2FLU

Crystal Structure of the Kelch-Neh2 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Keap1:Nrf2 interface provides mechanistic insight into Nrf2 signaling.

Lo, S.C.Li, X.Henzl, M.T.Beamer, L.J.Hannink, M.

(2006) Embo J. 25: 3605-3617

  • DOI: 10.1038/sj.emboj.7601243

  • PubMed Abstract: 
  • Keap1 is a BTB-Kelch substrate adaptor protein that regulates steady-state levels of Nrf2, a bZIP transcription factor, in response to oxidative stress. We have determined the structure of the Kelch domain of Keap1 bound to a 16-mer peptide from Nrf2 ...

    Keap1 is a BTB-Kelch substrate adaptor protein that regulates steady-state levels of Nrf2, a bZIP transcription factor, in response to oxidative stress. We have determined the structure of the Kelch domain of Keap1 bound to a 16-mer peptide from Nrf2 containing a highly conserved DxETGE motif. The Nrf2 peptide contains two short antiparallel beta-strands connected by two overlapping type I beta-turns stabilized by the aspartate and threonine residues. The beta-turn region fits into a binding pocket on the top face of the Kelch domain and the glutamate residues form multiple hydrogen bonds with highly conserved residues in Keap1. Mutagenesis experiments confirmed the role of individual amino acids for binding of Nrf2 to Keap1 and for Keap1-mediated repression of Nrf2-dependent gene expression. Our results provide a detailed picture of how a BTB-Kelch substrate adaptor protein binds to its cognate substrate and will enable the rational design of novel chemopreventive agents.


    Organizational Affiliation

    Department of Biochemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kelch-like ECH-associated protein 1
X
308Homo sapiensGene Names: KEAP1 (INRF2, KIAA0132, KLHL19)
Find proteins for Q14145 (Homo sapiens)
Go to Gene View: KEAP1
Go to UniProtKB:  Q14145
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nrf2
P
16Homo sapiensGene Names: NFE2L2 (NRF2)
Find proteins for Q16236 (Homo sapiens)
Go to Gene View: NFE2L2
Go to UniProtKB:  Q16236
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.179 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 76.757α = 90.00
b = 92.069β = 90.00
c = 46.314γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata scaling
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-08-15
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance