1NVV

Structural evidence for feedback activation by RasGTP of the Ras-specific nucleotide exchange factor SOS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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This is version 1.3 of the entry. See complete history


Literature

Structural evidence for feedback activation by RasGTP of the Ras-specific nucleotide exchange factor SOS

Margarit, S.M.Sondermann, H.Hall, B.E.Nagar, B.Hoelz, A.Pirruccello, M.Bar-Sagi, D.Kuriyan, J.

(2003) Cell 112: 685-695

  • DOI: 10.1016/s0092-8674(03)00149-1
  • Primary Citation of Related Structures:  
    1NVU, 1NVV, 1NVW, 1NVX

  • PubMed Abstract: 
  • Growth factor receptors activate Ras by recruiting the nucleotide exchange factor son of sevenless (SOS) to the cell membrane, thereby triggering the production of GTP-loaded Ras. Crystallographic analyses of Ras bound to the catalytic module of SOS have led to the unexpected discovery of a highly conserved Ras binding site on SOS that is located distal to the active site and is specific for Ras ...

    Growth factor receptors activate Ras by recruiting the nucleotide exchange factor son of sevenless (SOS) to the cell membrane, thereby triggering the production of GTP-loaded Ras. Crystallographic analyses of Ras bound to the catalytic module of SOS have led to the unexpected discovery of a highly conserved Ras binding site on SOS that is located distal to the active site and is specific for Ras.GTP. The crystal structures suggest that Ras.GTP stabilizes the active site of SOS allosterically, and we show that Ras.GTP forms ternary complexes with SOS(cat) in solution and increases significantly the rate of SOS(cat)-stimulated nucleotide release from Ras. These results demonstrate the existence of a positive feedback mechanism for the spatial and temporal regulation of Ras.


    Organizational Affiliation

    Department of Molecular Genetics and Microbiology, State University of New York at Stony Brook, Stony Brook, NY 11794, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transforming protein p21/H-RAS-1A [auth Q]166Homo sapiensMutation(s): 1 
Gene Names: HRAS OR HRAS1HRASHRAS1
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P01112 (Homo sapiens)
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Go to UniProtKB:  P01112
PHAROS:  P01112
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Transforming protein p21/H-RAS-1B [auth R]166Homo sapiensMutation(s): 0 
Gene Names: HRAS OR HRAS1HRASHRAS1
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P01112 (Homo sapiens)
Explore P01112 
Go to UniProtKB:  P01112
PHAROS:  P01112
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Son of sevenless protein homolog 1C [auth S]481Homo sapiensMutation(s): 0 
Gene Names: SOS1
UniProt & NIH Common Fund Data Resources
Find proteins for Q07889 (Homo sapiens)
Explore Q07889 
Go to UniProtKB:  Q07889
PHAROS:  Q07889
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 184.163α = 90
b = 184.163β = 90
c = 179.076γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-04-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations