4XPM

Crystal structure of EGO-TC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

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Literature

Crystal structure of the Ego1-Ego2-Ego3 complex and its role in promoting Rag GTPase-dependent TORC1 signaling.

Powis, K.Zhang, T.Panchaud, N.Wang, R.De Virgilio, C.Ding, J.

(2015) Cell Res 25: 1043-1059

  • DOI: 10.1038/cr.2015.86
  • Primary Citation of Related Structures:  
    4XPM

  • PubMed Abstract: 
  • The target of rapamycin complex 1 (TORC1) integrates various hormonal and nutrient signals to regulate cell growth, proliferation, and differentiation. Amino acid-dependent activation of TORC1 is mediated via the yeast EGO complex (EGOC) consisting of Gtr1, Gtr2, Ego1, and Ego3 ...

    The target of rapamycin complex 1 (TORC1) integrates various hormonal and nutrient signals to regulate cell growth, proliferation, and differentiation. Amino acid-dependent activation of TORC1 is mediated via the yeast EGO complex (EGOC) consisting of Gtr1, Gtr2, Ego1, and Ego3. Here, we identify the previously uncharacterized Ycr075w-a/Ego2 protein as an additional EGOC component that is required for the integrity and localization of the heterodimeric Gtr1-Gtr2 GTPases, equivalent to mammalian Rag GTPases. We also report the crystal structure of the Ego1-Ego2-Ego3 ternary complex (EGO-TC) at 2.4 Å resolution, in which Ego2 and Ego3 form a heterodimer flanked along one side by Ego1. Structural data also reveal the structural conservation of protein components between the yeast EGO-TC and the human Ragulator, which acts as a GEF for Rag GTPases. Interestingly, however, artificial tethering of Gtr1-Gtr2 to the vacuolar membrane is sufficient to activate TORC1 in response to amino acids even in the absence of the EGO-TC. Our structural and functional data therefore support a model in which the EGO-TC acts as a scaffold for Rag GTPases in TORC1 signaling.


    Organizational Affiliation

    National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein MEH1A39Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MEH1EGO1GSE2YKR007WYK106
Find proteins for Q02205 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  Q02205
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Uncharacterized protein YCR075W-AB76Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: YCR075W-A
Find proteins for Q3E830 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  Q3E830
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein SLM4C162Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SLM4EGO3GSE1YBR077CYBR0723
Find proteins for P38247 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38247 
Go to UniProtKB:  P38247
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.118α = 90
b = 48.118β = 90
c = 223.377γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-10-14
    Changes: Database references