Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 138090.14 
• Atom Count: 9168 
• Residue Count: 1174 
• Unique protein chains: 1

6COX

CYCLOOXYGENASE-2 (PROSTAGLANDIN SYNTHASE-2) COMPLEXED WITH A SELECTIVE INHIBITOR, SC-558 IN I222 SPACE GROUP

• DOI: 10.2210/pdb6COX/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mus musculus
• Expression System: Spodoptera frugiperda


• Deposited: 1996-12-18 Released: 1997-12-24 
• Deposition Author(s): Kurumbail, R., Stallings, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.220 

Literature

Structural basis for selective inhibition of cyclooxygenase-2 by anti-inflammatory agents.

Kurumbail, R.G., Stevens, A.M., Gierse, J.K., McDonald, J.J., Stegeman, R.A., Pak, J.Y., Gildehaus, D., Miyashiro, J.M., Penning, T.D., Seibert, K., Isakson, P.C., Stallings, W.C.

(1996) Nature 384: 644-648

• PubMed: 8967954 
• DOI: 10.1038/384644a0
• Primary Citation of Related Structures:  
  5COX, 4COX, 3PGH, 1CX2


• PubMed Abstract: 
  

Prostaglandins and glucocorticoids are potent mediators of inflammation. Non-steroidal anti-inflammatory drugs (NSAIDs) exert their effects by inhibition of prostaglandin production. The pharmacological target of NSAIDs is cyclooxygenase (COX, also known as PGH synthase), which catalyses the first committed step in arachidonic-acid metabolism. Two isoforms of the membrane protein COX are known: COX-1, which is constitutively expressed in most tissues, is responsible for the physiological production of prostaglandins; and COX-2, which is induced by cytokines, mitogens and endotoxins in inflammatory cells, is responsible for the elevated production of prostaglandins during inflammation. The structure of ovine COX-1 complexed with several NSAIDs has been determined. Here we report the structures of unliganded murine COX-2 and complexes with flurbiprofen, indomethacin and SC-558, a selective COX-2 inhibitor, determined at 3.0 to 2.5 A resolution. These structures explain the structural basis for the selective inhibition of COX-2, and demonstrate some of the conformational changes associated with time-dependent inhibition.

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Related Citations: 

• Erratum. Structural Basis for Selective Inhibition of Cyclooxygenase-2 by Anti-Inflammatory Agents
  Kurumbail, R.G.,Stevens, A.M.,Gierse, J.K.,Mcdonald, J.J.,Stegeman, R.A.,Pak, J.Y.,Gildehaus, D.,Miyashiro, J.M.,Penning, T.D.,Seibert, K.,Isakson, P.C.,Stallings, W.C.
  (1997) Nature 385: 555




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Organizational Affiliation: 

G.D. Searle, St Louis, Missouri 63198, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CYCLOOXYGENASE-2	A, B	587	Mus musculus	Mutation(s): 0  Gene Names: Ptgs2 (Cox-2, Cox2, Pghs-b, Tis10) EC: 1.14.99.1
Find proteins for Q05769 (Mus musculus) Go to UniProtKB:  Q05769

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
S58	A, B	1-PHENYLSULFONAMIDE-3-TRIFLUOROMETHYL-5-PARABROMOPHENYLPYRAZOLE C16 H11 Br F3 N3 O2 S OYZKFVIVPRQRQQ-UHFFFAOYSA-N
HEM	A, B	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
NAG	A, B	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
S58	IC50: 50 nM (87) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.220 
• Space Group: I 2 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 181.170	α = 90.00
b = 132.810	β = 90.00
c = 122.740	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
X-PLOR	refinement
SCALEPACK	data scaling
MERLOT	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-12-18 
• Released Date: 1997-12-24 
• Deposition Author(s): Kurumbail, R., Stallings, W.

Revision History 

• Version 1.0: 1997-12-24
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Non-polymer description, Version format compliance