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Record Information
StatusExpected but not Quantified
Creation Date2008-09-22 20:01:20 UTC
Update Date2017-12-20 21:20:25 UTC
Secondary Accession Numbers
  • HMDB10495
Metabolite Identification
Common NameTG(18:2(9Z,12Z)/18:2(9Z,12Z)/22:5(7Z,10Z,13Z,16Z,19Z))
DescriptionTG(18:2(9Z,12Z)/18:2(9Z,12Z)/22:5(7Z,10Z,13Z,16Z,19Z))[iso3] is a dilinoleic acid triglyceride. Triglycerides (TGs) are also known as triacylglycerols or triacylglycerides, meaning that they are glycerides in which the glycerol is esterified with three fatty acid groups (i.e. fatty acid tri-esters of glycerol). TGs may be divided into three general types with respect to their acyl substituents. They are simple or monoacid if they contain only one type of fatty acid, diacid if they contain two types of fatty acids and triacid if three different acyl groups. Chain lengths of the fatty acids in naturally occurring triglycerides can be of varying lengths and saturations but 16, 18 and 20 carbons are the most common. TG(18:2(9Z,12Z)/18:2(9Z,12Z)/22:5(7Z,10Z,13Z,16Z,19Z))[iso3], in particular, consists of one chain of linoleic acid at the C-1 position, one chain of linoleic acid at the C-2 position and one chain of docosapentaenoic acid at the C-3 position. TGs are the main constituent of vegetable oil and animal fats. TGs are major components of very low density lipoprotein (VLDL) and chylomicrons, play an important role in metabolism as energy sources and transporters of dietary fat. They contain more than twice the energy (9 kcal/g) of carbohydrates and proteins. In the intestine, triglycerides are split into glycerol and fatty acids (this process is called lipolysis) with the help of lipases and bile secretions, which can then move into blood vessels. The triglycerides are rebuilt in the blood from their fragments and become constituents of lipoproteins, which deliver the fatty acids to and from fat cells among other functions. Various tissues can release the free fatty acids and take them up as a source of energy. Fat cells can synthesize and store triglycerides. When the body requires fatty acids as an energy source, the hormone glucagon signals the breakdown of the triglycerides by hormone-sensitive lipase to release free fatty acids. As the brain cannot utilize fatty acids as an energy source, the glycerol component of triglycerides can be converted into glucose for brain fuel when it is broken down. (, can serve as fatty acid stores in all cells, but primarily in adipocytes of adipose tissue. The major building block for the synthesis of triacylglycerides, in non-adipose tissue, is glycerol. Adipocytes lack glycerol kinase and so must use another route to TAG synthesis. Specifically, dihydroxyacetone phosphate (DHAP), which is produced during glycolysis, is the precursor for TAG synthesis in adipose tissue. DHAP can also serve as a TAG precursor in non-adipose tissues, but does so to a much lesser extent than glycerol. The use of DHAP for the TAG backbone depends on whether the synthesis of the TAGs occurs in the mitochondria and ER or the ER and the peroxisomes. The ER/mitochondria pathway requires the action of glycerol-3-phosphate dehydrogenase to convert DHAP to glycerol-3-phosphate. Glycerol-3-phosphate acyltransferase then esterifies a fatty acid to glycerol-3-phosphate thereby generating lysophosphatidic acid. The ER/peroxisome reaction pathway uses the peroxisomal enzyme DHAP acyltransferase to acylate DHAP to acyl-DHAP which is then reduced by acyl-DHAP reductase. The fatty acids that are incorporated into TAGs are activated to acyl-CoAs through the action of acyl-CoA synthetases. Two molecules of acyl-CoA are esterified to glycerol-3-phosphate to yield 1,2-diacylglycerol phosphate (also known as phosphatidic acid). The phosphate is then removed by phosphatidic acid phosphatase (PAP1), to generate 1,2-diacylglycerol. This diacylglycerol serves as the substrate for addition of the third fatty acid to make TAG. Intestinal monoacylglycerols, derived from dietary fats, can also serve as substrates for the synthesis of 1,2-diacylglycerols.
1-(9Z,12Z-octadecadienoyl)-2-(9Z,12Z-octadecadienoyl)-3-(7Z,10Z,13Z,16Z,19Z-docosapentaenoyl)-glycerol; Tracylglycerol(18:2/18:2/22:5)Lipid Annotator
TG(18:2(9Z,12Z)/18:2(9Z,12Z)/22:5(7Z,10Z,13Z,16Z,19Z))Lipid Annotator
1-(9Z,12Z-octadecadienoyl)-2-(9Z,12Z-octadecadienoyl)-3-(7Z,10Z,13Z,16Z,19Z-docosapentaenoyl)-glycerolLipid Annotator
Chemical FormulaC61H100O6
Average Molecular Weight929.465
Monoisotopic Molecular Weight928.75199094
IUPAC Name(2S)-2,3-bis[(9Z,12Z)-octadeca-9,12-dienoyloxy]propyl (7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoate
Traditional Name(2S)-2,3-bis[(9Z,12Z)-octadeca-9,12-dienoyloxy]propyl (7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoate
CAS Registry NumberNot Available
InChI Identifier
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as triacylglycerols. These are glycerides consisting of three fatty acid chains covalently bonded to a glycerol molecule through ester linkages.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
Sub ClassTriradylcglycerols
Direct ParentTriacylglycerols
Alternative Parents
  • Triacyl-sn-glycerol
  • Tricarboxylic acid or derivatives
  • Fatty acid ester
  • Fatty acyl
  • Carboxylic acid ester
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available

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Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility4.8e-06 g/LALOGPS
pKa (Strongest Basic)-6.6ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area78.9 ŲChemAxon
Rotatable Bond Count51ChemAxon
Refractivity297.35 m³·mol⁻¹ChemAxon
Polarizability117.96 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0002-0000000009-7315b539d407e6dd8ef8View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0002-0000000009-7315b539d407e6dd8ef8View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0002-0000099007-869e832a610788f4d5d4View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-01t9-0098003002-ade741512a83d8752edaView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01t9-0098001000-0e1edcf64f345aa0c564View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-004i-2095000000-4169d3a22732b50e7434View in MoNA
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
Biofluid LocationsNot Available
Tissue Location
  • All Tissues
De Novo Triacylglycerol Biosynthesis TG(18:2(9Z,12Z)/18:2(9Z,12Z)/22:5(7Z,10Z,13Z,16Z,19Z))Pw016983Pw016983 greyscalePw016983 simpleNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Predicted Concentrations
BiofluidValueOriginal ageOriginal sexOriginal conditionComments
Blood0.044745946 +/- 0.015541234 uMAdult (>18 years old)BothNormal (Most Probable)Calculated using MetaboAnalyst
Blood7.366666667 +/- 1.594783162 uMAdult (>18 years old)BothNormal (Upper Limit)Calculated using MetaboAnalyst
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB027646
KNApSAcK IDNot Available
Chemspider ID7824371
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound9545421
PDB IDNot Available
ChEBI IDNot Available
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Simons K, Toomre D: Lipid rafts and signal transduction. Nat Rev Mol Cell Biol. 2000 Oct;1(1):31-9. [PubMed:11413487 ]
  2. Watson AD: Thematic review series: systems biology approaches to metabolic and cardiovascular disorders. Lipidomics: a global approach to lipid analysis in biological systems. J Lipid Res. 2006 Oct;47(10):2101-11. Epub 2006 Aug 10. [PubMed:16902246 ]
  3. Sethi JK, Vidal-Puig AJ: Thematic review series: adipocyte biology. Adipose tissue function and plasticity orchestrate nutritional adaptation. J Lipid Res. 2007 Jun;48(6):1253-62. Epub 2007 Mar 20. [PubMed:17374880 ]
  4. Lingwood D, Simons K: Lipid rafts as a membrane-organizing principle. Science. 2010 Jan 1;327(5961):46-50. doi: 10.1126/science.1174621. [PubMed:20044567 ]
  5. Ghosh S, Strum JC, Bell RM: Lipid biochemistry: functions of glycerolipids and sphingolipids in cellular signaling. FASEB J. 1997 Jan;11(1):45-50. [PubMed:9034165 ]
  6. Gunstone, Frank D., John L. Harwood, and Albert J. Dijkstra (2007). The lipid handbook with CD-ROM. CRC Press.
  7. Linda T. Welson (2006). Triglycerides and Cholesterol Research. Nova Science Publishers Inc..

Only showing the first 10 proteins. There are 26 proteins in total.


General function:
Involved in catalytic activity
Specific function:
Not Available
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Molecular weight:
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Involved in catalytic activity
Specific function:
Hepatic lipase has the capacity to catalyze hydrolysis of phospholipids, mono-, di-, and triglycerides, and acyl-CoA thioesters. It is an important enzyme in HDL metabolism. Hepatic lipase binds heparin.
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Involved in catalytic activity
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May function as inhibitor of dietary triglyceride digestion. Lacks detectable lipase activity towards triglycerides, diglycerides, phosphatidylcholine, galactolipids or cholesterol esters (in vitro) (By similarity).
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Molecular weight:
Not Available
General function:
Involved in metabolic process
Specific function:
Multifunctional enzyme which has both triacylglycerol lipase and acylglycerol O-acyltransferase activities.
Gene Name:
Uniprot ID:
Molecular weight:
General function:
Involved in lipid metabolic process
Specific function:
Not Available
Gene Name:
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Molecular weight:
General function:
Involved in catalytic activity
Specific function:
Has phospholipase and triglyceride lipase activities. Hydrolyzes high density lipoproteins (HDL) more efficiently than other lipoproteins. Binds heparin.
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Lipid transport and metabolism
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Catalyzes fat and vitamin absorption. Acts in concert with pancreatic lipase and colipase for the complete digestion of dietary triglycerides.
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Involved in diacylglycerol O-acyltransferase activity
Specific function:
Catalyzes the terminal and only committed step in triacylglycerol synthesis by using diacylglycerol and fatty acyl CoA as substrates. In contrast to DGAT2 it is not essential for survival. May be involved in VLDL (very low density lipoprotein) assembly. In liver, plays a role in esterifying exogenous fatty acids to glycerol. Functions as the major acyl-CoA retinol acyltransferase (ARAT) in the skin, where it acts to maintain retinoid homeostasis and prevent retinoid toxicity leading to skin and hair disorders.
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Involved in catalytic activity
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Lipase with broad substrate specificity. Can hydrolyze both phospholipids and galactolipids. Acts preferentially on monoglycerides, phospholipids and galactolipids. Contributes to milk fat hydrolysis.
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Involved in catalytic activity
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The primary function of this lipase is the hydrolysis of triglycerides of circulating chylomicrons and very low density lipoproteins (VLDL). Binding to heparin sulfate proteogylcans at the cell surface is vital to the function. The apolipoprotein, APOC2, acts as a coactivator of LPL activity in the presence of lipids on the luminal surface of vascular endothelium (By similarity).
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General function:
Involved in lipid transporter activity
Specific function:
Catalyzes the transport of triglyceride, cholesteryl ester, and phospholipid between phospholipid surfaces. Required for the secretion of plasma lipoproteins that contain apolipoprotein B
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Only showing the first 10 proteins. There are 26 proteins in total.