KEGG   ENZYME: 5.3.99.4Help
Entry
EC 5.3.99.4                 Enzyme                                 

Name prostaglandin-I synthase;
prostacyclin synthase;
prostacycline synthetase;
prostagladin I2 synthetase;
PGI2 synthase;
PGI2 synthetase
Class Isomerases;
Intramolecular oxidoreductases;
Other intramolecular oxidoreductases
BRITE hierarchy
Sysname (5Z,13E)-(15S)-9alpha,11alpha-epidioxy-15-hydroxyprosta-5,13-dienoat
e 6-isomerase
Reaction(IUBMB) (5Z,13E)-(15S)-9alpha,11alpha-epidioxy-15-hydroxyprosta-5,13-
dienoate =
(5Z,13E)-(15S)-6,9alpha-epoxy-11alpha,15-dihydroxyprosta-5,13-
dienoate [RN:R02267]
Reaction(KEGG) R02267
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Substrate (5Z,13E)-(15S)-9alpha,11alpha-epidioxy-15-hydroxyprosta-5,13-
dienoate [CPD:C00427]
Product (5Z,13E)-(15S)-6,9alpha-epoxy-11alpha,15-dihydroxyprosta-5,13-
dienoate [CPD:C01312]
Cofactor Heme [CPD:C00032]
Comment Converts prostaglandin H2 into prostaglandin I2 (prostacyclin). A
heme-thiolate protein.
Pathway PATH: ec00590  Arachidonic acid metabolism
PATH: ec01100  Metabolic pathways
Orthology KO: K01831  cytochrome P450, family 8, subfamily A (Prostacyclin
            synthase)
Genes HSA: 5740(PTGIS)
PTR: 458323(PTGIS)
MCC: 703407(PTGIS)
MMU: 19223(Ptgis)
RNO: 25527(Ptgis)
CFA: 485919(PTGIS)
BTA: 282021(PTGIS)
ECB: 100071412
MDO: 100029131
OAA: 100076102
DRE: 559148(ptgisl)
Taxonomy
Structures PDB: 2IAG  3B6H  3B98  3B99  
Reference
  Authors
  Title


  Journal
  Organism
1  [PMID:6338016]
DeWitt DL, Smith WL.
Purification of prostacyclin synthase from bovine aorta by
immunoaffinity  chromatography. Evidence that the enzyme is a
hemoprotein.
J. Biol. Chem. 258 (1983) 3285-93.
Bos taurus [GN:bta]
Reference
  Authors
  Title

  Journal
  Organism
2  [PMID:7023490]
Ullrich V, Castle L, Weber P.
Spectral evidence for the cytochrome P450 nature of prostacyclin
synthetase.
Biochem. Pharmacol. 30 (1981) 2033-6.
Sus scofa [GN:ssc]
Other DBs ExplorEnz - The Enzyme Database: 5.3.99.4
IUBMB Enzyme Nomenclature: 5.3.99.4
ExPASy - ENZYME nomenclature database: 5.3.99.4
BRENDA, the Enzyme Database: 5.3.99.4
CAS: 65802-86-0

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