Structure of the human mTOR complex I and its implications for rapamycin inhibition.
Structure of the human mTOR complex I and its implications for rapamycin inhibition.
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DOI:
10.1016/j.molcel.2010.05.017
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发表时间:
2010-06-11
期刊:
影响因子:
16
通讯作者:
Kang SA
中科院分区:
文献类型:
--
作者:
Yip CK;Murata K;Walz T;Sabatini DM;Kang SA
The mammalian Target of Rapamycin Complex 1 (mTORC1) regulates cell growth in response to the nutrient and energy status of the cell, and its deregulation is common in human cancers. Little is known about the overall architecture and subunit organization of this essential signaling complex. We have determined the three-dimensional (3D) structure of the fully assembled human mTORC1 by cryo-electron microscopy (cryo-EM). Our analyses reveal that mTORC1 is an obligate dimer with an overall rhomboid shape and a central cavity. The dimeric interfaces are formed by interlocking interactions between the mTOR and raptor subunits. Extended incubation with FKBP12-rapamycin compromises the structural integrity of mTORC1 in a stepwise manner, leading us to propose a model in which rapamycin inhibits mTORC1-mediated phosphorylation of 4E-BP1 and S6K1 through different mechanisms.
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