforms for fluorescent labeling schemes in combination with tetrazine-functionalized dyes. However, fluorescent labeling of an intracellular protein is usually compromised by high background, arising from the hydrophobicity of ncAAs; this is typically compensated for by hours-long washout to remove excess ncAAs from the cellular interior. To overcome these problems, we designed, synthesized, and tested new, hydrophilic TCO-ncAAs. One derivative, DOTCO-lysine was genetically incorporated into proteins with good yield. The increased hydrophilicity shortened the excess ncAA washout time from hours to minutes, thus permitting rapid labeling and subsequent fluorescence microscopy.
Item Description:Gesehen am 25.05.2020
Physical Description:Online Resource
ISSN:1439-7633
DOI:10.1002/cbic.201600284

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