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Fmoc-L-Phe-Aca-OH
Chemical name: 7-[N-alpha-(9-Fluorenylmethyloxycarbonyl)-L-phenylalaninyl-amido]-coumarin-4-acetic acid // Synonyms: (S)-2-(7-(2-(((9H-fluoren-9-yl)methoxy)carbonylamino)-3-phenylpropanamido)-2-oxo-2H-chromen-4-yl)acetic acid, Fmoc-Phe-Aca-OH
- Product code:FDP1240
- CAS No.:2250437-40-0
- Formula:C35H28N2O7
- Storage temperature:2-8°C
- Molecular weight:588.61 g/mol
- Purity :min. 98%
- Enantiomeric Purity:min. 99.7%
from $267.50
description
Peptide-7-amino-4-methylcoumarin conjugates (peptide-AMCs) are used as fluorogenic substrates to study proteases. If Phe-Aca is attached at the C terminus of cell penetrating peptides (CPP) the aromatic ring of phenylalanine quenches any fluorescence of aminomethylcoumarine. After internalization the Phe-Aca bond will be cleaved by proteases and Aca starts to show fluorescence demonstrating the internalization of the corresponding CPP.
The preparation of peptide-AMCs can either be carried out in solution phase or via solid-phase peptide synthesis (SPPS). This building block can be loaded on any solid support of choice as any other protected amino acid. After Fmoc removal, peptides are synthesized on the amino group of Phe using standard SPPS Fmoc chemistry. Fmoc-Phe couples on Aca with very low yield only, therefore, the Fmoc-Phe-Aca pseudo-dipeptide building block is the alternative of choice for successful synthesis of appropriate peptides. The crude peptide-7-aminocoumarin-4-acetic acid conjugates (peptide-ACAs) undergo facile decarboxylation under mild conditions to afford peptide-AMCs.
references
Harris, JL. et al. Proc. Natl. Acad. Sci. USA 2000; 97: 7754.
Maly, DJ. et al. J. Org. Chem. 2002; 67: 910.
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