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Record Information
Version5.0
StatusPredicted
Creation Date2021-09-13 06:09:09 UTC
Update Date2022-11-30 20:00:51 UTC
HMDB IDHMDB0276676
Secondary Accession NumbersNone
Metabolite Identification
Common NamePI(18:2(9Z,12Z)/PGE2)
DescriptionPI(18:2(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(18:2(9Z,12Z)/PGE2), in particular, consists of one chain of 9Z,12Z-octadecadienoyl 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.
Structure
Thumb
Synonyms
ValueSource
[(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 (12Z)-octadeca-9,12-dienoic acidHMDB
Chemical FormulaC47H79O16P
Average Molecular Weight931.107
Monoisotopic Molecular Weight930.510573462
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 (9Z,12Z)-octadeca-9,12-dienoate
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 (9Z,12Z)-octadeca-9,12-dienoate
CAS Registry NumberNot Available
SMILES
CCCCC\C=C/C\C=C/CCCCCCCC(=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 Identifier
InChI=1S/C47H79O16P/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/h9-10,12-13,19,22,29-30,34-37,39,42-48,50,53-57H,3-8,11,14-18,20-21,23-28,31-33H2,1-2H3,(H,58,59)/b10-9-,13-12-,22-19-,30-29+/t34-,35+,36-,37-,39+,42+,43+,44-,45+,46+,47+/m0/s1
InChI KeyXWNCXLDECIKCAI-HFEIUNDXSA-N
Chemical Taxonomy
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.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassLineolic acids and derivatives
Direct ParentLineolic acids and derivatives
Alternative Parents
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
Molecular FrameworkAliphatic heteropolycyclic compounds
External DescriptorsNot Available
Ontology
Physiological effect
Disposition
Process
RoleNot Available
Physical Properties
StateNot Available
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
logP4.24ALOGPS
logP6.01ChemAxon
logS-4.7ALOGPS
pKa (Strongest Acidic)1.83ChemAxon
pKa (Strongest Basic)-1.6ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count12ChemAxon
Hydrogen Donor Count8ChemAxon
Polar Surface Area267.04 ŲChemAxon
Rotatable Bond Count23ChemAxon
Refractivity244.41 m³·mol⁻¹ChemAxon
Polarizability101.43 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityNoChemAxon
Rule of FiveNoChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
AllCCS[M+H]+298.19932859911
AllCCS[M+H-H2O]+298.55632859911
AllCCS[M+Na]+297.71832859911
AllCCS[M+NH4]+297.83132859911
AllCCS[M-H]-294.5832859911
AllCCS[M+Na-2H]-301.39332859911
AllCCS[M+HCOO]-308.84732859911
DeepCCS[M+H]+304.17330932474
DeepCCS[M-H]-302.4530932474
DeepCCS[M-2H]-336.65330932474
DeepCCS[M+Na]+310.50230932474

Predicted Retention Times

Underivatized

Chromatographic MethodRetention TimeReference
Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. 6.65 minutes32390414
Predicted by Siyang on May 30, 202221.0878 minutes33406817
Predicted by Siyang using ReTip algorithm on June 8, 20222.91 minutes32390414
Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid4647.8 seconds40023050
Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid162.3 seconds40023050
Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid280.5 seconds40023050
Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid206.9 seconds40023050
RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid417.7 seconds40023050
Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid1045.3 seconds40023050
BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid800.4 seconds40023050
HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate)540.7 seconds40023050
UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid2017.6 seconds40023050
BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid987.0 seconds40023050
UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid2128.1 seconds40023050
SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid644.8 seconds40023050
RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid588.1 seconds40023050
MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate329.4 seconds40023050
KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA70.3 seconds40023050
Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water9.4 seconds40023050

Predicted Kovats Retention Indices

Not Available
Spectra

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 10V, Positive-QTOFsplash10-01q9-0000000009-abe5c201d573ef588b062021-10-19Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 20V, Positive-QTOFsplash10-03dj-2000000195-d66c738b83153583663e2021-10-19Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 40V, Positive-QTOFsplash10-0udi-4500009000-53fa843a7f1357c67e552021-10-19Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 10V, Negative-QTOFsplash10-004i-0000000009-edbc7dbfc19b102846432021-10-19Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 20V, Negative-QTOFsplash10-004i-0010002009-cbd149a6d1dd297443022021-10-19Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - PI(18:2(9Z,12Z)/PGE2) 40V, Negative-QTOFsplash10-014j-0000009010-778abd4983cecc70d50e2021-10-19Wishart LabView Spectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen LocationsNot Available
Tissue LocationsNot Available
Pathways
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDNot Available
KNApSAcK IDNot Available
Chemspider IDNot Available
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound156980028
PDB IDNot Available
ChEBI IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available