2DYH

Crystal structure of the Keap1 protein in complexed with the N-terminal region of the Nrf2 transcription factor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Different electrostatic potentials define ETGE and DLG motifs as hinge and latch in oxidative stress response

Tong, K.I.Padmanabhan, B.Kobayashi, A.Shang, C.Hirotsu, Y.Yokoyama, S.Yamamoto, M.

(2007) Mol.Cell.Biol. 27: 7511-7521

  • DOI: 10.1128/MCB.00753-07

  • PubMed Abstract: 
  • Nrf2 is the regulator of the oxidative/electrophilic stress response. Its turnover is maintained by Keap1-mediated proteasomal degradation via a two-site substrate recognition mechanism in which two Nrf2-Keap1 binding sites form a hinge and latch. Th ...

    Nrf2 is the regulator of the oxidative/electrophilic stress response. Its turnover is maintained by Keap1-mediated proteasomal degradation via a two-site substrate recognition mechanism in which two Nrf2-Keap1 binding sites form a hinge and latch. The E3 ligase adaptor Keap1 recognizes Nrf2 through its conserved ETGE and DLG motifs. In this study, we examined how the ETGE and DLG motifs bind to Keap1 in a very similar fashion but with different binding affinities by comparing the crystal complex of a Keap1-DC domain-DLG peptide with that of a Keap1-DC domain-ETGE peptide. We found that these two motifs interact with the same basic surface of either Keap1-DC domain of the Keap1 homodimer. The DLG motif works to correctly position the lysines within the Nrf2 Neh2 domain for efficient ubiquitination. Together with the results from calorimetric and functional studies, we conclude that different electrostatic potentials primarily define the ETGE and DLG motifs as a hinge and latch that senses the oxidative/electrophilic stress.


    Organizational Affiliation

    Graduate School of Comprehensive Human Sciences, Center for TARA, JST-ERATO Environmental Response Project, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8577, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kelch-like ECH-associated protein 1
A
318Mus musculusMutation(s): 0 
Gene Names: Keap1 (Inrf2, Kiaa0132)
Find proteins for Q9Z2X8 (Mus musculus)
Go to UniProtKB:  Q9Z2X8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nrf2/Neh2 peptide from Nuclear factor erythroid 2-related factor 2
B
15Mus musculusMutation(s): 0 
Gene 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: 1.9 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 103.131α = 90.00
b = 103.131β = 90.00
c = 56.141γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
DNAdata collection
MOLREPphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance