Issue 7, 2017

Kinase-templated abiotic reaction

Abstract

Protein kinases are quintessential regulators of cellular function. Numerous pathologies are intimately linked to the dysregulated activity of a particular protein kinase. Herein we report a technology based on a proximity-induced chemical transformation that enables the detection and imaging of specific kinases. Using two probes that target the nucleotide-binding site and substrate binding site of a target kinase respectively, the reagents appended on the probes are brought within reactive distance thereby enabling the chemical transformation. The reaction used for sensing is a ruthenium-photocatalyzed reduction of a pyridinium immolative linker, which uncages a fluorophore (rhodamine). We demonstrate that this technology can be used to discriminate between closely related kinases with a high signal to noise ratio. We further demonstrate that the technology operates within the complexity of a cellular context with a good correlation between the level of kinase activity and fluorescence output.

Graphical abstract: Kinase-templated abiotic reaction

Supplementary files

Article information

Article type
Edge Article
Submitted
30 Mar 2017
Accepted
20 May 2017
First published
24 May 2017
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2017,8, 5119-5125

Kinase-templated abiotic reaction

J. Saarbach, E. Lindberg, S. Folliet, S. Georgeon, O. Hantschel and N. Winssinger, Chem. Sci., 2017, 8, 5119 DOI: 10.1039/C7SC01416C

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