1X2R

Structural basis for the defects of human lung cancer somatic mutations in the repression activity of Keap1 on Nrf2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 

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


Literature

Structural basis for defects of keap1 activity provoked by its point mutations in lung cancer

Padmanabhan, B.Tong, K.I.Ohta, T.Nakamura, Y.Scharlock, M.Ohtsuji, M.Kang, M.-I.Kobayashi, A.Yokoyama, S.Yamamoto, M.

(2006) Mol Cell 21: 689-700

  • DOI: https://doi.org/10.1016/j.molcel.2006.01.013
  • Primary Citation of Related Structures:  
    1X2J, 1X2R

  • PubMed Abstract: 

    Nrf2 regulates the cellular oxidative stress response, whereas Keap1 represses Nrf2 through its molecular interaction. To elucidate the molecular mechanism of the Keap1 and Nrf2 interaction, we resolved the six-bladed beta propeller crystal structure of the Kelch/DGR and CTR domains of mouse Keap1 and revealed that extensive inter- and intrablade hydrogen bonds maintain the structural integrity and proper association of Keap1 with Nrf2. A peptide containing the ETGE motif of Nrf2 binds the beta propeller of Keap1 at the entrance of the central cavity on the bottom side via electrostatic interactions with conserved arginine residues. We found a somatic mutation and a gene variation in human lung cancer cells that change glycine to cysteine in the DGR domain, introducing local conformational changes that reduce Keap1's affinity for Nrf2. These results provide a structural basis for the loss of Keap1 function and gain of Nrf2 function.


  • Organizational Affiliation

    RIKEN Genomic Sciences Center, Tsurumi, Yokohama 230-0045, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kelch-like ECH-associated protein 1316Mus musculusMutation(s): 0 
UniProt
Find proteins for Q9Z2X8 (Mus musculus)
Explore Q9Z2X8 
Go to UniProtKB:  Q9Z2X8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Z2X8
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nuclear factor erythroid 2 related factor 29N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q60795 (Mus musculus)
Explore Q60795 
Go to UniProtKB:  Q60795
IMPC:  MGI:108420
Entity Groups  
UniProt GroupQ60795
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.349α = 90
b = 103.349β = 90
c = 55.235γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
MOLREPphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-03-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description