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The Design, Synthesis and Potential Utility of Fluorescence Probes that Target DFG-out Conformation of p38α for High Throughput Screening Binding Assay


* Corresponding author: Haile Tecle,


The design, synthesis and utility of fluorescence probes that bind to the DFG-out conformation of p38α kinase are described. Probes that demonstrate good affinity for p38α, have been identified and one of the probes, PF-04438255, has been successfully used in an high throughput screening (HTS) assay to identify two novel non-classical p38α inhibitors. In addition, a cascade activity assay was utilized to validate the selective binding of these non-classical kinase inhibitors to the unactive form of the enzyme.

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