Record Information |
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Version | 1.0 |
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Creation date | 2011-09-21 00:17:36 UTC |
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Update date | 2015-07-21 06:57:17 UTC |
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Primary ID | FDB022663 |
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Secondary Accession Numbers | Not Available |
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Chemical Information |
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FooDB Name | 20-Hydroxy-leukotriene B4 |
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Description | 20-hydroxy- Leukotriene B4 (20-OH-LTB4) is an omega-hydroxylated metabolite of leukotriene B4 in human neutrophils. Elevated urinary concentrations of 20-OH-LTB4 and LTB4 are found in patients with Sjogren-Larsson syndrome (SLS, OMIM 270220), an autosomal recessively inherited neurocutaneous disorder caused by a deficiency of the microsomal enzyme fatty aldehyde dehydrogenase (FALDH), which as an essential role in LTB4 metabolism. Preterm birth seems to be one of the features of the syndrome. The reason for the preterm birth is unclear. It is hypothesized that it relates to the defective LTB4 degradation in SLS. The pathological urinary excretion of LTB4 and 20-OH-LTB4 is a biochemical marker for SLS. Surprisingly, 20-OH-LTB4 concentrations are normal in CSF. Leukotriene B4 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. 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. Metabolism of LTC4 occurs by sequential peptide cleavage reactions involving a gamma-glutamyl transpeptidase that forms LTD4 (leukotriene D4) and a membrane-bound dipeptidase that converts LTD4 into LTE4 (leukotriene E4) before w-oxidation. 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. (PMID: 12709426, 9799565, 11408337, 17623009)
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 signaling pathways. [HMDB] |
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CAS Number | 79516-82-8 |
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Structure | |
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Synonyms | |
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Predicted Properties | |
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Chemical Formula | C20H32O5 |
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IUPAC name | (5S,12R)-5,12,20-trihydroxyicosa-6,8,10,14-tetraenoic acid |
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InChI Identifier | InChI=1S/C20H32O5/c21-17-10-6-2-1-3-7-12-18(22)13-8-4-5-9-14-19(23)15-11-16-20(24)25/h3-5,7-9,13-14,18-19,21-23H,1-2,6,10-12,15-17H2,(H,24,25)/t18-,19-/m1/s1 |
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InChI Key | PTJFJXLGRSTECQ-RTBURBONSA-N |
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Isomeric SMILES | [H]C(C=CC=C[C@]([H])(O)CC=CCCCCCO)=C[C@@]([H])(O)CCCC(O)=O |
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Average Molecular Weight | 352.4651 |
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Monoisotopic Molecular Weight | 352.224974134 |
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Classification |
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Description | Belongs to the class of organic compounds known as leukotrienes. These are eicosanoids containing a hydroxyl group attached to the aliphatic chain of an arachidonic acid. Leukotrienes have four double bonds, three (and only three) of which are conjugated. |
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Kingdom | Organic compounds |
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Super Class | Lipids and lipid-like molecules |
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Class | Fatty Acyls |
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Sub Class | Eicosanoids |
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Direct Parent | Leukotrienes |
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Alternative Parents | |
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Substituents | - Leukotriene
- Hydroxyeicosatetraenoic acid
- Long-chain fatty acid
- Hydroxy fatty acid
- Fatty acid
- Unsaturated fatty acid
- Secondary alcohol
- Carboxylic acid derivative
- Carboxylic acid
- Monocarboxylic acid or derivatives
- Polyol
- Hydrocarbon derivative
- Organic oxide
- Organic oxygen compound
- Primary alcohol
- Carbonyl group
- Organooxygen compound
- Alcohol
- Aliphatic acyclic compound
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Molecular Framework | Aliphatic acyclic compounds |
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External Descriptors | Not Available |
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Ontology |
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Ontology | No ontology term |
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Physico-Chemical Properties |
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Physico-Chemical Properties - Experimental | |
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Spectra |
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Spectra | Not Available |
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External Links |
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ChemSpider ID | 4444320 |
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ChEMBL ID | CHEMBL1593789 |
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KEGG Compound ID | C04853 |
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Pubchem Compound ID | 5280745 |
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Pubchem Substance ID | Not Available |
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ChEBI ID | Not Available |
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Phenol-Explorer ID | Not Available |
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DrugBank ID | Not Available |
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HMDB ID | HMDB01509 |
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CRC / DFC (Dictionary of Food Compounds) ID | Not Available |
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EAFUS ID | Not Available |
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Dr. Duke ID | Not Available |
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BIGG ID | Not Available |
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KNApSAcK ID | Not Available |
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HET ID | Not Available |
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Food Biomarker Ontology | Not Available |
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VMH ID | Not Available |
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Flavornet ID | Not Available |
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GoodScent ID | Not Available |
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SuperScent ID | Not Available |
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Wikipedia ID | Not Available |
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Phenol-Explorer Metabolite ID | Not Available |
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Duplicate IDS | Not Available |
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Old DFC IDS | Not Available |
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Associated Foods |
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Biological Effects and Interactions |
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Health Effects / Bioactivities | Not Available |
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Enzymes | Not Available |
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Pathways | |
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Metabolism | Not Available |
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Biosynthesis | Not Available |
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Organoleptic Properties |
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Flavours | Not Available |
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Files |
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MSDS | show |
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References |
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Synthesis Reference | Not Available |
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General Reference | Not Available |
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Content Reference | |
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