Synthesis of N epsilon-(7-diethylaminocoumarin-3-carboxyl)- and N epsilon-(7-methoxycoumarin-3-carboxyl)-L-Fmoc lysine as tools for protease cleavage detection by fluorescence. |
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Authors: | Thomas Berthelot Jean‐Claude Talbot Georges Laïn Grard Dleris Laurent Latxague |
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Institution: | Groupe de Chimie Bio-Organique, Université Victor Segalen Bordeaux 2, France. |
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Abstract: | Two coumarin-labelled lysines were conveniently prepared as a fluorescence resonance energy transfer (FRET) pair for peptide cleavage detection. 7-Methoxy and 7-diethylamino coumarin-3-carboxylic acids were synthesized according to a modification of known procedures. Labelling at lysine was achieved in solution via the active N-hydroxysuccinimide ester of the carboxylic acid coumarin derivatives to give the target compounds in good yield. Subsequently, these modified amino acids were used in solid phase peptide synthesis (SPPS), and their potential utility in an extracellular matrix metalloprotease (MMP-1) activity measurement via FRET and/or quenching studies was demonstrated. |
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Keywords: | fluorogenic substrates fluorescent amino acids coumarins matrix metalloprotease activity |
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