3ADE

Crystal Structure of Keap1 in Complex with Sequestosome-1/p62


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The selective autophagy substrate p62 activates the stress responsive transcription factor Nrf2 through inactivation of Keap1

Komatsu, M.Kurokawa, H.Waguri, S.Taguchi, K.Kobayashi, A.Ichimura, Y.Sou, Y.S.Ueno, I.Sakamoto, A.Tong, K.I.Kim, M.Nishito, Y.Iemura, S.Natsume, T.Ueno, T.Kominami, E.Motohashi, H.Tanaka, K.Yamamoto, M.

(2010) Nat Cell Biol 12: 213-223

  • DOI: 10.1038/ncb2021
  • Primary Citation of Related Structures:  
    3ADE

  • PubMed Abstract: 
  • Impaired selective turnover of p62 by autophagy causes severe liver injury accompanied by the formation of p62-positive inclusions and upregulation of detoxifying enzymes. These phenotypes correspond closely to the pathological conditions seen in hum ...

    Impaired selective turnover of p62 by autophagy causes severe liver injury accompanied by the formation of p62-positive inclusions and upregulation of detoxifying enzymes. These phenotypes correspond closely to the pathological conditions seen in human liver diseases, including alcoholic hepatitis and hepatocellular carcinoma. However, the molecular mechanisms and pathophysiological processes in these events are still unknown. Here we report the identification of a novel regulatory mechanism by p62 of the transcription factor Nrf2, whose target genes include antioxidant proteins and detoxification enzymes. p62 interacts with the Nrf2-binding site on Keap1, a component of Cullin-3-type ubiquitin ligase for Nrf2. Thus, an overproduction of p62 or a deficiency in autophagy competes with the interaction between Nrf2 and Keap1, resulting in stabilization of Nrf2 and transcriptional activation of Nrf2 target genes. Our findings indicate that the pathological process associated with p62 accumulation results in hyperactivation of Nrf2 and delineates unexpected roles of selective autophagy in controlling the transcription of cellular defence enzyme genes.


    Organizational Affiliation

    Laboratory of Frontier Science, Tokyo Metropolitan Institute of Medical Science, Bunkyo-ku, Tokyo 113-8613, Japan. komatsu-ms@igakuken.or.jp



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Kelch-like ECH-associated protein 1A318Mus musculusMutation(s): 0 
Gene Names: Inrf2Keap1Kiaa0132
Find proteins for Q9Z2X8 (Mus musculus)
Explore Q9Z2X8 
Go to UniProtKB:  Q9Z2X8
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Sequestosome-1B14N/AMutation(s): 0 
Find proteins for Q64337 (Mus musculus)
Explore Q64337 
Go to UniProtKB:  Q64337
NIH Common Fund Data Resources
IMPC  MGI:107931
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.962α = 90
b = 102.962β = 90
c = 55.746γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-03-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance