3R7W

Crystal Structure of Gtr1p-Gtr2p complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 

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Literature

Crystal structure of the Gtr1p-Gtr2p complex reveals new insights into the amino acid-induced TORC1 activation

Gong, R.Li, L.Liu, Y.Wang, P.Yang, H.Wang, L.Cheng, J.Guan, K.L.Xu, Y.

(2011) Genes Dev 25: 1668-1673

  • DOI: 10.1101/gad.16968011
  • Primary Citation of Related Structures:  
    3R7W

  • PubMed Abstract: 
  • The target of rapamycin (TOR) complex 1 (TORC1) is a central cell growth regulator in response to a wide array of signals. The Rag GTPases play an essential role in relaying amino acid signals to TORC1 activation through direct interaction with raptor and recruitment of the TORC1 complex to lysosomes ...

    The target of rapamycin (TOR) complex 1 (TORC1) is a central cell growth regulator in response to a wide array of signals. The Rag GTPases play an essential role in relaying amino acid signals to TORC1 activation through direct interaction with raptor and recruitment of the TORC1 complex to lysosomes. Here we present the crystal structure of the Gtr1p-Gtr2p complex, the Rag homologs from Saccharomyces cerevisiae, at 2.8 Å resolution. The heterodimeric GTPases reveal a pseudo-twofold symmetric organization. Structure-guided functional analyses of RagA-RagC, the human homologs of Gtr1p-Gtr2p, show that both G domains (N-terminal GTPase domains) and dimerization are important for raptor binding. In particular, the switch regions of the G domain in RagA are indispensible for interaction with raptor, and hence TORC1 activation. The dimerized C-terminal domains of RagA-RagC display a remarkable structural similarity to MP1/p14, which is in a complex with lysosome membrane protein p18, and directly interact with p18, therefore recruiting mTORC1 to the lysosome for activation by Rheb. Our results reveal a structural model for the mechanism of the Rag GTPases in TORC1 activation and amino acid signaling.


    Organizational Affiliation

    Cancer Institute, Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-binding protein GTR1A, C307Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GTR1
UniProt
Find proteins for Q00582 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q00582 
Go to UniProtKB:  Q00582
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-binding protein GTR2B, D331Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GTR2
UniProt
Find proteins for P53290 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P53290 
Go to UniProtKB:  P53290
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, CL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.908α = 90
b = 148.439β = 100.61
c = 98.508γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-24
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Database references