Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 37479.77 
• Atom Count: 2356 
• Residue Count: 333 
• Unique protein chains: 2

2DYH

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

• DOI: 10.2210/pdb2DYH/pdb

• Classification: TRANSCRIPTION
• Organism(s): Mus musculus
• Expression System: Escherichia coli


• Deposited: 2006-09-14 Released: 2007-09-04 
• Deposition Author(s): Padmanabhan, B., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

---

Experimental Data Snapshot

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

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

• PubMed: 17785452 
• 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. 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
Molecule	Chains	Sequence Length	Organism	Details
Kelch-like ECH-associated protein 1	A	318	Mus musculus	Mutation(s): 0  Gene Names: Keap1 (Inrf2, Kiaa0132)
Find proteins for Q9Z2X8 (Mus musculus) Go to UniProtKB:  Q9Z2X8

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Nrf2/Neh2 peptide from Nuclear factor erythroid 2-related factor 2	B	15	Mus musculus	Mutation(s): 0  Gene Names: Nfe2l2 (Nrf-2, Nrf2)
Find proteins for Q60795 (Mus musculus) Go to UniProtKB:  Q60795

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

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 = 103.131	α = 90.00
b = 103.131	β = 90.00
c = 56.141	γ = 120.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
REFMAC	refinement
DNA	data collection
MOLREP	phasing
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-09-14 
• Released Date: 2007-09-04 
• Deposition Author(s): Padmanabhan, B., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History 

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