5KIR

The Structure of Vioxx Bound to Human COX-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Crystal structure of rofecoxib bound to human cyclooxygenase-2.

Orlando, B.J.Malkowski, M.G.

(2016) Acta Crystallogr F Struct Biol Commun 72: 772-776

  • DOI: https://doi.org/10.1107/S2053230X16014230
  • Primary Citation of Related Structures:  
    5KIR

  • PubMed Abstract: 

    Rofecoxib (Vioxx) was one of the first selective cyclooxygenase-2 (COX-2) inhibitors (coxibs) to be approved for use in humans. Within five years after its release to the public, Vioxx was withdrawn from the market owing to the adverse cardiovascular effects of the drug. Despite the widespread knowledge of the development and withdrawal of Vioxx, relatively little is known at the molecular level about how the inhibitor binds to COX-2. Vioxx is unique in that the inhibitor contains a methyl sulfone moiety in place of the sulfonamide moiety found in other coxibs such as celecoxib and valdecoxib. Here, new crystallization conditions were identified that allowed the structural determination of human COX-2 in complex with Vioxx and the structure was subsequently determined to 2.7 Å resolution. The crystal structure provides the first atomic level details of the binding of Vioxx to COX-2. As anticipated, Vioxx binds with its methyl sulfone moiety located in the side pocket of the cyclooxygenase channel, providing support for the isoform selectivity of this drug.


  • Organizational Affiliation

    Department of Structural Biology, The State University of New York at Buffalo and the Hauptman-Woodward Medical Research Institute, 700 Ellicott Street, Buffalo, NY 14203, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Prostaglandin G/H synthase 2
A, B
551Homo sapiensMutation(s): 0 
Gene Names: PTGS2COX2
EC: 1.14.99.1
UniProt & NIH Common Fund Data Resources
Find proteins for P35354 (Homo sapiens)
Explore P35354 
Go to UniProtKB:  P35354
PHAROS:  P35354
GTEx:  ENSG00000073756 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35354
Glycosylation
Glycosylation Sites: 2Go to GlyGen: P35354-1
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G62182OO
GlyCosmos:  G62182OO
GlyGen:  G62182OO
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
COH
Query on COH

Download Ideal Coordinates CCD File 
F [auth A],
N [auth B]
PROTOPORPHYRIN IX CONTAINING CO
C34 H32 Co N4 O4
AQTFKGDWFRRIHR-RGGAHWMASA-L
RCX
Query on RCX

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E [auth A],
M [auth B]
Rofecoxib
C17 H14 O4 S
RZJQGNCSTQAWON-UHFFFAOYSA-N
NAG
Query on NAG

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G [auth A],
O [auth B]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
PO4
Query on PO4

Download Ideal Coordinates CCD File 
J [auth A]
K [auth A]
L [auth A]
Q [auth B]
R [auth B]
J [auth A],
K [auth A],
L [auth A],
Q [auth B],
R [auth B],
S [auth B]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
GOL
Query on GOL

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I [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
NH4
Query on NH4

Download Ideal Coordinates CCD File 
H [auth A],
P [auth B]
AMMONIUM ION
H4 N
QGZKDVFQNNGYKY-UHFFFAOYSA-O
Binding Affinity Annotations 
IDSourceBinding Affinity
RCX BindingDB:  5KIR Ki: min: 310, max: 840 (nM) from 5 assay(s)
IC50: min: 1, max: 3400 (nM) from 45 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.989α = 90
b = 149.422β = 90
c = 185.055γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM 115386

Revision History  (Full details and data files)

  • Version 1.0: 2016-09-28
    Type: Initial release
  • Version 1.1: 2016-10-19
    Changes: Database references
  • Version 1.2: 2017-09-27
    Changes: Author supporting evidence, Derived calculations
  • Version 1.3: 2019-12-25
    Changes: Author supporting evidence
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-09-27
    Changes: Data collection, Database references, Refinement description, Structure summary