3l8s

Human p38 MAP Kinase in Complex with CP-547632Human p38 MAP Kinase in Complex with CP-547632

Structural highlights 3l8s is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: , Related: 3hub, 3huc Gene: MAPK14, CSBP, CSBP1, CSBP2, CSPB1, MXI2 (Homo sapiens) Activity: Mitogen-activated protein kinase, with EC number 2.7.11.24 Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Targeting protein kinases with small organic molecules is a promising strategy to regulate unwanted kinase activity in both chemical biology and medicinal chemistry research. Traditionally, kinase inhibitors are identified in activity-based screening assays using enzymatically active kinase preparations to measure the perturbation of substrate phosphorylation, often resulting in the enrichment of classical ATP competitive (Type I) inhibitors. However, addressing enzymatically incompetent kinase conformations offers new opportunities for targeted therapies and is moving to the forefront of kinase inhibitor research. Here we report the development of a new FLiK (Fluorescent Labels in Kinases) binding assay to detect small molecules that induce changes in the conformation of the glycine-rich loop. Due to cross-talk between the glycine-rich loop and the activation loop in kinases, this alternative labeling approach can also detect ligands that stabilize inactive kinase conformations, including slow-binding Type II and Type III kinase inhibitors. Protein X-ray crystallography validated the assay results and identified a novel DFG-out binding mode for a quinazoline-based inhibitor in p38alpha kinase. We also detected the high-affinity binding of a clinically relevant and specific VEGFR2 inhibitor, and we provide structural details of its binding mode in p38alpha, in which it stabilizes the DFG-out conformation. Last, we demonstrate the power of this new FLiK labeling strategy to detect the binding of Type I ligands that induce conformational changes in the glycine-rich loop as a means of gaining affinity for the target kinase. This approach may be a useful alternative to develop direct binding assays for kinases that do not adopt the DFG-out conformation while also avoiding the use of expensive kits, detection reagents, or radioactivity frequently employed with activity-based assays. Fluorophore labeling of the glycine-rich loop as a method of identifying inhibitors that bind to active and inactive kinase conformations.,Simard JR, Getlik M, Grutter C, Schneider R, Wulfert S, Rauh D J Am Chem Soc. 2010 Mar 31;132(12):4152-60. PMID:20201574 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Mitogen-activated protein kinase

spinqualitylabelsall models 3l8s, resolution 2.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image