Discovery of a Potent and Isoform-Selective Targeted Covalent Inhibitor of the Lipid Kinase Pi3Kalpha
Nacht, M., Qiao, L., Sheets, M.P., Martin, T.S., Labenski, M., Mazdiyasni, H., Karp, R., Zhu, Z., Chaturvedi, P., Bhavsar, D., Niu, D., Westlin, W., Petter, R.C., Medikonda, A.P., Singh, J.(2013) J Med Chem 56: 712
- PubMed: 23360348 
- DOI: 10.1021/jm3008745
- Primary Citation of Related Structures:  
3ZIM - PubMed Abstract: 
PI3Kα has been identified as an oncogene in human tumors. By use of rational drug design, a targeted covalent inhibitor 3 (CNX-1351) was created that potently and specifically inhibits PI3Kα. We demonstrate, using mass spectrometry and X-ray crystallography, that the selective inhibitor covalently modifies PI3Kα on cysteine 862 (C862), an amino acid unique to the α isoform, and that PI3Kβ, -γ, and -δ are not covalently modified ...