Keap1 - peptide complex

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Modified Peptide Inhibitors of the Keap1-Nrf2 Protein-Protein Interaction Incorporating Unnatural Amino Acids.

Georgakopoulos, N.D.Talapatra, S.K.Gatliff, J.Kozielski, F.Wells, G.

(2018) Chembiochem 19: 1810-1816

  • DOI: https://doi.org/10.1002/cbic.201800170
  • Primary Citation of Related Structures:  
    6FMP, 6FMQ

  • PubMed Abstract: 

    Noncovalent inhibitors of the Keap1-Nrf2 protein-protein interaction (PPI) have therapeutic potential in a range of disease states including neurodegenerative diseases (Parkinson's and Alzheimer's diseases), chronic obstructive pulmonary disease and various inflammatory conditions. By stalling Keap1-mediated ubiquitination of Nrf2, such compounds can enhance Nrf2 transcriptional activity and activate the expression of a range of genes with antioxidant response elements in their promoter regions. Keap1 inhibitors based on peptide and small-molecule templates have been identified. In this paper we develop the structure-activity relationships of the peptide series and identify a group of ligands incorporating unnatural amino acids that demonstrate improved binding affinity in fluorescence polarisation, differential scanning fluorimetry and isothermal titration calorimetry assays. These modified peptides have the potential for further development into peptidomimetic chemical probes to explore the role of Nrf2 in disease and as potential lead structures for drug development.

  • Organizational Affiliation

    UCL School of Pharmacy, University College London, 29/39 Brunswick Square, London, WC1N 1AX, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kelch-like ECH-associated protein 1
A, B
414Homo sapiensMutation(s): 0 
Gene Names: KEAP1INRF2KIAA0132KLHL19
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 Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14145
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ACY-SC1-GLU-THR-GLY-GLU-LEUC [auth D]7synthetic constructMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
N [auth B],
O [auth B]
C2 H6 O2
Query on ACT

Download Ideal Coordinates CCD File 
F [auth A]
G [auth A]
H [auth A]
I [auth A]
J [auth A]
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
P [auth B],
Q [auth B]
C2 H3 O2
Query on NA

Download Ideal Coordinates CCD File 
K [auth A]
L [auth A]
M [auth A]
R [auth B]
S [auth B]
K [auth A],
L [auth A],
M [auth A],
R [auth B],
S [auth B],
T [auth B],
U [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.652α = 90
b = 76.129β = 90
c = 211.137γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
UCL Secondment MRC PtDUnited Kingdom530912

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2018-09-12
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description