Record Information |
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Version | 5.0 |
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Status | Predicted |
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Creation Date | 2021-09-13 06:23:46 UTC |
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Update Date | 2022-11-30 20:00:54 UTC |
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HMDB ID | HMDB0276779 |
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Secondary Accession Numbers | None |
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Metabolite Identification |
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Common Name | PI(18:3(6Z,9Z,12Z)/PGE2) |
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Description | PI(18:3(6Z,9Z,12Z)/PGE2) is an oxidized phosphatidylinositol (PI). Phosphatidylinositols are important lipids, both as a key membrane constituent and as a participant in essential metabolic processes, both directly and via a number of metabolites. Phosphatidylinositols are acidic (anionic) phospholipids that consist of a phosphatidic acid backbone, linked via the phosphate group to inositol (hexahydroxycyclohexane). Phosphatidylinositols can have many different combinations of fatty acids of varying lengths and saturation attached at the C-1 and C-2 positions. PI(18:3(6Z,9Z,12Z)/PGE2), in particular, consists of one chain of 6Z,9Z,12Z-octadecatrienoyl at the C-1 position and one chain of Prostaglandin E2 at the C-2 position. The inositol group that is part of every phosphatidylinositol lipid is covalently linked to the phosphate group that acts as a bridge to the lipid tail. In most organisms, the stereochemical form of this inositol is myo-D-inositol (with one axial hydroxyl in position 2 with the remainder equatorial), although other forms can be found in certain plant phosphatidylinositols. Phosphatidylinositol is especially abundant in brain tissue, where it can amount to 10% of the phospholipids, but it is present in all tissues and cell types. There is usually less of it than of phosphatidylcholine, phosphatidylethanolamine and phosphatidylserine. In animal tissues, phosphatidylinositol is the primary source of the arachidonic acid required for biosynthesis of eicosanoids, including prostaglandins, via the action of the enzyme phospholipase A2. Phosphatidylinositol can be phosphorylated by a number of different kinases that place the phosphate moiety on positions 4 and 5 of the inositol ring, although position 3 can also be phosphorylated by a specific kinase. Seven different isomers are known, but the most important in both quantitative and biological terms are phosphatidylinositol 4-phosphate and phosphatidylinositol 4,5-bisphosphate. Phosphatidylinositol and the phosphatidylinositol phosphates are the main source of diacylglycerols that serve as signaling molecules, via the action of phospholipase C enzymes. While most phospholipids have a saturated fatty acid on C-1 and an unsaturated fatty acid on C-2 of the glycerol backbone, the fatty acid distribution at the C-1 and C-2 positions of glycerol within phospholipids is continually in flux, owing to phospholipid degradation and the continuous phospholipid remodeling that occurs while these molecules are in membranes. PIs composed exclusively of non-phosphorylated inositol exhibit a net charge of -1 at physiological pH. Molecules with phosphorylated inositol (such as PIP, PIP2, PIP3, etc.) are termed polyphosphoinositides. The polyphosphoinositides are important intracellular transducers of signals emanating from the plasma membrane. The synthesis of PI involves CDP-activated 1,2-diacylglycerol condensation with myo-inositol. |
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Structure | CCCCC\C=C/C\C=C/C\C=C/CCCCC(=O)OC[C@@H]1COP(O)(=O)O[C@H]2[C@H](O)[C@@H](O)[C@H](O)[C@@H](C\C=C/CCCC(=O)O1)C(=O)C[C@@H](O)[C@H](\C=C\[C@@H](O)CCCCC)[C@@H](O)[C@H]2O InChI=1S/C47H77O16P/c1-3-5-7-8-9-10-11-12-13-14-15-16-17-18-23-27-40(51)60-32-35-33-61-64(58,59)63-47-45(56)43(54)37(30-29-34(48)25-21-6-4-2)39(50)31-38(49)36(42(53)44(55)46(47)57)26-22-19-20-24-28-41(52)62-35/h9-10,12-13,15-16,19,22,29-30,34-37,39,42-48,50,53-57H,3-8,11,14,17-18,20-21,23-28,31-33H2,1-2H3,(H,58,59)/b10-9-,13-12-,16-15-,22-19-,30-29+/t34-,35+,36-,37-,39+,42+,43+,44-,45+,46+,47+/m0/s1 |
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Synonyms | Value | Source |
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[(1R,6R,12Z,15R,18R,19S,20R,21R,22R,23S,24R)-3,18,20,21,22,23,24-Heptahydroxy-19-[(1E,3S)-3-hydroxyoct-1-en-1-yl]-3,8,16-trioxo-2,4,7-trioxa-3-phosphabicyclo[13.6.3]tetracos-12-en-6-yl]methyl (6Z,9Z,12Z)-octadeca-6,9,12-trienoic acid | HMDB |
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Chemical Formula | C47H77O16P |
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Average Molecular Weight | 929.091 |
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Monoisotopic Molecular Weight | 928.494923397 |
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IUPAC Name | [(1R,6R,12Z,15R,18R,19S,20R,21R,22R,23S,24R)-3,18,20,21,22,23,24-heptahydroxy-19-[(1E,3S)-3-hydroxyoct-1-en-1-yl]-3,8,16-trioxo-2,4,7-trioxa-3lambda5-phosphabicyclo[13.6.3]tetracos-12-en-6-yl]methyl (6Z,9Z,12Z)-octadeca-6,9,12-trienoate |
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Traditional Name | [(1R,6R,12Z,15R,18R,19S,20R,21R,22R,23S,24R)-3,18,20,21,22,23,24-heptahydroxy-19-[(1E,3S)-3-hydroxyoct-1-en-1-yl]-3,8,16-trioxo-2,4,7-trioxa-3lambda5-phosphabicyclo[13.6.3]tetracos-12-en-6-yl]methyl (6Z,9Z,12Z)-octadeca-6,9,12-trienoate |
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CAS Registry Number | Not Available |
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SMILES | CCCCC\C=C/C\C=C/C\C=C/CCCCC(=O)OC[C@@H]1COP(O)(=O)O[C@H]2[C@H](O)[C@@H](O)[C@H](O)[C@@H](C\C=C/CCCC(=O)O1)C(=O)C[C@@H](O)[C@H](\C=C\[C@@H](O)CCCCC)[C@@H](O)[C@H]2O |
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InChI Identifier | InChI=1S/C47H77O16P/c1-3-5-7-8-9-10-11-12-13-14-15-16-17-18-23-27-40(51)60-32-35-33-61-64(58,59)63-47-45(56)43(54)37(30-29-34(48)25-21-6-4-2)39(50)31-38(49)36(42(53)44(55)46(47)57)26-22-19-20-24-28-41(52)62-35/h9-10,12-13,15-16,19,22,29-30,34-37,39,42-48,50,53-57H,3-8,11,14,17-18,20-21,23-28,31-33H2,1-2H3,(H,58,59)/b10-9-,13-12-,16-15-,22-19-,30-29+/t34-,35+,36-,37-,39+,42+,43+,44-,45+,46+,47+/m0/s1 |
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InChI Key | XBVMAPFCARIVAP-HGWYJPIFSA-N |
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Chemical Taxonomy |
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Description | Belongs to the class of organic compounds known as lineolic acids and derivatives. These are derivatives of lineolic acid. Lineolic acid is a polyunsaturated omega-6 18 carbon long fatty acid, with two CC double bonds at the 9- and 12-positions. |
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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 | Lineolic acids and derivatives |
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Direct Parent | Lineolic acids and derivatives |
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Alternative Parents | |
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Substituents | - Octadecanoid
- Glycerophospholipid
- Fatty acid ester
- Organic phosphoric acid derivative
- Dicarboxylic acid or derivatives
- Cyclitol or derivatives
- Secondary alcohol
- Lactone
- Ketone
- Carboxylic acid ester
- Oxacycle
- Organoheterocyclic compound
- Polyol
- Carboxylic acid derivative
- Organic oxygen compound
- Organic oxide
- Hydrocarbon derivative
- Organooxygen compound
- Carbonyl group
- Alcohol
- 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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Physiological effect | |
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Disposition | |
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Process | |
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Role | Not Available |
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Physical Properties |
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State | Not Available |
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Experimental Molecular Properties | Property | Value | Reference |
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Melting Point | Not Available | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | Not Available | Not Available | LogP | Not Available | Not Available |
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Experimental Chromatographic Properties | Not Available |
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Predicted Molecular Properties | |
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Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Kovats Retention IndicesNot Available |
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