Cycle Network Model of Prostaglandin H Synthase-1
نویسندگان
چکیده
منابع مشابه
Heme coordination of prostaglandin H synthase.
The heme coordination of ovine prostaglandin H synthase (PGHS) has been characterized by EPR, magnetic circular dichroism, resonance Raman, and optical spectroscopies. The EPR spectrum of ferric PGHS is consistent with an equilibrium mixture of high-spin and low-spin heme species. Both species disappear on reaction of the synthase with hydroperoxides. The high-spin to low-spin interconversion i...
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Prostaglandin H synthase (PGHS) is a rate-limiting enzyme in the production of prostaglandins and thromboxane, which are important regulators of vascular function. Under normal physiological conditions, PGHS-dependent vasodilators (such as prostacyclin) modulate vascular tone. However, PGHS-dependent vasoconstriction (mediated by thromboxane and/or its immediate precursor, PGH(2)) predominates ...
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COX2 is an enzyme that belongs to the prostaglandin G/H synthase family. It consists of 604 amino acids and has a molecular weight of 68996 Da. COX2 possesses two catalytic activities and respective active sites: a cyclooxygenase (COX) that converts arachidonic acid to a prostaglandin endoperoxide, prostaglandin G2 (PGG2), and; a peroxidase (POX) that reduces PGG2 to PGH2. COX2 functions as hom...
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The metabolism of aromatic amines by the peroxidase activity of prostaglandin H synthase (PHS) has been studied in this laboratory by use of two model compounds, the carcinogenic primary amine 2-aminofluorene (2-AF) and the substituted amine aminopyrine (AP). 2-AF is oxidized by PHS to 2, 2-azobisfluorene, 2-aminodifluorenylamine, 2-nitrofluorene, polymeric material, and products covalently bou...
متن کاملCrystallization of prostaglandin-H synthase for X-ray structure analysis.
Prostaglandin-H (PGH) synthase from ram seminal vesicles is a dimeric integral membrane protein of molecular weight 140 kDa. PGH synthase is a key enzyme in the biosynthesis of prostaglandins, has cyclooxygenase and peroxidase activities, and contains heme as a coenzyme. In the peroxidation step of its reaction. PGH synthase can use xenobiotics as co-substrates and can catalyze the metabolic ac...
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ژورنال
عنوان ژورنال: Pharmaceuticals
سال: 2020
ISSN: 1424-8247
DOI: 10.3390/ph13100265