Mammalian TOR complex 2 controls the actin cytoskeleton and is rapamycin insensitive

Mammalian TOR complex 2 controls the actin cytoskeleton and is rapamycin insensitive
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DOI:
10.1038/ncb1183
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发表时间:
2004-11-01
影响因子:
21.3
通讯作者:
Hall, MN
Hall, MN
中科院分区:
生物学1区
文献类型:
--
作者:
Jacinto, E;Loewith, R;Hall, MN

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雷帕霉素 (TOR) 的靶标是一种高度保守的蛋白激酶,也是细胞生长的中央控制器。在芽殖酵母中,TOR 存在于结构和功能不同的蛋白质复合物中:TORC1 和 TORC2。 TORC1 的哺乳动物对应物 (mTORC1) 已被描述,但尚不清楚 TORC2 在哺乳动物中是否保守。在这里,我们报道了 TORC2 的哺乳动物对应物 (mTORC2) 也存在。 mTORC2 包含 mTOR、mLST8 和 mAVO3,但不包含 raptor。与酵母 TORC2 一样,mTORC2 对雷帕霉素不敏感,并且似乎在 Rho GTPases 上游发挥作用,调节肌动蛋白细胞骨架。 mTORC2 不是 mTORC1 效应器 S6K 的上游。因此,两个不同的TOR复合物构成了真核进化中保守的原始信号网络,以控制细胞生长的基本过程。
The target of rapamycin ( TOR) is a highly conserved protein kinase and a central controller of cell growth. In budding yeast, TOR is found in structurally and functionally distinct protein complexes: TORC1 and TORC2. A mammalian counterpart of TORC1 (mTORC1) has been described, but it is not known whether TORC2 is conserved in mammals. Here, we report that a mammalian counterpart of TORC2 (mTORC2) also exists. mTORC2 contains mTOR, mLST8 and mAVO3, but not raptor. Like yeast TORC2, mTORC2 is rapamycin insensitive and seems to function upstream of Rho GTPases to regulate the actin cytoskeleton. mTORC2 is not upstream of the mTORC1 effector S6K. Thus, two distinct TOR complexes constitute a primordial signalling network conserved in eukaryotic evolution to control the fundamental process of cell growth.