| Record Information |
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| Version | 1.0 |
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| Creation date | 2011-09-21 00:25:05 UTC |
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| Update date | 2015-07-21 06:57:31 UTC |
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| Primary ID | FDB023127 |
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| Secondary Accession Numbers | Not Available |
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| Chemical Information |
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| FooDB Name | Prostaglandin G2 |
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| Description | Prostaglandin G2 (PGG2) is synthesized from arachidonic acid on a cyclooxygenase (COX) metabolic pathway as a primary step; the COX biosynthesis of prostaglandin (PG) begins with the highly specific oxygenation of arachidonic acid in the 11R configuration and ends with a 15S oxygenation to form PGG2.
The COX site activity that catalyzes the conversion of arachidonic acid to PGG2 is the target for nonsteroidal antiinflammatory drugs (NSAIDs). The peroxidase site activity catalyzes the two-electron reduction of the hydroperoxide bond of PGG2 to yield the corresponding alcohol prostaglandin H2 (PGH2). The formation of a phenoxyl radical on Tyr385 couples the activities of the two sites. The Tyr385 radical is produced via oxidation by compound I, an oxoferryl porphyrin -cation radical, which is generated by reaction of the hemin resting state with PGG2 or other hydroperoxides. The tyrosyl radical homolytically abstracts the 13proS hydrogen atom of arachidonic acid which initiates a radical cascade that ends with the stereoselective formation of PGG2. PGG2 then migrates from the cyclooxygenase (COX) site to the peroxidase (POX) site where it reacts with the hemin group to generate PGH2 and compound I. The heterolytic oxygen-oxygen bond cleavage is assisted by the conserved distal residues His207 and Gln203, mutation of which has been shown to severely impair enzyme activity. Compound I, upon reaction with Tyr385, gives compound II, which in turn is reduced to the hemin resting state by one-electron oxidation of reducing cosubstrates or undergoes reactions that result in enzyme self-inactivation.
Prostaglandin endoperoxide H synthase (PGHS) 1 is a bifunctional membrane enzyme of the endoplasmic reticulum that converts arachidonic acid into prostaglandin H2 (PGH2), the precursor of all prostaglandins, thromboxanes, and prostacyclins. These lipid mediators are intricately involved in normal physiology, namely, in mitogenesis, fever generation, pain response, lymphocyte chemotaxis, fertility, and contradictory stimuli such as vasoconstriction and vasodilatation, as well as platelet aggregation and quiescence. PGHS is implicated in numerous pathologies, including inflammation, cancers of the colon, lung, and breast, Alzheimer's disease, Parkinson's disease, and numerous cardiovascular diseases including atherosclerosis, thrombosis, myocardial infarction, and stroke. (PMID: 14594816, 16552393, 16411757)
Prostaglandins are eicosanoids. The eicosanoids consist of the prostaglandins (PGs), thromboxanes (TXs), leukotrienes (LTs) and lipoxins (LXs). The PGs and TXs are collectively identified as prostanoids. Prostaglandins were originally shown to be synthesized in the prostate gland, thromboxanes from platelets (thrombocytes) and leukotrienes from leukocytes, hence the derivation of their names. All mammalian cells except erythrocytes synthesize eicosanoids. These molecules are extremely potent, able to cause profound physiological effects at very dilute concentrations. All eicosanoids function locally at the site of synthesis, through receptor-mediated G-protein linked signaling pathways. [HMDB] |
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| CAS Number | 51982-36-6 |
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| Structure | |
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| Synonyms | |
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| Predicted Properties | |
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| Chemical Formula | C20H32O6 |
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| IUPAC name | 7-[(1R,4S,5R,6R)-6-[(3S)-3-hydroperoxyoct-1-en-1-yl]-2,3-dioxabicyclo[2.2.1]heptan-5-yl]hept-5-enoic acid |
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| InChI Identifier | InChI=1S/C20H32O6/c1-2-3-6-9-15(24-23)12-13-17-16(18-14-19(17)26-25-18)10-7-4-5-8-11-20(21)22/h4,7,12-13,15-19,23H,2-3,5-6,8-11,14H2,1H3,(H,21,22)/t15-,16+,17+,18-,19+/m0/s1 |
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| InChI Key | SGUKUZOVHSFKPH-BRIYLRKRSA-N |
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| Isomeric SMILES | [H]C(=C[C@@]1([H])[C@@]2([H])C[C@]([H])(OO2)[C@]1([H])CC=CCCCC(O)=O)[C@]([H])(CCCCC)OO |
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| Average Molecular Weight | 368.4645 |
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| Monoisotopic Molecular Weight | 368.219888756 |
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| Classification |
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| Description | Belongs to the class of organic compounds known as prostaglandins and related compounds. These are unsaturated carboxylic acids consisting of a 20 carbon skeleton that also contains a five member ring, and are based upon the fatty acid arachidonic acid. |
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| Kingdom | Organic compounds |
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| Super Class | Lipids and lipid-like molecules |
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| Class | Fatty Acyls |
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| Sub Class | Eicosanoids |
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| Direct Parent | Prostaglandins and related compounds |
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| Alternative Parents | |
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| Substituents | - Prostaglandin skeleton
- Long-chain fatty acid
- Hydroperoxy fatty acid
- Heterocyclic fatty acid
- Fatty acid
- Unsaturated fatty acid
- Ortho-dioxane
- Allylic hydroperoxide
- Ortho-dioxolane
- Dialkyl peroxide
- Hydroperoxide
- Alkyl hydroperoxide
- Oxacycle
- Organoheterocyclic compound
- Peroxol
- Monocarboxylic acid or derivatives
- Carboxylic acid
- Carboxylic acid derivative
- Organic oxygen compound
- Organic oxide
- Hydrocarbon derivative
- Organooxygen compound
- Carbonyl group
- Aliphatic heteropolycyclic compound
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| Molecular Framework | Aliphatic heteropolycyclic compounds |
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| External Descriptors | Not Available |
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| Ontology |
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| Ontology | No ontology term |
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| Physico-Chemical Properties |
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| Physico-Chemical Properties - Experimental | |
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| Spectra |
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| Spectra | Not Available |
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| External Links |
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| ChemSpider ID | 4444406 |
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| ChEMBL ID | Not Available |
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| KEGG Compound ID | C05956 |
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| Pubchem Compound ID | 5280883 |
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| Pubchem Substance ID | Not Available |
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| ChEBI ID | 27647 |
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| Phenol-Explorer ID | Not Available |
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| DrugBank ID | DB03866 |
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| HMDB ID | HMDB03235 |
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| CRC / DFC (Dictionary of Food Compounds) ID | Not Available |
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| EAFUS ID | Not Available |
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| Dr. Duke ID | Not Available |
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| BIGG ID | Not Available |
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| KNApSAcK ID | Not Available |
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| HET ID | PGX |
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| Food Biomarker Ontology | Not Available |
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| VMH ID | Not Available |
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| Flavornet ID | Not Available |
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| GoodScent ID | Not Available |
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| SuperScent ID | Not Available |
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| Wikipedia ID | Not Available |
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| Phenol-Explorer Metabolite ID | Not Available |
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| Duplicate IDS | Not Available |
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| Old DFC IDS | Not Available |
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| Associated Foods |
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| Biological Effects and Interactions |
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| Health Effects / Bioactivities | Not Available |
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| Enzymes | Not Available |
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| Pathways | |
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| Metabolism | Not Available |
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| Biosynthesis | Not Available |
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| Organoleptic Properties |
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| Flavours | Not Available |
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| Files |
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| MSDS | show |
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| References |
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| Synthesis Reference | Not Available |
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| General Reference | Not Available |
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| Content Reference | |
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