Classification Term: 168613
Ubiquinones [PR0201] (ontology term: 373aa0bec53ba23aa0ba4c3d757d0c91)
Ubiquinones [PR0201]
found 22 associated metabolites at sub_class metabolite taxonomy ontology rank level.
Ancestor: Quinones and hydroquinones [PR02]
Child Taxonomies: There is no child term of current ontology term.
Coenzyme Q10
Coenzyme Q10 (ubiquinone) is a naturally occurring compound widely distributed in animal organisms and in humans. The primary compounds involved in the biosynthesis of ubiquinone are 4-hydroxybenzoate and the polyprenyl chain. An essential role of coenzyme Q10 is as an electron carrier in the mitochondrial respiratory chain. Moreover, coenzyme Q10 is one of the most important lipophilic antioxidants, preventing the generation of free radicals as well as oxidative modifications of proteins, lipids, and DNA, it and can also regenerate the other powerful lipophilic antioxidant, alpha-tocopherol. Antioxidant action is a property of the reduced form of coenzyme Q10, ubiquinol (CoQ10H2), and the ubisemiquinone radical (CoQ10H*). Paradoxically, independently of the known antioxidant properties of coenzyme Q10, the ubisemiquinone radical anion (CoQ10-) possesses prooxidative properties. Decreased levels of coenzyme Q10 in humans are observed in many pathologies (e.g. cardiac disorders, neurodegenerative diseases, AIDS, cancer) associated with intensive generation of free radicals and their action on cells and tissues. In these cases, treatment involves pharmaceutical supplementation or increased consumption of coenzyme Q10 with meals as well as treatment with suitable chemical compounds (i.e. folic acid or B-group vitamins) which significantly increase ubiquinone biosynthesis in the organism. Estimation of coenzyme Q10 deficiency and efficiency of its supplementation requires a determination of ubiquinone levels in the organism. Therefore, highly selective and sensitive methods must be applied, such as HPLC with UV or coulometric detection. For a number of years, coenzyme Q (CoQ10 in humans) was known for its key role in mitochondrial bioenergetics; later studies demonstrated its presence in other subcellular fractions and in plasma, and extensively investigated its antioxidant role. These two functions constitute the basis on which research supporting the clinical use of CoQ10 is founded. Also at the inner mitochondrial membrane level, coenzyme Q is recognized as an obligatory co-factor for the function of uncoupling proteins and a modulator of the transition pore. Furthermore, recent data reveal that CoQ10 affects expression of genes involved in human cell signalling, metabolism, and transport and some of the effects of exogenously administered CoQ10 may be due to this property. Coenzyme Q is the only lipid soluble antioxidant synthesized endogenously. In its reduced form, CoQH2, ubiquinol, inhibits protein and DNA oxidation but it is the effect on lipid peroxidation that has been most deeply studied. Ubiquinol inhibits the peroxidation of cell membrane lipids and also that of lipoprotein lipids present in the circulation. Dietary supplementation with CoQ10 results in increased levels of ubiquinol-10 within circulating lipoproteins and increased resistance of human low-density lipoproteins to the initiation of lipid peroxidation. Moreover, CoQ10 has a direct anti-atherogenic effect, which has been demonstrated in apolipoprotein E-deficient mice fed with a high-fat diet. (PMID: 15928598, 17914161). COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials C - Cardiovascular system > C01 - Cardiac therapy C26170 - Protective Agent > C275 - Antioxidant D018977 - Micronutrients > D014815 - Vitamins Same as: D01065 Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
3-Hexaprenyl-4-hydroxybenzoic acid
3-hexaprenyl-4-hydroxybenzoic acid is a member of the class of compounds known as polyprenylphenols. Polyprenylphenols are compounds containing a polyisoprene chain attached to a phenol group. Thus, 3-hexaprenyl-4-hydroxybenzoic acid is considered to be a quinone lipid molecule. 3-hexaprenyl-4-hydroxybenzoic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 3-hexaprenyl-4-hydroxybenzoic acid can be found in a number of food items such as grass pea, pine nut, muskmelon, and white mustard, which makes 3-hexaprenyl-4-hydroxybenzoic acid a potential biomarker for the consumption of these food products. 3-hexaprenyl-4-hydroxybenzoic acid exists in all eukaryotes, ranging from yeast to humans. In humans, 3-hexaprenyl-4-hydroxybenzoic acid is involved in the ubiquinone biosynthesis. 3-hexaprenyl-4-hydroxybenzoate is an intermediate in ubiquinone biosynthesis and is produced from 4-hydroxybenzoate by the enzyme 4-hydroxybenzoate hexaprenyltransferase.
Coenzyme Q4
2-decaprenyl-5-hydroxy-6-methoxy-3-methyl-1,4-benzoquinone
2-Decaprenyl-6-methoxy-3-methyl-1,4-benzoquinone
A polyprenylbenzoquinone that is 2-decaprenyl-1,4-benzoquinone carrying additional methyl and methoxy substituents at positions 3 and 6 respectively.
2-decaprenyl-6-methoxy-1,4-benzoquinone
3-decaprenyl-4,5-dihydroxybenzoic acid
A dihydroxybenzoic acid that is 3,4-dihydroxybenzoic acid in which the hydrogen at position 5 is substituted by a decaprenyl group.
3-decaprenyl-4-hydroxy-5-methoxybenzoic acid
A monohydroxybenzoic acid that is 4-hydroxybenzoic acid in which the hydrogens at positions 3 and 5 are substituted by a methoxy and a decaprenyl group.
Coenzyme Q9
D020011 - Protective Agents > D000975 - Antioxidants Coenzyme Q9 (Ubiquinone Q9), the major form of ubiquinone in rodents, is an amphipathic molecular component of the electron transport chain that functions as an endogenous antioxidant. Coenzyme Q9 attenuates the diabetes-induced decreases in antioxidant defense mechanisms. Coenzyme Q9 improves left ventricular performance and reduces myocardial infarct size and cardiomyocyte apoptosis[1][2]. Coenzyme Q9 (Ubiquinone Q9), the major form of ubiquinone in rodents, is an amphipathic molecular component of the electron transport chain that functions as an endogenous antioxidant. Coenzyme Q9 attenuates the diabetes-induced decreases in antioxidant defense mechanisms. Coenzyme Q9 improves left ventricular performance and reduces myocardial infarct size and cardiomyocyte apoptosis[1][2].
3-Demethylubiquinone-9
2-Hexaprenyl-6-methoxyphenol
A monomethoxybenzene that is 6-methoxyphenol substituted by a (all-trans)-hexaprenyl group at position 2.
Rhodoquinone
Rhodoquinone-9
coenzyme Q10
A ubiquinone having a side chain of 10 isoprenoid units. In the naturally occurring isomer, all isoprenyl double bonds are in the E- configuration. COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials C - Cardiovascular system > C01 - Cardiac therapy C26170 - Protective Agent > C275 - Antioxidant D018977 - Micronutrients > D014815 - Vitamins Same as: D01065 Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Isolated from beef heart. Ubiquinone 10 is found in animal foods.
