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Record Information
Version2.0
Created at2022-05-12 15:23:10 UTC
Updated at2022-05-12 15:23:10 UTC
NP-MRD IDNP0136770
Secondary Accession NumbersNone
Natural Product Identification
Common Name20-Carboxy-leukotriene B4
Description20-Carboxy-leukotriene B4, also known as 20-COOH-LTB4 or 20-carboxy-LTB4, belongs to the class of organic compounds known as long-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Thus, 20-carboxy-leukotriene B4 is considered to be an eicosanoid lipid molecule. Other specific pathways of leukotriene metabolism include the 12-hydroxydehydrogenase/ 15-oxo-prostaglandin-13-reductase that form a series of conjugated diene metabolites that have been observed to be excreted into human urine. This activity has been ascribed to LTB4 omega-hydroxylase (cytochrome P-450LTB omega). 20-Carboxy-leukotriene B4 is a very hydrophobic molecule, practically insoluble (in water), and relatively neutral. In humans, 20-carboxy-leukotriene B4 is involved in mefenamic acid action pathway. These metabolic transformations of the primary leukotrienes are critical for termination of their biological activity, and defects in expression of participating enzymes may be involved in specific genetic disease. Leukotrienes are metabolites of arachidonic acid derived from the action of 5-LO (5-lipoxygenase). 20-Carboxyleukotriene B4 is an omega-oxidized metabolite of leukotriene B4 (LTB4). 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. All mammalian cells except erythrocytes synthesize eicosanoids. 20-Carboxy-leukotriene B4 was first documented in 1990 (PMID: 2155225). The eicosanoids consist of the prostaglandins (PGs), thromboxanes (TXs), leukotrienes (LTs), and lipoxins (LXs).
Structure
Thumb
Synonyms
Chemical FormulaC20H30O6
Average Mass366.4486 Da
Monoisotopic Mass366.20424 Da
IUPAC Name(5S,6Z,8E,10E,12R,14Z)-5,12-dihydroxyicosa-6,8,10,14-tetraenedioic acid
Traditional Name20-cooh-LTB4
CAS Registry NumberNot Available
SMILES
O[C@@H](CCCC(O)=O)\C=C/C=C/C=C/[C@H](O)C\C=C/CCCCC(O)=O
InChI Identifier
InChI=1S/C20H30O6/c21-17(11-6-2-1-3-9-15-19(23)24)12-7-4-5-8-13-18(22)14-10-16-20(25)26/h2,4-8,12-13,17-18,21-22H,1,3,9-11,14-16H2,(H,23,24)(H,25,26)/b5-4+,6-2-,12-7+,13-8-/t17-,18-/m1/s1
InChI KeySXWGPVJGNOLNHT-VFLUTPEKSA-N
Experimental Spectra
Not Available
Predicted Spectra
Chemical Shift Submissions
Not Available
Species
Species of OriginNot Available
Chemical Taxonomy
Description Belongs to the class of organic compounds known as long-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassFatty acids and conjugates
Direct ParentLong-chain fatty acids
Alternative Parents
Substituents
  • Long-chain fatty acid
  • Hydroxy fatty acid
  • Unsaturated fatty acid
  • Dicarboxylic acid or derivatives
  • Secondary alcohol
  • Carboxylic acid
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Alcohol
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateNot Available
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP3.17ALOGPS
logP2.81ChemAxon
logS-3.9ALOGPS
pKa (Strongest Acidic)4.33ChemAxon
pKa (Strongest Basic)-1.3ChemAxon
Physiological Charge-2ChemAxon
Hydrogen Acceptor Count6ChemAxon
Hydrogen Donor Count4ChemAxon
Polar Surface Area115.06 ŲChemAxon
Rotatable Bond Count15ChemAxon
Refractivity104.65 m³·mol⁻¹ChemAxon
Polarizability40.39 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDHMDB0006059
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB023824
KNApSAcK IDNot Available
Chemspider ID4444400
KEGG Compound IDC05950
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound5280877
PDB IDNot Available
ChEBI ID27562
Good Scents IDNot Available
References
General References
  1. Sumimoto H, Minakami S: Oxidation of 20-hydroxyleukotriene B4 to 20-carboxyleukotriene B4 by human neutrophil microsomes. Role of aldehyde dehydrogenase and leukotriene B4 omega-hydroxylase (cytochrome P-450LTB omega) in leukotriene B4 omega-oxidation. J Biol Chem. 1990 Mar 15;265(8):4348-53. [PubMed:2155225 ]