Structure of the human mTOR Complex I and its implications for rapamycin inhibition
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Sabatini_Structure of.pdf
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Author(s)
Yip, Calvin K.
Murata, Kazuyoshi
Walz, Thomas
Kang, Seong A.
Sabatini, David
Date Issued
June 2010
Journal
Molecular Cell
Publisher
Elsevier
Citation
Yip, Calvin K. et al. “Structure of the Human mTOR Complex I and Its Implications for Rapamycin Inhibition.” Molecular Cell 38.5 (2010): 768–774.
Version
Author's final manuscript
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Biology
Koch Institute for Integrative Cancer Research at MIT
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1016/j.molcel.2010.05.017
