Activating mutations in TOR are in similar structures as oncogenic mutations in PI3KCalpha.
Activating mutations in TOR are in similar structures as oncogenic mutations in PI3KCalpha.
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DOI:
10.1021/cb900193e
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发表时间:
2009-12-18
影响因子:
4
通讯作者:
Hall, Michael N.
中科院分区:
文献类型:
--
作者:
Sturgill, Thomas W.;Hall, Michael N.
TOR (Target of Rapamycin) is a highly conserved Ser/Thr kinase and a central controller of cell growth. Using the crystal structure of the related lipid kinase PI3KCγ, we built a model of the catalytic region of TOR, from the FAT domain to near the end of the FATC domain. The model reveals that activating mutations in TOR, identified in yeast in a genetic selection for Rheb-independence, correspond to hotspots for oncogenic mutations in PI3KCα. The activating mutations are in the catalytic domain (helices kα3, kα9, kα11) and the helical domain of TOR. Docking studies with small molecule inhibitors (PP242, NVP-BEZ235, and Ku-0063794) show that drugs currently in development utilize a novel pharmacophore space to achieve specificity. Thus, our model provides insight on the regulation of TOR and may be useful in the design of new anticancer drugs.
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