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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2009-11-30 15:50:05 UTC
Update Date2022-10-24 19:44:11 UTC
HMDB IDHMDB0013154
Secondary Accession Numbers
  • HMDB13154
Metabolite Identification
Common Name12-Hydroxy-12-octadecanoylcarnitine
Description12-Hydroxy-12-octadecanoylcarnitine is an acylcarnitine. More specifically, it is an 12-hydroxyoctadecanoic acid ester of carnitine. Acylcarnitines were first discovered more than 70 year ago (PMID: 13825279 ). It is believed that there are more than 1000 types of acylcarnitines in the human body. The general role of acylcarnitines is to transport acyl-groups (organic acids and fatty acids) from the cytoplasm into the mitochondria so that they can be broken down to produce energy.  This process is known as beta-oxidation. According to a recent review (PMID: 35710135 ), acylcarnitines (ACs) can be classified into 9 different categories depending on the type and size of their acyl-group: 1) short-chain ACs; 2) medium-chain ACs; 3) long-chain ACs; 4) very long-chain ACs; 5) hydroxy ACs; 6) branched chain ACs; 7) unsaturated ACs; 8) dicarboxylic ACs and 9) miscellaneous ACs. Short-chain ACs have acyl-groups with two to five carbons (C2-C5), medium-chain ACs have acyl-groups with six to thirteen carbons (C6-C13), long-chain ACs have acyl-groups with fourteen to twenty once carbons (C14-C21) and very long-chain ACs have acyl groups with more than 22 carbons. 12-Hydroxy-12-octadecanoylcarnitine is therefore classified as a long chain AC. As a long-chain acylcarnitine 12-hydroxy-12-octadecanoylcarnitine is generally formed through esterification with long-chain fatty acids obtained from the diet. The main function of most long-chain acylcarnitines is to ensure long chain fatty acid transport into the mitochondria (PMID: 22804748 ). Altered levels of long-chain acylcarnitines can serve as useful markers for inherited disorders of long-chain fatty acid metabolism. In particular 12-hydroxy-12-octadecanoylcarnitine is elevated in the blood or plasma of individuals with coronary artery disease (PMID: 20173117 ). Carnitine palmitoyltransferase I (CPT I, EC:2.3.1.21) is involved in the synthesis of long-chain acylcarnitines (more than C12) on the mitochondrial outer membrane.  Elevated serum/plasma levels of long-chain acylcarnitines are not only markers for incomplete FA oxidation but also are indicators of altered carbohydrate and lipid metabolism. High serum concentrations of long-chain acylcarnitines in the postprandial or fed state are markers of insulin resistance and arise from insulin's inability to inhibit CPT-1-dependent fatty acid metabolism in muscles and the heart (PMID: 19073774 ). Increased intracellular content of long-chain acylcarnitines is thought to serve as a feedback inhibition mechanism of insulin action (PMID: 23258903 ). In healthy subjects, increased concentrations of insulin effectively inhibits long-chain acylcarnitine production. Several studies have also found increased levels of circulating long-chain acylcarnitines in chronic heart failure patients (PMID: 26796394 ). The study of acylcarnitines is an active area of research and it is likely that many novel acylcarnitines will be discovered in the coming years. It is also likely that many novel roles in health and disease will be uncovered. An excellent review of the current state of knowledge for acylcarnitines is available (PMID: 35710135 ).
Structure
Data?1582753097
SynonymsNot Available
Chemical FormulaC25H49NO5
Average Molecular Weight443.6603
Monoisotopic Molecular Weight443.361073683
IUPAC Name3-[(12-hydroxyoctadecanoyl)oxy]-4-(trimethylazaniumyl)butanoate
Traditional Name3-[(12-hydroxyoctadecanoyl)oxy]-4-(trimethylammonio)butanoate
CAS Registry NumberNot Available
SMILES
CCCCCCC(O)CCCCCCCCCCC(=O)OC(CC([O-])=O)C[N+](C)(C)C
InChI Identifier
InChI=1S/C25H49NO5/c1-5-6-7-14-17-22(27)18-15-12-10-8-9-11-13-16-19-25(30)31-23(20-24(28)29)21-26(2,3)4/h22-23,27H,5-21H2,1-4H3
InChI KeyQAIWREXEZLJMTC-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as acyl carnitines. These are organic compounds containing a fatty acid with the carboxylic acid attached to carnitine through an ester bond.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassFatty acid esters
Direct ParentAcyl carnitines
Alternative Parents
Substituents
  • Acyl-carnitine
  • Dicarboxylic acid or derivatives
  • Tetraalkylammonium salt
  • Quaternary ammonium salt
  • Carboxylic acid ester
  • Carboxylic acid salt
  • Secondary alcohol
  • Carboxylic acid derivative
  • Carboxylic acid
  • Organic nitrogen compound
  • Organic zwitterion
  • Organooxygen compound
  • Organonitrogen compound
  • Organic salt
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Carbonyl group
  • Amine
  • Alcohol
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Ontology
Physiological effect
Disposition
Biological locationRoute of exposureSource
Process
Role
Physical Properties
StateSolid
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
Water Solubility5.6e-05 g/LALOGPS
logP1.49ALOGPS
logP1.54ChemAxon
logS-7ALOGPS
pKa (Strongest Acidic)4.22ChemAxon
pKa (Strongest Basic)-1.3ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area86.66 ŲChemAxon
Rotatable Bond Count22ChemAxon
Refractivity147.95 m³·mol⁻¹ChemAxon
Polarizability55.19 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DeepCCS[M+H]+218.8130932474
DeepCCS[M-H]-214.7930932474
DeepCCS[M-2H]-251.33330932474
DeepCCS[M+Na]+227.62530932474
AllCCS[M+H]+229.032859911
AllCCS[M+H-H2O]+227.332859911
AllCCS[M+NH4]+230.532859911
AllCCS[M+Na]+230.932859911
AllCCS[M-H]-219.332859911
AllCCS[M+Na-2H]-221.232859911
AllCCS[M+HCOO]-223.532859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
12-Hydroxy-12-octadecanoylcarnitineCCCCCCC(O)CCCCCCCCCCC(=O)OC(CC([O-])=O)C[N+](C)(C)C3284.3Standard polar33892256
12-Hydroxy-12-octadecanoylcarnitineCCCCCCC(O)CCCCCCCCCCC(=O)OC(CC([O-])=O)C[N+](C)(C)C2831.0Standard non polar33892256
12-Hydroxy-12-octadecanoylcarnitineCCCCCCC(O)CCCCCCCCCCC(=O)OC(CC([O-])=O)C[N+](C)(C)C3033.6Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
12-Hydroxy-12-octadecanoylcarnitine,1TMS,isomer #1CCCCCCC(CCCCCCCCCCC(=O)OC(CC(=O)[O-])C[N+](C)(C)C)O[Si](C)(C)C3020.9Semi standard non polar33892256
12-Hydroxy-12-octadecanoylcarnitine,1TBDMS,isomer #1CCCCCCC(CCCCCCCCCCC(=O)OC(CC(=O)[O-])C[N+](C)(C)C)O[Si](C)(C)C(C)(C)C3228.6Semi standard non polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - 12-Hydroxy-12-octadecanoylcarnitine GC-MS (1 TMS) - 70eV, Positivesplash10-00di-9111000000-06bb75c88e58b17e516d2017-10-06Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - 12-Hydroxy-12-octadecanoylcarnitine GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 12-Hydroxy-12-octadecanoylcarnitine 10V, Positive-QTOFsplash10-0006-0000900000-7fbce23f01126c5aa0af2021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 12-Hydroxy-12-octadecanoylcarnitine 20V, Positive-QTOFsplash10-000l-9000500000-aa486479e2b3d4f859aa2021-09-22Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 12-Hydroxy-12-octadecanoylcarnitine 40V, Positive-QTOFsplash10-000i-9000000000-e9262cbaff8cb4ad0ba62021-09-22Wishart LabView Spectrum
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
Biospecimen Locations
  • Blood
  • Urine
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothNormal details
UrineDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothNormal details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDFDB029311
KNApSAcK IDNot Available
Chemspider ID35032583
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound53481699
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 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. FRITZ IB: Action of carnitine on long chain fatty acid oxidation by liver. Am J Physiol. 1959 Aug;197:297-304. doi: 10.1152/ajplegacy.1959.197.2.297. [PubMed:13825279 ]
  6. Reuter SE, Evans AM: Carnitine and acylcarnitines: pharmacokinetic, pharmacological and clinical aspects. Clin Pharmacokinet. 2012 Sep 1;51(9):553-72. doi: 10.1007/BF03261931. [PubMed:22804748 ]
  7. Bruce CR, Hoy AJ, Turner N, Watt MJ, Allen TL, Carpenter K, Cooney GJ, Febbraio MA, Kraegen EW: Overexpression of carnitine palmitoyltransferase-1 in skeletal muscle is sufficient to enhance fatty acid oxidation and improve high-fat diet-induced insulin resistance. Diabetes. 2009 Mar;58(3):550-8. doi: 10.2337/db08-1078. Epub 2008 Dec 10. [PubMed:19073774 ]
  8. Schooneman MG, Vaz FM, Houten SM, Soeters MR: Acylcarnitines: reflecting or inflicting insulin resistance? Diabetes. 2013 Jan;62(1):1-8. doi: 10.2337/db12-0466. [PubMed:23258903 ]
  9. Ahmad T, Kelly JP, McGarrah RW, Hellkamp AS, Fiuzat M, Testani JM, Wang TS, Verma A, Samsky MD, Donahue MP, Ilkayeva OR, Bowles DE, Patel CB, Milano CA, Rogers JG, Felker GM, O'Connor CM, Shah SH, Kraus WE: Prognostic Implications of Long-Chain Acylcarnitines in Heart Failure and Reversibility With Mechanical Circulatory Support. J Am Coll Cardiol. 2016 Jan 26;67(3):291-9. doi: 10.1016/j.jacc.2015.10.079. [PubMed:26796394 ]
  10. Shah SH, Bain JR, Muehlbauer MJ, Stevens RD, Crosslin DR, Haynes C, Dungan J, Newby LK, Hauser ER, Ginsburg GS, Newgard CB, Kraus WE: Association of a peripheral blood metabolic profile with coronary artery disease and risk of subsequent cardiovascular events. Circ Cardiovasc Genet. 2010 Apr;3(2):207-14. doi: 10.1161/CIRCGENETICS.109.852814. Epub 2010 Feb 19. [PubMed:20173117 ]
  11. Dambrova M, Makrecka-Kuka M, Kuka J, Vilskersts R, Nordberg D, Attwood MM, Smesny S, Sen ZD, Guo AC, Oler E, Tian S, Zheng J, Wishart DS, Liepinsh E, Schioth HB: Acylcarnitines: Nomenclature, Biomarkers, Therapeutic Potential, Drug Targets, and Clinical Trials. Pharmacol Rev. 2022 Jul;74(3):506-551. doi: 10.1124/pharmrev.121.000408. [PubMed:35710135 ]
  12. Gunstone, Frank D., John L. Harwood, and Albert J. Dijkstra (2007). The lipid handbook with CD-ROM. CRC Press.