1U6D

Crystal structure of the Kelch domain of human Keap1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.149 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the kelch domain of human keap1

Li, X.Zhang, D.Hannink, M.Beamer, L.J.

(2004) J Biol Chem 279: 54750-54758

  • DOI: 10.1074/jbc.M410073200
  • Primary Citation of Related Structures:  
    1U6D

  • PubMed Abstract: 
  • Keap1 is a substrate adaptor protein for an ubiquitin ligase complex that targets the Nrf2 transcription factor for degradation. Keap1 binds Nrf2 through its C-terminal Kelch domain, which contains six copies of the evolutionarily conserved kelch repeat ...

    Keap1 is a substrate adaptor protein for an ubiquitin ligase complex that targets the Nrf2 transcription factor for degradation. Keap1 binds Nrf2 through its C-terminal Kelch domain, which contains six copies of the evolutionarily conserved kelch repeat sequence motif. The structure of the Kelch domain from human Keap1 has been determined by x-ray crystallography to a resolution of 1.85 A. The Kelch domain forms a 6-bladed beta-propeller structure, with residues at the C terminus forming the first strand in the first blade. Key structural roles have been identified for the highly conserved glycine, tyrosine, and tryptophan residues that define the kelch repeat sequence motif. In addition, we show that substitution of a single amino acid located within a loop that extends out from the bottom of the beta-propeller structure abolishes binding of Nrf2. The structure of the Kelch domain of Keap1 represents a high quality model for the superfamily of eukaryotic kelch repeat proteins and provides insight into how disease-causing mutations perturb the structural integrity of the Kelch domain.


    Related Citations: 
    • Crystallization and initial crystallographic analysis of the Kelch domain from human Keap1
      Li, X., Zhang, D., Hannink, M., Beamer, L.J.
      (2004) Acta Crystallogr D Biol Crystallogr 60: 2346

    Organizational Affiliation

    Department of Biochemistry, University of Misouri-Columbia, Misouri 65211, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
kelch-like ECH-associated protein 1 X308Homo sapiensMutation(s): 0 
Gene Names: KEAP1INRF2KIAA0132KLHL19
Find proteins for Q14145 (Homo sapiens)
Explore Q14145 
Go to UniProtKB:  Q14145
NIH Common Fund Data Resources
PHAROS:  Q14145
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.149 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.892α = 90
b = 85.892β = 90
c = 148.753γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
CCP4data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance