Inhibitor hijacking of Akt activation.
Inhibitor hijacking of Akt activation.
复制标题
DOI:
10.1038/nchembio.183
复制
发表时间:
2009-07
影响因子:
14.8
通讯作者:
Shokat, Kevan M.
中科院分区:
文献类型:
--
作者:
Okuzumi, Tatsuya;Fiedler, Dorothea;Zhang, Chao;Gray, Daniel C.;Aizenstein, Brian;Hoffman, Randy;Shokat, Kevan M.
The kinase Akt plays a central role as a regulator of multiple growth factor input signals, making it an attractive anti-cancer drug target. A-443654 is an ATP-competitive Akt inhibitor. Unexpectedly, treatment of cells with A-443654 causes paradoxical hyperphosphorylation of Akt at its two regulatory sites (Thr308 and Ser473). We explore whether inhibitor-induced hyperphosphorylation of Akt by A-443654 is a consequence of disrupted feedback regulation at a pathway level or whether it is a direct consequence of inhibitor binding to the ATP binding site of Akt. Catalytically inactive mutants of Akt reveal that binding of an inhibitor to the ATP site of Akt is sufficient to directly cause hyperphosphorylation of the kinase in the absence of any pathway feedback effects. We conclude that ATP-competitive Akt inhibitors impart regulatory phosphorylation of their target kinase Akt providing new insights into both natural regulation of Akt activation and Akt inhibitors entering the clinic.
登录
查看更多内容
DOI:
10.1083/jcb.200403069
发表时间:
2004-07-19
期刊:
The Journal of cell biology
影响因子:
--
作者:
Harrington LS;Findlay GM;Gray A;Tolkacheva T;Wigfield S;Rebholz H;Barnett J;Leslie NR;Cheng S;Shepherd PR;Gout I;Downes CP;Lamb RF
通讯作者:
Lamb RF
影响因子:
56.9
作者:
Franke, TF;Kaplan, DR;Toker, A
通讯作者:
Toker, A
影响因子:
15
作者:
Bishop, AC;Kung, CY;Liu, Y
通讯作者:
Liu, Y
影响因子:
64.5
作者:
Knight, Zachary A.;Gonzalez, Beatriz;Shokat, Kevan M.
通讯作者:
Shokat, Kevan M.
影响因子:
64.8
作者:
Bishop, AC;Ubersax, JA;Shokat, KM
通讯作者:
Shokat, KM