5WBE

COX-1:MOFEZOLAC COMPLEX STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Structural basis for selective inhibition of Cyclooxygenase-1 (COX-1) by diarylisoxazoles mofezolac and 3-(5-chlorofuran-2-yl)-5-methyl-4-phenylisoxazole (P6).

Cingolani, G.Panella, A.Perrone, M.G.Vitale, P.Di Mauro, G.Fortuna, C.G.Armen, R.S.Ferorelli, S.Smith, W.L.Scilimati, A.

(2017) Eur J Med Chem 138: 661-668

  • DOI: https://doi.org/10.1016/j.ejmech.2017.06.045
  • Primary Citation of Related Structures:  
    5U6X, 5WBE

  • PubMed Abstract: 

    The diarylisoxazole molecular scaffold is found in several NSAIDs, especially those with high selectivity for COX-1. Here, we have determined the structural basis for COX-1 binding to two diarylisoxazoles: mofezolac, which is polar and ionizable, and 3-(5-chlorofuran-2-yl)-5-methyl-4-phenylisoxazole (P6) that has very low polarity. X-ray analysis of the crystal structures of COX-1 bound to mofezolac and 3-(5-chlorofuran-2-yl)-5-methyl-4-phenylisoxazole allowed the identification of specific binding determinants within the enzyme active site, relevant to generate structure/activity relationships for diarylisoxazole NSAIDs.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA; Institute of Biomembranes and Bioenergetics, National Research Council, Via Amendola 165/A, 70125 Bari, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Prostaglandin G/H synthase 1
A, B
600Ovis ariesMutation(s): 0 
Gene Names: PTGS1COX1
EC: 1.14.99.1
UniProt
Find proteins for P05979 (Ovis aries)
Explore P05979 
Go to UniProtKB:  P05979
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05979
Glycosylation
Glycosylation Sites: 3
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, E, F, H
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D, G
5N-Glycosylation
Glycosylation Resources
GlyTouCan:  G27747YT
GlyCosmos:  G27747YT
GlyGen:  G27747YT
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
I [auth A],
L [auth B]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
63X (Subject of Investigation/LOI)
Query on 63X

Download Ideal Coordinates CCD File 
K [auth A],
M [auth B]
Mofezolac
C19 H17 N O5
DJEIHHYCDCTAAH-UHFFFAOYSA-N
BOG (Subject of Investigation/LOI)
Query on BOG

Download Ideal Coordinates CCD File 
J [auth A],
N [auth B],
O [auth B]
octyl beta-D-glucopyranoside
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
63X BindingDB:  5WBE IC50: min: 1.4, max: 13 (nM) from 5 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 180.925α = 90
b = 180.925β = 90
c = 104.248γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-10-04
    Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary