3ADE

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.232 
  • R-Value Work: 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

  • 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: 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
Sequestosome-1
B
14Mus musculusMutation(s): 0 
Gene Names: Sqstm1 (A170, STAP)
Find proteins for Q64337 (Mus musculus)
Go to UniProtKB:  Q64337
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: 2.8 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.178 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 102.962α = 90.00
b = 102.962β = 90.00
c = 55.746γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
CNSrefinement
HKL-2000data reduction
HKL-2000data collection
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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