7NEC

ROR(gamma)t ligand binding domain in complex with allosteric ligand FM217


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structure-Activity Relationship Studies of Trisubstituted Isoxazoles as Selective Allosteric Ligands for the Retinoic-Acid-Receptor-Related Orphan Receptor gamma t.

Meijer, F.A.Saris, A.O.W.M.Doveston, R.G.Oerlemans, G.J.M.de Vries, R.M.J.M.Somsen, B.A.Unger, A.Klebl, B.Ottmann, C.Cossar, P.J.Brunsveld, L.

(2021) J Med Chem 64: 9238-9258

  • DOI: https://doi.org/10.1021/acs.jmedchem.1c00475
  • Primary Citation of Related Structures:  
    7NEC, 7NP5, 7NP6, 7NPC

  • PubMed Abstract: 

    The inhibition of the nuclear receptor retinoic-acid-receptor-related orphan receptor γt (RORγt) is a promising strategy in the treatment of autoimmune diseases. RORγt features an allosteric binding site within its ligand-binding domain that provides an opportunity to overcome drawbacks associated with orthosteric modulators. Recently, trisubstituted isoxazoles were identified as a novel class of allosteric RORγt inverse agonists. This chemotype offers new opportunities for optimization into selective and efficacious allosteric drug-like molecules. Here, we explore the structure-activity relationship profile of the isoxazole series utilizing a combination of structure-based design, X-ray crystallography, and biochemical assays. The initial lead isoxazole ( FM26 ) was optimized, resulting in compounds with a ∼10-fold increase in potency (low nM), significant cellular activity, promising pharmacokinetic properties, and a good selectivity profile over the peroxisome-proliferated-activated receptor γ and the farnesoid X receptor. We envisage that this work will serve as a platform for the accelerated development of isoxazoles and other novel chemotypes for the effective allosteric targeting of RORγt.


  • Organizational Affiliation

    Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nuclear receptor ROR-gamma247Homo sapiensMutation(s): 1 
Gene Names: RORCNR1F3RORGRZRG
UniProt & NIH Common Fund Data Resources
Find proteins for P51449 (Homo sapiens)
Explore P51449 
Go to UniProtKB:  P51449
PHAROS:  P51449
GTEx:  ENSG00000143365 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51449
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
U95 (Subject of Investigation/LOI)
Query on U95

Download Ideal Coordinates CCD File 
B [auth A]4-[[3-[2-chloranyl-6-(trifluoromethyl)phenyl]-5-(1~{H}-pyrrol-2-yl)-1,2-oxazol-4-yl]methoxy]benzoic acid
C22 H14 Cl F3 N2 O4
RSKUYRRDRPIYIT-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
U95 BindingDB:  7NEC IC50: min: 46, max: 140 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.346α = 90
b = 108.346β = 90
c = 99.447γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
Aimlessdata scaling
REFMACrefinement
Cootmodel building
DIALSdata reduction
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Netherlands Organisation for Scientific Research (NWO)Netherlands024.001.035
Netherlands Organisation for Scientific Research (NWO)Netherlands016.150.366
Netherlands Organisation for Scientific Research (NWO)Netherlands711.017.014
European Union (EU)Netherlands705188

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-02
    Type: Initial release
  • Version 1.1: 2021-07-21
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Database references, Refinement description