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Biochim Biophys Acta. 2013 Jul;1834(7):1330-5. doi: 10.1016/j.bbapap.2013.02.039. Epub 2013 Mar 14.

Responsive microsecond-lifetime photoluminescent probes for analysis of protein kinases and their inhibitors.

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Institute of Chemistry, University of Tartu, 14A Ravila St., 50411 Tartu, Estonia.


Responsive ARC-Lum probes were used for measurement of the concentration of active protein kinases (PKs) and determination of affinity of inhibitors of PKs. ARC-Lum probes incorporate thiophene or a selenophene heterocycle and a fluorophore conjugated to the lysine residue in the peptide fragment. In the complex with a PK, ARC-Lum probes emit long-lifetime (microsecond-scale) luminescence at the emission wavelengths of the fluorescent label if the complex is illuminated at the excitation wavelength of the thiophene- or selenophene-containing phosphorescence donors. Bisubstrate ARC-Lum probes bind with sub-nanomolar affinity with several PKs of the AGC group. This article is part of a Special Issue entitled: Inhibitors of Protein Kinases (2012).

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