5APK

Ligand complex of RORg LBD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Benzoxazepines Achieve Potent Suppression of IL-17 Release in Human T-Helper 17 (TH 17) Cells through an Induced-Fit Binding Mode to the Nuclear Receptor ROR gamma.

Olsson, R.I.Xue, Y.von Berg, S.Aagaard, A.McPheat, J.Hansson, E.L.Bernstrom, J.Hansson, P.Jirholt, J.Grindebacke, H.Leffler, A.Chen, R.Xiong, Y.Ge, H.Hansson, T.G.Narjes, F.

(2016) ChemMedChem 11: 207-216

  • DOI: 10.1002/cmdc.201500432
  • Primary Citation of Related Structures:  
    5APH, 5APK, 5APJ

  • PubMed Abstract: 
  • RORγt, an isoform of the retinoic acid-related orphan receptor gamma (RORc, RORγ), has been identified as the master regulator of T-helper 17 (TH 17) cell function and development, making it an attractive target for the treatment of autoimmune diseases. Validation for this target comes from antibodies targeting interleukin-17 (IL-17), the signature cytokine produced by TH 17 cells, which have shown impressive results in clinical trials ...

    RORγt, an isoform of the retinoic acid-related orphan receptor gamma (RORc, RORγ), has been identified as the master regulator of T-helper 17 (TH 17) cell function and development, making it an attractive target for the treatment of autoimmune diseases. Validation for this target comes from antibodies targeting interleukin-17 (IL-17), the signature cytokine produced by TH 17 cells, which have shown impressive results in clinical trials. Through focused screening of our compound collection, we identified a series of N-sulfonylated benzoxazepines, which displayed micromolar affinity for the RORγ ligand-binding domain (LBD) in a radioligand binding assay. Optimization of these initial hits resulted in potent binders, which dose-dependently decreased the ability of the RORγ-LBD to interact with a peptide derived from steroid receptor coactivator 1, and inhibited the release of IL-17 secretion from isolated and cultured human TH 17 cells with nanomolar potency. A cocrystal structure of inverse agonist 15 (2-chloro-6-fluoro-N-(4-{[3-(trifluoromethyl)phenyl]sulfonyl}-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl)benzamide) bound to the RORγ-LBD illustrated that both hydrophobic interactions, leading to an induced fit around the substituted benzamide moiety of 15, as well as a hydrogen bond from the amide NH to His479 seemed to be important for the mechanism of action. This structure is compared with the structure of agonist 25 (N-(2-fluorophenyl)-4-[(4-fluorophenyl)sulfonyl]-2,3,4,5-tetrahydro-1,4-benzoxazepin-6-amine ) and structures of other known RORγ modulators.


    Organizational Affiliation

    Department of Medicinal Chemistry, AstraZeneca, Respiratory, Inflammation and Autoimmunity iMed, Pepparedsleden 1, 43183, Mölndal, Sweden. Frank.Narjes@astrazeneca.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NUCLEAR RECEPTOR ROR-GAMMA AB265Homo sapiensMutation(s): 0 
Gene Names: RORCNR1F3RORGRZRG
Find proteins for P51449 (Homo sapiens)
Explore P51449 
Go to UniProtKB:  P51449
NIH Common Fund Data Resources
PHAROS:  P51449
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NUCLEAR RECEPTOR ROR-GAMMA D13Homo sapiensMutation(s): 0 
Gene Names: RORCNR1F3RORGRZRG
Find proteins for P51449 (Homo sapiens)
Explore P51449 
Go to UniProtKB:  P51449
NIH Common Fund Data Resources
PHAROS:  P51449
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
76E
Query on 76E

Download Ideal Coordinates CCD File 
A, B
2-CHLORO-6-FLUORO-N-[4-[3-(TRIFLUOROMETHYL)PHENYL]SULFONYL-3,5-DIHYDRO-2H-1,4-BENZOXAZEPIN-7-YL]BENZAMIDE
C23 H17 Cl F4 N2 O4 S
BCCOZQIHZZQJIS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
76EIC50:  40   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.75α = 90
b = 99.75β = 90
c = 129.52γ = 120
Software Package:
Software NamePurpose
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-25
    Type: Initial release
  • Version 1.1: 2016-02-03
    Changes: Database references
  • Version 1.2: 2018-02-14
    Changes: Database references