Primary Citation of Related Structures: 1PRH, 1CQE
PubMed Abstract:
The three-dimensional structure of prostaglandin H2 synthase-1, an integral membrane protein, has been determined at 3.5 A resolution by X-ray crystallography. This bifunctional enzyme comprises three independent folding units: an epidermal growth factor domain, a membrane-binding motif and an enzymatic domain ...
The three-dimensional structure of prostaglandin H2 synthase-1, an integral membrane protein, has been determined at 3.5 A resolution by X-ray crystallography. This bifunctional enzyme comprises three independent folding units: an epidermal growth factor domain, a membrane-binding motif and an enzymatic domain. Two adjacent but spatially distinct active sites were found for its haem-dependent peroxidase and cyclooxygenase activities. The cyclooxygenase active site is created by a long, hydrophobic channel that is the site of non-steroidal anti-inflammatory drug binding. The conformation of the membrane-binding motif strongly suggests that the enzyme integrates into only one leaflet of the lipid bilayer and is thus a monotopic membrane protein.
Related Citations:
Synthesis and Use of Iodinated Nonsteroidal Antiinflammatory Drug Analogs as Crystallographic Probes of the Prostaglandin H2 Synthase Cyclooxygenase Active Site Loll, P.J., Picot, D., Ekabo, O., Garavito, R.M. (1996) Biochemistry 35: 7330
The Structural Basis of Aspirin Activity Inferred from the Crystal Structure of Inactivated Prostaglandin H2 Synthase Loll, P.J., Picot, D., Garavito, R.M. (1995) Nat Struct Biol 2: 637
X-Ray Crystal Structure of Canine Myeloperoxidase at 3 Angstroms Resolution Zeng, J., Fenna, R.E. (1992) J Mol Biol 226: 185
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, University of Chicago, Illinois 60637.
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