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.
Hall, Michael N.
中科院分区:
生物学2区
文献类型:
--
作者:
Sturgill, Thomas W.;Hall, Michael N.

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TOR(雷帕霉素靶蛋白)是一种高度保守的丝氨酸/苏氨酸激酶,是细胞生长的中心控制因子。利用相关的脂质激酶PI 3 KC γ的晶体结构,我们建立了TOR催化区域的模型,从FAT结构域到FATC结构域的末端附近。该模型显示,在Rheb独立性的遗传选择中在酵母中鉴定的TOR中的激活突变对应于PI 3 KC α中致癌突变的热点。激活突变位于TOR的催化结构域(螺旋kα3、kα9、kα11)和螺旋结构域。与小分子抑制剂(PP 242、NVP-BEZ 235和Ku-0063794)的对接研究表明,目前正在开发的药物利用新的药效团空间来实现特异性。因此,我们的模型提供了对TOR调控的见解,并可能有助于设计新的抗癌药物。
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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