7JIG

HRAS A59T GppNHp crystal 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.187 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Regulation of GTPase function by autophosphorylation.

Johnson, C.W.Seo, H.S.Terrell, E.M.Yang, M.H.KleinJan, F.Gebregiworgis, T.Gasmi-Seabrook, G.M.C.Geffken, E.A.Lakhani, J.Song, K.Bashyal, P.Popow, O.Paulo, J.A.Liu, A.Mattos, C.Marshall, C.B.Ikura, M.Morrison, D.K.Dhe-Paganon, S.Haigis, K.M.

(2022) Mol Cell 82: 950

  • DOI: https://doi.org/10.1016/j.molcel.2022.02.011
  • Primary Citation of Related Structures:  
    7JIF, 7JIG, 7JIH, 7JII, 7KMR

  • PubMed Abstract: 

    A unifying feature of the RAS superfamily is a conserved GTPase cycle by which these proteins transition between active and inactive states. We demonstrate that autophosphorylation of some GTPases is an intrinsic regulatory mechanism that reduces nucleotide hydrolysis and enhances nucleotide exchange, altering the on/off switch that forms the basis for their signaling functions. Using X-ray crystallography, nuclear magnetic resonance spectroscopy, binding assays, and molecular dynamics on autophosphorylated mutants of H-RAS and K-RAS, we show that phosphoryl transfer from GTP requires dynamic movement of the switch II region and that autophosphorylation promotes nucleotide exchange by opening the active site and extracting the stabilizing Mg 2+ . Finally, we demonstrate that autophosphorylated K-RAS exhibits altered effector interactions, including a reduced affinity for RAF proteins in mammalian cells. Thus, autophosphorylation leads to altered active site dynamics and effector interaction properties, creating a pool of GTPases that are functionally distinct from their non-phosphorylated counterparts.


  • Organizational Affiliation

    Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Medicine, Brigham & Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GTPase HRas166Homo sapiensMutation(s): 1 
Gene Names: HRASHRAS1
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
GTEx:  ENSG00000174775 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01112
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.187 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.964α = 90
b = 38.964β = 90
c = 159.048γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PDB_EXTRACTdata extraction
HKL-3000data reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesR01CA230718
American Cancer SocietyUnited States30428-PF-17-066-01-TBG

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-02
    Type: Initial release
  • Version 1.1: 2022-03-09
    Changes: Database references
  • Version 1.2: 2022-03-16
    Changes: Database references
  • Version 1.3: 2023-10-18
    Changes: Data collection, Refinement description