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: 1.7 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1016/j.molcel.2006.01.013
  • Primary Citation of Related Structures:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kelch-like ECH-associated protein 1
A
316Mus musculusGene Names: Keap1 (Inrf2, Kiaa0132)
Find proteins for Q9Z2X8 (Mus musculus)
Go to UniProtKB:  Q9Z2X8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear factor erythroid 2 related factor 2
B
9Mus musculusGene Names: Nfe2l2 (Nrf-2, Nrf2)
Find proteins for Q60795 (Mus musculus)
Go to UniProtKB:  Q60795
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.191 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 103.349α = 90.00
b = 103.349β = 90.00
c = 55.235γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance