6FMP

Keap1 - peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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: 10.1002/cbic.201800170
  • Primary Citation of Related Structures:  

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kelch-like ECH-associated protein 1
A, B
414Homo sapiensMutation(s): 0 
Gene Names: KEAP1 (INRF2, KIAA0132, KLHL19)
Find proteins for Q14145 (Homo sapiens)
Go to Gene View: KEAP1
Go to UniProtKB:  Q14145
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ACY-ASP-GLU-GLU-THR-GLY-GLU-PHE
C
8N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
B, C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACY
Query on ACY
C
NON-POLYMERC2 H4 O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 76.409α = 90.00
b = 76.259β = 90.00
c = 208.284γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
UCL Secondment MRC PtDUnited Kingdom530912

Revision History 

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2018-09-12
    Type: Data collection, Database references