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- W2079620307 abstract "In many protein kinases, a characteristic conformational change (the “DFG flip”) connects catalytically active and inactive conformations. Many kinase inhibitors—including the cancer drug imatinib—selectively target a specific DFG conformation, but the function and mechanism of the flip remain unclear. Using long molecular dynamics simulations of the Abl kinase, we visualized the DFG flip in atomic-level detail and formulated an energetic model predicting that protonation of the DFG aspartate controls the flip. Consistent with our model's predictions, we demonstrated experimentally that the kinetics of imatinib binding to Abl kinase have a pH dependence that disappears when the DFG aspartate is mutated. Our model suggests a possible explanation for the high degree of conservation of the DFG motif: that the flip, modulated by electrostatic changes inherent to the catalytic cycle, allows the kinase to access flexible conformations facilitating nucleotide binding and release." @default.
- W2079620307 created "2016-06-24" @default.
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- W2079620307 date "2009-01-06" @default.
- W2079620307 modified "2023-09-28" @default.
- W2079620307 title "A conserved protonation-dependent switch controls drug binding in the Abl kinase" @default.
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- W2079620307 doi "https://doi.org/10.1073/pnas.0811223106" @default.
- W2079620307 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2610013" @default.
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- W2079620307 hasPublicationYear "2009" @default.
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