3qk0
Crystal structure of PI3K-gamma in complex with benzothiazole 82Crystal structure of PI3K-gamma in complex with benzothiazole 82
Structural highlights
Publication Abstract from PubMedPhosphoinositide 3-kinase alpha (PI3Kalpha) is a lipid kinase that plays a key regulatory role in several cellular processes. The mutation or amplification of this kinase in humans has been implicated in the growth of multiple tumor types. Consequently, PI3Kalpha has become a target of intense research for drug discovery. Our studies began with the identification of benzothiazole compound 1 from a high throughput screen. Extensive SAR studies led to the discovery of sulfonamide 45 as an early lead, based on its in vitro cellular potency. Subsequent modifications of the central pyrimidine ring dramatically improved enzyme and cellular potency and led to the identification of chloropyridine 70. Further arylsulfonamide SAR studies optimized in vitro clearance and led to the identification of 82 as a potent dual inhibitor of PI3K and mTOR. This molecule exhibited potent enzyme and cell activity, low clearance, and high oral bioavailability. In addition, compound 82 demonstrated tumor growth inhibition in U-87 MG, A549, and HCT116 tumor xenograft models. Discovery and Optimization of a Series of Benzothiazole Phosphoinositide 3-Kinase (PI3K)/Mammalian Target of Rapamycin (mTOR) Dual Inhibitors.,D'Angelo ND, Kim TS, Andrews K, Booker SK, Caenepeel S, Chen K, D'Amico D, Freeman D, Jiang J, Liu L, McCarter JD, San Miguel T, Mullady EL, Schrag M, Subramanian R, Tang J, Wahl RC, Wang L, Whittington DA, Wu T, Xi N, Xu Y, Yakowec P, Yang K, Zalameda LP, Zhang N, Hughes P, Norman MH J Med Chem. 2011 Mar 24;54(6):1789-811. Epub 2011 Feb 18. PMID:21332118[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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