5ZCS

4.9 Angstrom Cryo-EM structure of human mTOR complex 2

  • Classification: GENE REGULATION
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens
  • Mutation(s): No 

  • Deposited: 2018-02-20 Released: 2018-03-21 
  • Deposition Author(s): Chen, X., Liu, M., Tian, Y., Wang, H., Wang, J., Xu, Y.
  • Funding Organization(s): Ministry of Science and Technology (China), National Natural Science Foundation of China, Strategic Priority Research Program of the Chinese Academy of Sciences, National Program for support of Top-Notch Young Professionals

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Cryo-EM structure of human mTOR complex 2.

Chen, X.Liu, M.Tian, Y.Li, J.Qi, Y.Zhao, D.Wu, Z.Huang, M.Wong, C.C.L.Wang, H.W.Wang, J.Yang, H.Xu, Y.

(2018) Cell Res 28: 518-528

  • DOI: 10.1038/s41422-018-0029-3
  • Primary Citation of Related Structures:  
    5ZCS

  • PubMed Abstract: 
  • Mechanistic target of rapamycin (mTOR) complex 2 (mTORC2) plays an essential role in regulating cell proliferation through phosphorylating AGC protein kinase family members, including AKT, PKC and SGK1. The functional core complex consists of mTOR, m ...

    Mechanistic target of rapamycin (mTOR) complex 2 (mTORC2) plays an essential role in regulating cell proliferation through phosphorylating AGC protein kinase family members, including AKT, PKC and SGK1. The functional core complex consists of mTOR, mLST8, and two mTORC2-specific components, Rictor and mSin1. Here we investigated the intermolecular interactions within mTORC2 complex and determined its cryo-electron microscopy structure at 4.9 Å resolution. The structure reveals a hollow rhombohedral fold with a 2-fold symmetry. The dimerized mTOR serves as a scaffold for the complex assembly. The N-terminal half of Rictor is composed of helical repeat clusters and binds to mTOR through multiple contacts. mSin1 is located close to the FRB domain and catalytic cavity of mTOR. Rictor and mSin1 together generate steric hindrance to inhibit binding of FKBP12-rapamycin to mTOR, revealing the mechanism for rapamycin insensitivity of mTORC2. The mTOR dimer in mTORC2 shows more compact conformation than that of mTORC1 (rapamycin sensitive), which might result from the interaction between mTOR and Rictor-mSin1. Structural comparison shows that binding of Rictor and Raptor (mTORC1-specific component) to mTOR is mutually exclusive. Our study provides a basis for understanding the assembly of mTORC2 and a framework to further characterize the regulatory mechanism of mTORC2 pathway.


    Organizational Affiliation

    CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, 200031, China. xuyh@fudan.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase mTORAB2549Homo sapiensMutation(s): 0 
Gene Names: MTORFRAPFRAP1FRAP2RAFT1RAPT1
EC: 2.7.11.1
Find proteins for P42345 (Homo sapiens)
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Go to UniProtKB:  P42345
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PHAROS  P42345
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Target of rapamycin complex subunit LST8CD326Homo sapiensMutation(s): 0 
Gene Names: MLST8GBLLST8
Find proteins for Q9BVC4 (Homo sapiens)
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PHAROS  Q9BVC4
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Rapamycin-insensitive companion of mTOREF1708Homo sapiensMutation(s): 0 
Gene Names: RICTORKIAA1999
Find proteins for Q6R327 (Homo sapiens)
Explore Q6R327 
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PHAROS  Q6R327
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Target of rapamycin complex 2 subunit MAPKAP1GH522Homo sapiensMutation(s): 0 
Gene Names: MAPKAP1
Find proteins for Q9BPZ7 (Homo sapiens)
Explore Q9BPZ7 
Go to UniProtKB:  Q9BPZ7
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PHAROS  Q9BPZ7
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (China)China2016YFA0500700,2016YFA0501100
National Natural Science Foundation of ChinaChina31770781,U1432242,31425008,91419301
Strategic Priority Research Program of the Chinese Academy of SciencesChinaXDB08000000
National Program for support of Top-Notch Young ProfessionalsChina--

Revision History 

  • Version 1.0: 2018-03-21
    Type: Initial release
  • Version 1.1: 2018-04-04
    Changes: Data collection, Database references
  • Version 1.2: 2018-05-30
    Changes: Data collection, Database references
  • Version 1.3: 2019-11-06
    Changes: Data collection, Other