5FNQ

Structure of the Keap1 Kelch domain in complex with a small molecule inhibitor.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Mono-Acidic Inhibitors of the Kelch-Like Ech-Associated Protein 1 : Nuclear Factor Erythroid 2-Related Factor 2 (Keap1:Nrf2) Protein-Protein Interaction with High Cell Potency Identified by Fragment-Based Discovery.

Davies, T.G.Wixted, W.E.Coyle, J.E.Griffiths-Jones, C.Hearn, K.Mcmenamin, R.L.Norton, D.Rich, S.J.Richardson, C.Saxty, G.Willems, H.M.G.Woolford, A.J.Cottom, J.E.Kou, J.Yonchuk, J.G.Feldser, H.G.Sanchez, Y.Foley, J.P.Bolognese, B.J.Logan, G.A.Podolin, P.L.Yan, H.Callahan, J.F.Heightman, T.D.Kerns, J.K.

(2016) J.Med.Chem. 59: 3991

  • DOI: 10.1021/acs.jmedchem.6b00228
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • KEAP1 is the key regulator of the NRF2-mediated cytoprotective response, and increasingly recognized as a target for diseases involving oxidative stress. Pharmacological intervention has focused on molecules that decrease NRF2-ubiquitination through ...

    KEAP1 is the key regulator of the NRF2-mediated cytoprotective response, and increasingly recognized as a target for diseases involving oxidative stress. Pharmacological intervention has focused on molecules that decrease NRF2-ubiquitination through covalent modification of KEAP1 cysteine residues, but such electrophilic compounds lack selectivity and may be associated with off-target toxicity. We report here the first use of a fragment-based approach to directly target the KEAP1 Kelch-NRF2 interaction. X-ray crystallographic screening identified three distinct "hot-spots" for fragment binding within the NRF2 binding pocket of KEAP1, allowing progression of a weak fragment hit to molecules with nanomolar affinity for KEAP1 while maintaining drug-like properties. This work resulted in a promising lead compound which exhibits tight and selective binding to KEAP1, and activates the NRF2 antioxidant response in cellular and in vivo models, thereby providing a high quality chemical probe to explore the therapeutic potential of disrupting the KEAP1-NRF2 interaction.


    Organizational Affiliation

    Astex Pharmaceuticals, 436 Cambridge Science Park, Cambridge CB4 0QA, U.K.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KELCH-LIKE ECH-ASSOCIATED PROTEIN 1
A
304Mus musculusMutation(s): 0 
Gene Names: Keap1 (Inrf2, Kiaa0132)
Find proteins for Q9Z2X8 (Mus musculus)
Go to UniProtKB:  Q9Z2X8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
S0W
Query on S0W

Download SDF File 
Download CCD File 
A
3-(4-CHLOROPHENYL)PROPANOIC ACID
C9 H9 Cl O2
BBSLOKZINKEUCR-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.178 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 103.625α = 90.00
b = 103.625β = 90.00
c = 56.027γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2016-04-13
    Type: Initial release
  • Version 1.1: 2016-05-18
    Type: Database references
  • Version 2.0: 2018-04-04
    Type: Atomic model, Data collection