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Record Information
Version5.0
StatusExpected but not Quantified
Creation Date2006-05-22 15:12:25 UTC
Update Date2022-03-07 02:49:17 UTC
HMDB IDHMDB0002995
Secondary Accession Numbers
  • HMDB02995
Metabolite Identification
Common Name12-Keto-tetrahydro-leukotriene B4
Description12-keto-tetrahydro-Leukotriene B4 is an inactivated enzymatic metabolite of leukotriene B4(LTB4), product of the human liver enzyme leukotriene B4 (LTB4) 12-hydroxydehydrogenase, also found in the porcine kidney and other mammals. LTB4 is the major metabolite in neutrophil polymorphonuclear leukocytes. Leukotrienes are metabolites of arachidonic acid derived from the action of 5-LO (5-lipoxygenase). The immediate product of 5-LO is LTA4 (leukotriene A4), which is enzymatically converted into either LTB4 (leukotriene B4) by LTA4 hydrolase or LTC4 (leukotriene C4) by LTC4 synthase. The regulation of leukotriene production occurs at various levels, including expression of 5-LO, translocation of 5-LO to the perinuclear region and phosphorylation to either enhance or inhibit the activity of 5-LO. Biologically active LTB4 is metabolized by w-oxidation carried out by specific cytochrome P450s (CYP4F) followed by beta-oxidation from the w-carboxy position and after CoA ester formation. (PMID: 17623009 , 8394361 , 9667737 )Leukotrienes 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 signalling pathways.
Structure
Data?1582752260
Synonyms
ValueSource
12-Keto-10,11,14,15-tetrahydro-LTB4HMDB
5S-Hydroxy-12-keto-6Z,8E-eicosadienoateHMDB
5S-Hydroxy-12-keto-6Z,8E-eicosadienoic acidHMDB
Chemical FormulaC20H34O4
Average Molecular Weight338.4816
Monoisotopic Molecular Weight338.245709576
IUPAC Name(5S,6Z,8E)-5-hydroxy-12-oxoicosa-6,8-dienoic acid
Traditional Nameleukotriene B
CAS Registry NumberNot Available
SMILES
CCCCCCCCC(=O)CC\C=C\C=C/[C@@H](O)CCCC(O)=O
InChI Identifier
InChI=1S/C20H34O4/c1-2-3-4-5-6-9-13-18(21)14-10-7-8-11-15-19(22)16-12-17-20(23)24/h7-8,11,15,19,22H,2-6,9-10,12-14,16-17H2,1H3,(H,23,24)/b8-7+,15-11-/t19-/m1/s1
InChI KeyRRTYEHFGQWNQKK-KIQAWMAPSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as other hydroxyeicosapolyenoic acids. These are hydroxyeicosapolyenoic acids which do not belong to the Hydroxyeicosapentaenoic acids, the Hydroxyeicosatetraenoic acids, or the Hydroxyeicosatrienoic acids.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassEicosanoids
Direct ParentOther hydroxyeicosapolyenoic acids
Alternative Parents
Substituents
  • Hydroxyeicosapolyenoic acid
  • Long-chain fatty acid
  • Hydroxy fatty acid
  • Keto fatty acid
  • Fatty acid
  • Unsaturated fatty acid
  • Ketone
  • Secondary alcohol
  • Carboxylic acid derivative
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Organic oxide
  • Organic oxygen compound
  • Alcohol
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateSolid
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogP3.58Not Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
Predicted Chromatographic Properties
Spectra
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane (predicted from logP)
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 IDFDB023093
KNApSAcK IDNot Available
Chemspider ID4446246
KEGG Compound IDC02165
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound5283122
PDB IDNot Available
ChEBI ID15647
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

Enzymes

General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics.
Gene Name:
CYP4F2
Uniprot ID:
P78329
Molecular weight:
59852.825
General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. This enzyme requires molecular oxygen and NADPH for the omega-hydroxylation of LTB4, a potent chemoattractant for polymorphonuclear leukocytes.
Gene Name:
CYP4F3
Uniprot ID:
Q08477
Molecular weight:
59846.085
General function:
Involved in binding
Specific function:
Epoxide hydrolase that catalyzes the final step in the biosynthesis of the proinflammatory mediator leukotriene B4. Has also aminopeptidase activity.
Gene Name:
LTA4H
Uniprot ID:
P09960
Molecular weight:
69284.64