1CVU image
Entry Detail
PDB ID:
1CVU
Title:
CRYSTAL STRUCTURE OF ARACHIDONIC ACID BOUND TO THE CYCLOOXYGENASE ACTIVE SITE OF COX-2
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
1999-08-24
Release Date:
2000-05-16
Method Details:
Experimental Method:
Resolution:
2.40 Å
R-Value Free:
0.23
R-Value Work:
0.20
Space Group:
I 2 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:PROSTAGLANDIN H2 SYNTHASE-2
Mutations:H207A (COX-1 NUMBERING)
Chain IDs:A, B
Chain Length:552
Number of Molecules:2
Biological Source:Mus musculus
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Primary Citation

Abstact

Cyclooxygenases are bifunctional enzymes that catalyse the first committed step in the synthesis of prostaglandins, thromboxanes and other eicosanoids. The two known cyclooxygenases isoforms share a high degree of amino-acid sequence similarity, structural topology and an identical catalytic mechanism. Cyclooxygenase enzymes catalyse two sequential reactions in spatially distinct, but mechanistically coupled active sites. The initial cyclooxygenase reaction converts arachidonic acid (which is achiral) to prostaglandin G2 (which has five chiral centres). The subsequent peroxidase reaction reduces prostaglandin G2 to prostaglandin H2. Here we report the co-crystal structures of murine apo-cyclooxygenase-2 in complex with arachidonic acid and prostaglandin. These structures suggest the molecular basis for the stereospecificity of prostaglandin G2 synthesis.

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Primary Citation of related structures