Biomaterial Database

Inhibition of 5-lipoxygenase by vitamin E. 1985

P Reddanna, and M K Rao, and C C Reddy

Purified 5-lipoxygenase from potato tubers was inhibited strongly by vitamin E and its analogs. The inhibition by d-alpha-tocopherol was found to be irreversible and non-competitive with respect to arachidonic acid. An IC50 of 5 microM was calculated for d-alpha-tocopherol. The inhibition appears to be unrelated to its antioxidant function. Binding studies with 14C-labelled d-alpha-tocopherol revealed that there is a strong interaction between vitamin E and 5-lipoxygenase. Tryptic digestion and peptide mapping of 5-lipoxygenase-vitamin E complex indicate that vitamin E binds strongly to a single peptide. These studies suggest that cellular vitamin E levels may have profound influence on the formation of leukotrienes.

UI	MeSH Term	Description	Entries
D008084	Lipoxygenase	An enzyme of the oxidoreductase class primarily found in PLANTS. It catalyzes reactions between linoleate and other fatty acids and oxygen to form hydroperoxy-fatty acid derivatives.	Lipoxidase,Linoleate-Oxygen Oxidoreductase,Lipoxygenase-1,Lipoxygenase-2,Linoleate Oxygen Oxidoreductase,Lipoxygenase 1,Lipoxygenase 2,Oxidoreductase, Linoleate-Oxygen
D009637	Masoprocol	A potent lipoxygenase inhibitor that interferes with arachidonic acid metabolism. The compound also inhibits formyltetrahydrofolate synthetase, carboxylesterase, and cyclooxygenase to a lesser extent. It also serves as an antioxidant in fats and oils.	Nordihydroguaiaretic Acid,(R,S)-4,4'-(2,3-Dimethylbutane-1,4-diyl)bispyrocatechol,Actinex,Dihydronorguaiaretic Acid,Nordihydroguaiaretic Acid, (R,S)-Isomer,meso-Nordihydroguaiaretic Acid,Acid, meso-Nordihydroguaiaretic,meso Nordihydroguaiaretic Acid
D011198	Solanum tuberosum	A plant species of the genus SOLANUM, family SOLANACEAE. The starchy roots are used as food. SOLANINE is found in green parts.	Potatoes,Potato,Solanum tuberosums,tuberosum, Solanum,tuberosums, Solanum
D002084	Butylated Hydroxytoluene	A di-tert-butyl PHENOL with antioxidant properties.	Butylhydroxytoluene,2,6-Bis(1,1-dimethylethyl)-4-methylphenol,2,6-Di-t-butyl-4-methylphenol,2,6-Di-tert-butyl-4-methylphenol,2,6-Di-tert-butyl-p-cresol,4-Methyl-2,6-ditertbutylphenol,BHT,Di-tert-butyl-methylphenol,Dibunol,Ionol,Ionol (BHT),2,6 Di t butyl 4 methylphenol,2,6 Di tert butyl 4 methylphenol,2,6 Di tert butyl p cresol,4 Methyl 2,6 ditertbutylphenol,Di tert butyl methylphenol,Hydroxytoluene, Butylated
D002396	Catechols	A group of 1,2-benzenediols that contain the general formula R-C6H5O2.	Pyrocatechols,o-Dihydroxybenzenes,ortho-Dihydroxybenzenes,o Dihydroxybenzenes,ortho Dihydroxybenzenes
D002850	Chromatography, Gel	Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.	Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D000975	Antioxidants	Naturally occurring or synthetic substances that inhibit or retard oxidation reactions. They counteract the damaging effects of oxidation in animal tissues.	Anti-Oxidant,Antioxidant,Antioxidant Activity,Endogenous Antioxidant,Endogenous Antioxidants,Anti-Oxidant Effect,Anti-Oxidant Effects,Anti-Oxidants,Antioxidant Effect,Antioxidant Effects,Activity, Antioxidant,Anti Oxidant,Anti Oxidant Effect,Anti Oxidant Effects,Anti Oxidants,Antioxidant, Endogenous,Antioxidants, Endogenous
D014810	Vitamin E	A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of ISOPRENOIDS.
D016859	Lipoxygenase Inhibitors	Compounds that bind to and inhibit that enzymatic activity of LIPOXYGENASES. Included under this category are inhibitors that are specific for lipoxygenase subtypes and act to reduce the production of LEUKOTRIENES.	5-Lipoxygenase Inhibitor,Lipoxygenase Inhibitor,12-Lipoxygenase Inhibitors,15-Lipoxygenase Inhibitors,5-Lipoxygenase Inhibitors,Arachidonate 12-Lipoxygenase Inhibitors,Arachidonate 15-Lipoxygenase Inhibitors,Arachidonate 5-Lipoxygenase Inhibitors,Inhibitors, Lipoxygenase,12 Lipoxygenase Inhibitors,12-Lipoxygenase Inhibitors, Arachidonate,15 Lipoxygenase Inhibitors,15-Lipoxygenase Inhibitors, Arachidonate,5 Lipoxygenase Inhibitor,5 Lipoxygenase Inhibitors,5-Lipoxygenase Inhibitors, Arachidonate,Arachidonate 12 Lipoxygenase Inhibitors,Arachidonate 15 Lipoxygenase Inhibitors,Arachidonate 5 Lipoxygenase Inhibitors,Inhibitor, 5-Lipoxygenase,Inhibitor, Lipoxygenase,Inhibitors, 12-Lipoxygenase,Inhibitors, 15-Lipoxygenase,Inhibitors, 5-Lipoxygenase,Inhibitors, Arachidonate 12-Lipoxygenase,Inhibitors, Arachidonate 15-Lipoxygenase,Inhibitors, Arachidonate 5-Lipoxygenase