2RGC

Crystal structure of H-RasQ61V-GppNHp

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Transformation Efficiency of RasQ61 Mutants Linked to Structural Features of the Switch Regions in the Presence of Raf.

Buhrman, G., Wink, G., Mattos, C.

(2007) Structure 15: 1618-1629

  • DOI: 10.1016/j.str.2007.10.011
  • Primary Citation of Related Structures:  
    2RGE, 2RGD, 2RGC, 2RGB, 2RGA, 2RGG

  • PubMed Abstract: 

    • Transformation efficiencies of Ras mutants at residue 61 range over three orders of magnitude, but the in vitro GTPase activity decreases 10-fold for all mutants. We show that Raf impairs the GTPase activity of RasQ61L, suggesting that the Ras/Raf complex differentially modulates transformation ...

    Transformation efficiencies of Ras mutants at residue 61 range over three orders of magnitude, but the in vitro GTPase activity decreases 10-fold for all mutants. We show that Raf impairs the GTPase activity of RasQ61L, suggesting that the Ras/Raf complex differentially modulates transformation. Our crystal structures show that, in transforming mutants, switch II takes part in a network of hydrophobic interactions burying the nucleotide and precatalytic water molecule. Our results suggest that Y32 and a water molecule bridging it to the gamma-phosphate in the wild-type structure play a role in GTP hydrolysis in lieu of the Arg finger in the absence of GAP. The bridging water molecule is absent in the transforming mutants, contributing to the burying of the nucleotide. We propose a mechanism for intrinsic hydrolysis in Raf-bound Ras and elucidate structural features in the Q61 mutants that correlate with their potency to transform cells.

    Organizational Affiliation: 

    Department of Molecular and Structural Biochemistry, North Carolina State University, 128 Polk Hall-CB 7622, Raleigh, NC 27695, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTPase HRasA166Homo sapiensMutation(s): 1 
Gene Names: HRAS, HRAS1
EC: 3.6.5.2
Find proteins for P01112 (Homo sapiens)
Explore P01112 
Go to UniProtKB:  P01112
NIH Common Fund Data Resources
PHAROS:  P01112
GTEx:  ENSG00000174775
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GNP
Query on GNP
Download Ideal Coordinates CCD File 
 E [auth A]PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
 C [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 B [auth A], D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.43α = 90
b = 88.43β = 90
c = 132.69γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-12-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance