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

    GlaxoSmithKline Pharmaceuticals, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States.,Astex Pharmaceuticals, 436 Cambridge Science Park, Cambridge CB4 0QA, U.K.,GlaxoSmithKline Pharmaceuticals, 709 Swedeland Road, King of Prussia, Pennsylvania 19406, United States.




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