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2FLU|pdb_00002flu
Crystal Structure of the Kelch-Neh2 Complex
- PDB DOI: https://doi.org/10.2210/pdb2FLU/pdb
- Classification: LIGASE
- Organism(s): Homo sapiens
- Expression System: Escherichia coli
- Mutation(s): No
- Deposited: 2006-01-06 Released: 2006-08-15
- Deposition Author(s): Li, X.,Lo, J.,Beamer, L.,Hannink, M.
Experimental Data Snapshot
- Method: X-RAY DIFFRACTION
- Resolution: 1.50 Å
- R-Value Free: 0.199 (Depositor), 0.190 (DCC)
- R-Value Work: 0.179 (Depositor), 0.180 (DCC)
- R-Value Observed: 0.180 (Depositor)
Starting Model:experimental
View more details
wwPDB Validation 3D Report Full Report
Download MendeleyStructure 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
- PubMed: 16888629 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.1038/sj.emboj.7601243
- Primary Citation of Related Structures:
2FLU - 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 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.
- Department of Biochemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.
Organizational Affiliation:
Explore in 3D: Structure |Sequence Annotations |Electron Density |Validation Report
Global Symmetry: Asymmetric - C1
Global Stoichiometry: Hetero 2-mer - A1B1
Find Similar Assemblies
Biological assembly 1 assigned by authors.
Macromolecule Content
- Total Structure Weight: 35.55 kDa
- Atom Count: 2,728
- Modeled Residue Count: 301
- Deposited Residue Count: 324
- Unique protein chains: 2
Entity ID: 1 | |||||
|---|---|---|---|---|---|
| Molecule | Chains | Sequence Length | Organism | Details | Image |
| Kelch-like ECH-associated protein 1 | A [auth X] | 308 | Homo sapiens | Mutation(s): 0 |  |
UniProt & NIH Common Fund Data Resources | |||||
Find proteins for Q14145 (Homo sapiens) Explore Q14145 Go to UniProtKB: Q14145 | |||||
PHAROS: Q14145 GTEx: ENSG00000079999 | |||||
Entity Groups | |||||
| Sequence Clusters | 30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity | ||||
| UniProt Group | Q14145 | ||||
Sequence AnnotationsExpand | |||||
| |||||
Find similar proteins by: Sequence | 3D Structure
Entity ID: 2 | |||||
|---|---|---|---|---|---|
| Molecule | Chains | Sequence Length | Organism | Details | Image |
| Nrf2 | B [auth P] | 16 | N/A | Mutation(s): 0 |  |
UniProt & NIH Common Fund Data Resources | |||||
Find proteins for Q16236 (Homo sapiens) Explore Q16236 Go to UniProtKB: Q16236 | |||||
PHAROS: Q16236 GTEx: ENSG00000116044 | |||||
Entity Groups | |||||
| Sequence Clusters | 30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity | ||||
| UniProt Group | Q16236 | ||||
Sequence AnnotationsExpand | |||||
| |||||
Experimental Data
- Method: X-RAY DIFFRACTION
- Resolution: 1.50 Å
- R-Value Free: 0.199 (Depositor), 0.190 (DCC)
- R-Value Work: 0.179 (Depositor), 0.180 (DCC)
- R-Value Observed: 0.180 (Depositor)
| Length ( Å ) | Angle ( ˚ ) |
|---|---|
| a = 76.757 | α = 90 |
| b = 92.069 | β = 90 |
| c = 46.314 | γ = 90 |
| Software Name | Purpose |
|---|---|
| REFMAC | refinement |
| d*TREK | data scaling |
| MOLREP | phasing |
Deposition Data
- Released Date: 2006-08-15 Deposition Author(s): Li, X.,Lo, J.,Beamer, L.,Hannink, M.
Revision History (Full details and data files)
- Version 1.0: 2006-08-15
Type: Initial release - Version 1.1: 2008-05-01
Changes: Version format compliance - Version 1.2: 2011-07-13
Changes: Advisory, Version format compliance - Version 1.3: 2023-08-30
Changes: Data collection, Database references, Refinement description - Version 1.4: 2024-10-30
Changes: Structure summary
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RCSB PDB Core Operations are funded by theU.S. National Science Foundation (DBI-2321666), theUS Department of Energy (DE-SC0019749), and theNational Cancer Institute,National Institute of Allergy and Infectious Diseases, andNational Institute of General Medical Sciences of theNational Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.