Classification Term: 170265
Hydroxy fatty acids (ontology term: 71b5099a6a36e3eb44d8225ae1fce116)
found 428 associated metabolites at sub_class metabolite taxonomy ontology rank level.
Ancestor: Fatty Acids and Conjugates
Child Taxonomies: There is no child term of current ontology term.
View the spectrum consensus network of the metabolites belongs to current chemical taxonomy.
Citrate
Citric acid (citrate) is a tricarboxylic acid, an organic acid with three carboxylate groups. Citrate is an intermediate in the TCA cycle (also known as the Tricarboxylic Acid cycle, the Citric Acid cycle or Krebs cycle). The TCA cycle is a central metabolic pathway for all animals, plants, and bacteria. As a result, citrate is found in all living organisms, from bacteria to plants to animals. In the TCA cycle, the enzyme citrate synthase catalyzes the condensation of oxaloacetate with acetyl CoA to form citrate. Citrate then acts as the substrate for the enzyme known as aconitase and is then converted into aconitic acid. The TCA cycle ends with regeneration of oxaloacetate. This series of chemical reactions in the TCA cycle is the source of two-thirds of the food-derived energy in higher organisms. Citrate can be transported out of the mitochondria and into the cytoplasm, then broken down into acetyl-CoA for fatty acid synthesis, and into oxaloacetate. Citrate is a positive modulator of this conversion, and allosterically regulates the enzyme acetyl-CoA carboxylase, which is the regulating enzyme in the conversion of acetyl-CoA into malonyl-CoA (the commitment step in fatty acid synthesis). In short, citrate is transported into the cytoplasm, converted into acetyl CoA, which is then converted into malonyl CoA by acetyl CoA carboxylase, which is allosterically modulated by citrate. In mammals and other vertebrates, Citrate is a vital component of bone, helping to regulate the size of apatite crystals (PMID: 21127269). Citric acid is found in citrus fruits, most concentrated in lemons and limes, where it can comprise as much as 8\\\\\% of the dry weight of the fruit. Citric acid is a natural preservative and is also used to add an acidic (sour) taste to foods and carbonated drinks. Because it is one of the stronger edible acids, the dominant use of citric acid is as a flavoring and preservative in food and beverages, especially soft drinks and candies. Citric acid is an excellent chelating agent, binding metals by making them soluble. It is used to remove and discourage the buildup of limescale from boilers and evaporators. It can be used to treat water, which makes it useful in improving the effectiveness of soaps and laundry detergents. The salts of citric acid (citrates) can be used as anticoagulants due to their calcium chelating ability. Intolerance to citric acid in the diet is known to exist. Little information is available as the condition appears to be rare, but like other types of food intolerance it is often described as a "pseudo-allergic" reaction. Citric acid appears as colorless, odorless crystals with an acid taste. Denser than water. (USCG, 1999) Citric acid is a tricarboxylic acid that is propane-1,2,3-tricarboxylic acid bearing a hydroxy substituent at position 2. It is an important metabolite in the pathway of all aerobic organisms. It has a role as a food acidity regulator, a chelator, an antimicrobial agent and a fundamental metabolite. It is a conjugate acid of a citrate(1-) and a citrate anion. A key intermediate in metabolism. It is an acid compound found in citrus fruits. The salts of citric acid (citrates) can be used as anticoagulants due to their calcium-chelating ability. Citric acid is one of the active ingredients in Phexxi, a non-hormonal contraceptive agent that was approved by the FDA on May 2020. It is also used in combination with magnesium oxide to form magnesium citrate, an osmotic laxative. Citric acid is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). Anhydrous citric acid is a Calculi Dissolution Agent and Anti-coagulant. The mechanism of action of anhydrous citric acid is as an Acidifying Activity and Calcium Chelating Activity. The physiologic effect of anhydrous citric acid is by means of Decreased Coagulation Factor Activity. Anhydrous Citric Acid is a tricarboxylic acid found in citrus fruits. Citric acid is used as an excipient in pharmaceutical preparations due to its antioxidant properties. It maintains stability of active ingredients and is used as a preservative. It is also used as an acidulant to control pH and acts as an anticoagulant by chelating calcium in blood. A key intermediate in metabolism. It is an acid compound found in citrus fruits. The salts of citric acid (citrates) can be used as anticoagulants due to their calcium chelating ability. See also: Citric Acid Monohydrate (related). Citrate, also known as anhydrous citric acid or 2-hydroxy-1,2,3-propanetricarboxylic acid, belongs to tricarboxylic acids and derivatives class of compounds. Those are carboxylic acids containing exactly three carboxyl groups. Citrate is soluble (in water) and a weakly acidic compound (based on its pKa). Citrate can be found in a number of food items such as ucuhuba, loquat, bayberry, and longan, which makes citrate a potential biomarker for the consumption of these food products. Citrate can be found primarily in most biofluids, including saliva, sweat, feces, and blood, as well as throughout all human tissues. Citrate exists in all living species, ranging from bacteria to humans. In humans, citrate is involved in several metabolic pathways, some of which include the oncogenic action of succinate, the oncogenic action of fumarate, the oncogenic action of 2-hydroxyglutarate, and congenital lactic acidosis. Citrate is also involved in several metabolic disorders, some of which include 2-ketoglutarate dehydrogenase complex deficiency, pyruvate dehydrogenase deficiency (E2), fumarase deficiency, and glutaminolysis and cancer. Moreover, citrate is found to be associated with lung Cancer, tyrosinemia I, maple syrup urine disease, and propionic acidemia. A citrate is a derivative of citric acid; that is, the salts, esters, and the polyatomic anion found in solution. An example of the former, a salt is trisodium citrate; an ester is triethyl citrate. When part of a salt, the formula of the citrate ion is written as C6H5O73− or C3H5O(COO)33− . A tricarboxylic acid that is propane-1,2,3-tricarboxylic acid bearing a hydroxy substituent at position 2. It is an important metabolite in the pathway of all aerobic organisms. Citric acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=77-92-9 (retrieved 2024-07-01) (CAS RN: 77-92-9). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3]. Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3].
3-Hydroxyisovaleric acid
3-Hydroxyisovaleric acid is a normal human metabolite excreted in the urine. It is a byproduct of the leucine degradation pathway. Production of 3-hydroxyisovaleric acid begins with the conversion of 3-methylcrotonyl-CoA into 3-methylglutaconyl-CoA in the mitochondria by the biotin-dependent enzyme methylcrotonyl-CoA carboxylase. Biotin deficiencies, certain lifestyle habits (smoking), or specific genetic conditions can reduce methylcrotonyl-CoA carboxylase activity. This reduction can lead to a buildup of 3-methylcrotonyl-CoA, which is converted into 3-hydroxyisovaleryl-CoA by the enzyme enoyl-CoA hydratase. Increased concentrations of 3-methylcrotonyl-CoA and 3-hydroxyisovaleryl-CoA can lead to a disruption of the esterified CoA:free CoA ratio, and ultimately to mitochondrial toxicity. Detoxification of these metabolic end products occur via the transfer of the 3-hydroxyisovaleryl moiety to carnitine forming 3-hydroxyisovaleric acid-carnitine or 3HIA-carnitine, which is then transferred across the inner mitochondrial membrane where 3-hydroxyisovaleric acid is released as the free acid (PMID: 21918059). 3-Hydroxyisovaleric acid has been found to be elevated in smokers and in subjects undergoing long-term anticonvulsant therapy with carbamazepine and/or phenytoin. These levels are elevated due to impairment of renal reclamation of biotin. Levels may also be increased from prolonged consumption of raw egg-whites (PMID: 16895887, 9523856, 15447901, 9176832) (OMIM: 210210, 253270, 600529, 253260, 246450, 210200, 238331). When present in sufficiently high levels, 3-hydroxyisovaleric acid can act as an acidogen and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of 3-hydroxyisovaleric acid are associated with at least a dozen inborn errors of metabolism, including 3-hydroxy-3-methylglutaryl-CoA lyase deficiency, 3-methylglutaconic aciduria type I, biotinidase deficiency and isovaleric aciduria, dihydrolipoamide dehydrogenase deficiency, 3-methylcrotonyl-CoA carboxylase 1 deficiency, 3-hydroxy-3-methylglutaryl-CoA lyase deficiency, late-onset multiple carboxylase deficiency, holocarboxylase synthetase deficiency, and 3-methylcrotonyl-CoA carboxylase 2 deficiency. 3-Hydroxyisovaleric acid is an organic acid. Abnormally high levels of organic acids in the blood (organic acidemia), urine (organic aciduria), the brain, and other tissues lead to general metabolic acidosis. Acidosis typically occurs when arterial pH falls below 7.35. In infants with acidosis, the initial symptoms include poor feeding, vomiting, loss of appetite, weak muscle tone (hypotonia), and lack of energy (lethargy). These can progress to heart, liver, and kidney abnormalities, seizures, coma, and possibly death. These are also the characteristic symptoms of the untreated IEMs mentioned above. Many affected children with organic acidemias experience intellectual disability or delayed development. In adults, acidosis or acidemia is characterized by headaches, confusion, feeling tired, tremors, sleepiness, and seizures. 3-Hydroxyisovaleric acid is a normal human metabolite excreted in the urine. Elevated levels of this compound are found in several inherited disorders such as Dihydrolipoamide dehydrogenase Deficiency, 3-Methylcrotonyl-CoA carboxylase 1 deficiency, 3-Hydroxy-3-methylglutaryl-CoA lyase deficiency (3-hydroxy-3-methylglutaryl -CoA lyase Deficiency, Biotinidase deficiency multiple carboxylase deficiency late-onset , Late onset multiple carboxylase deficiency, HolMcarboxylase synthetase deficiency, 3-Methylcrotonyl-CoA carboxylase 2 deficiency. 3-Hydroxyisovaleric acid is also elevated in smokers, in subjects undergoing long-term anticonvulsant therapy with carbamazepine and/or phenytoin. These levels are elevated due to impairment of renal reclamation of biotin. Levels may also be increased from prolonged consumption of raw egg-whites (PMID: 16895887, 9523856, 15447901, 9176832)(OMIM: 210210, 253270, 600529, 253260, 246450, 210200, 238331) [HMDB] 3-Hydroxyisovaleric acid is a normal endogenous metabolite excreted in the urine. The urinary excretion of 3-hydroxyisovaleric acid is early and sensitive indicator of biotin deficiency[1][2]. 3-Hydroxyisovaleric acid is a normal endogenous metabolite excreted in the urine. The urinary excretion of 3-hydroxyisovaleric acid is early and sensitive indicator of biotin deficiency[1][2].
10-Hydroxydecanoic acid
10-hydroxycapric acid is a 10-carbon, omega-hydroxy fatty acid, shown to be the preferred hydroxylation product (together with the 9-OH isomer) of capric acid in biosystems, and used as a standard in lipid assays; reported to have cytotoxic effects. It is a straight-chain saturated fatty acid and an omega-hydroxy-medium-chain fatty acid. It is functionally related to a decanoic acid. It is a conjugate acid of a 10-hydroxycaprate. 10-Hydroxydecanoic acid, also known as 10-OH-capric acid or 10-OH-caprate, belongs to the class of organic compounds known as medium-chain hydroxy acids and derivatives. These are hydroxy acids with a 6 to 12 carbon atoms long side chain. Based on a literature review a significant number of articles have been published on 10-Hydroxydecanoic acid. This compound has been identified in human blood as reported by (PMID: 31557052 ). 10-hydroxydecanoic acid is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically 10-Hydroxydecanoic acid is part of the human exposome. The exposome can be defined as the collection of all the exposures of an individual in a lifetime and how those exposures relate to health. An individual's exposure begins before birth and includes insults from environmental and occupational sources. 10-Hydroxydecanoic acid (NSC 15139) is a saturated fatty acid of 10-hydroxy-trans-2-decenoic acid from royal jelly, with anti-inflammatory activity[1].
12-Hydroxydodecanoic acid
12-hydroxydodecanoic acid is the substrate of the human glutathione-dependent formaldehyde dehydrogenase (EC1.1.1.1). The enzyme that catalyzes the conversion of alcohols to aldehydes is a zinc-containing dimeric enzyme responsible for the oxidation of long-chain alcohols and omega-hydroxy fatty acids. (OMIM). The human glutathione-dependent formaldehyde dehydrogenase is unique among the structurally studied members of the alcohol dehydrogenase family in that it follows a random bi kinetic mechanism forming a binary complex, and a ternary complex with NAD+. (PMID 12196016). 12-hydroxydodecanoic acid is the substrate of the human glutathione-dependent formaldehyde dehydrogenase (EC1.1.1.1) . The enzyme that catalyzes the conversion of alcohols to aldehydes is a zinc-containing dimeric enzyme responsible for the oxidation of long-chain alcohols and omega-hydroxy fatty acids. (OMIM) 12-Hydroxydodecanoic acid is an endogenous metabolite.
D-Glycerate 3-phosphate
3-phospho-d-glyceric acid, also known as 3-phosphoglycerate or D-glycerate 3-phosphate, belongs to sugar acids and derivatives class of compounds. Those are compounds containing a saccharide unit which bears a carboxylic acid group. 3-phospho-d-glyceric acid is soluble (in water) and a moderately acidic compound (based on its pKa). 3-phospho-d-glyceric acid can be found in a number of food items such as towel gourd, orange mint, guava, and mulberry, which makes 3-phospho-d-glyceric acid a potential biomarker for the consumption of these food products. 3-phospho-d-glyceric acid can be found primarily in saliva. 3-phospho-d-glyceric acid exists in all living species, ranging from bacteria to humans. (2R)-2-Hydroxy-3-(phosphonatooxy)propanoate, also known as 3-phospho-(R)-glycerate or D-glycerate 3-phosphate, belongs to the class of organic compounds known as sugar acids and derivatives. Sugar acids and derivatives are compounds containing a saccharide unit which bears a carboxylic acid group (2R)-2-Hydroxy-3-(phosphonatooxy)propanoate is a drug (2R)-2-hydroxy-3-(phosphonatooxy)propanoate has been detected, but not quantified, in several different foods, such as poppies, small-leaf lindens, lupines, pomegranates, and kombus. These are compounds containing a saccharide unit which bears a carboxylic acid group.
Glycerate
Glyceric acid is a colourless syrupy acid, obtained from oxidation of glycerol. It is a compound that is secreted excessively in the urine by patients suffering from D-glyceric aciduria, an inborn error of metabolism, and D-glycerate anemia. Deficiency of human glycerate kinase leads to D-glycerate acidemia/D-glyceric aciduria. Symptoms of the disease include progressive neurological impairment, hypotonia, seizures, failure to thrive, and metabolic acidosis. At sufficiently high levels, glyceric acid can act as an acidogen and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Glyceric acid is an organic acid. Abnormally high levels of organic acids in the blood (organic acidemia), urine (organic aciduria), the brain, and other tissues lead to general metabolic acidosis. Acidosis typically occurs when arterial pH falls below 7.35. In infants with acidosis, the initial symptoms include poor feeding, vomiting, loss of appetite, weak muscle tone (hypotonia), and lack of energy (lethargy). These can progress to heart abnormalities, seizures, coma, and possibly death. These are also the characteristic symptoms of untreated glyceric aciduria. Many affected children with organic acidemias experience intellectual disability or delayed development. In adults, acidosis or acidemia is characterized by headaches, confusion, feeling tired, tremors, sleepiness, and seizures. Elevated values may also be due to microbial sources such as yeast (Aspergillus, Penicillium, probably Candida) or due to dietary sources containing glycerol (glycerine). Glyceric acid is isolated from various plants (e.g. brassicas, pulses, and Vicia faba). A colorless syrupy acid, obtained from oxidation of glycerol. It is a compound that is secreted excessively in the urine by patients suffering from D-glyceric aciduria and D-glycerate anemia. Deficiency of human glycerate kinase leads to D-glycerate acidemia/D-glyceric aciduria. Symptoms of the disease include progressive neurological impairment, hypotonia, seizures, failure to thrive and metabolic acidosis.; Glyceric acid is a natural three-carbon sugar acid. Salts and esters of glyceric acid are known as glycerates. Glyceric acid is found in many foods, some of which are peanut, common grape, garden tomato (variety), and french plantain. Glyceric acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=473-81-4 (retrieved 2024-06-29) (CAS RN: 473-81-4). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).
6-Hydroxyhexanoic acid
6-Hydroxyhexanoate was identified as the immediate product of hexanoate w-hydroxylation by whole cells and was further oxidized into adipic acid and an unexpected metabolite identified as 2-tetrahydrofuranacetic acid. This same metabolite, together with adipic acid, was also detected when similarly induced cells were incubated with hexanoate or 1,6-hexanediol, but not with 6-oxohexanoate (adipic semialdehyde).Cells grown on hexanoate and incubated with 6-hydroxyhexanoate were also found to accumulate 2-tetrahydrofuranacetic acid, which was not further degraded. Utilization of 6-hydroxyhexanoate for growth was restricted to those organisms also able to utilize adipate. Similar observations were made with 1,6-hexanediol serving as the carbon source and cells obtained from one organism,Pseudomonas aeruginosa PAO, grown either on 1,6-hexanediol or 6-hydroxyhexanoate,were found to be well induced for both 6-oxohexanoate and adipate oxidation. The results indicate that 6-hydroxyhexanoate and 1,6-hexanediol are susceptible to both 1B- and w-oxidative attack; however, the former pathway appears to be of no physiological significance since it generates 2-tetrahydrofuranacetic acid as a nonmetabolizable intermediate, making w-oxidation via adipate the exclusive pathway for degradation. [HMDB] 6-Hydroxyhexanoate was identified as the immediate product of hexanoate w-hydroxylation by whole cells and was further oxidized into adipic acid and an unexpected metabolite identified as 2-tetrahydrofuranacetic acid. This same metabolite, together with adipic acid, was also detected when similarly induced cells were incubated with hexanoate or 1,6-hexanediol, but not with 6-oxohexanoate (adipic semialdehyde).Cells grown on hexanoate and incubated with 6-hydroxyhexanoate were also found to accumulate 2-tetrahydrofuranacetic acid, which was not further degraded. Utilization of 6-hydroxyhexanoate for growth was restricted to those organisms also able to utilize adipate. Similar observations were made with 1,6-hexanediol serving as the carbon source and cells obtained from one organism,Pseudomonas aeruginosa PAO, grown either on 1,6-hexanediol or 6-hydroxyhexanoate,were found to be well induced for both 6-oxohexanoate and adipate oxidation. The results indicate that 6-hydroxyhexanoate and 1,6-hexanediol are susceptible to both 1B- and w-oxidative attack; however, the former pathway appears to be of no physiological significance since it generates 2-tetrahydrofuranacetic acid as a nonmetabolizable intermediate, making w-oxidation via adipate the exclusive pathway for degradation. KEIO_ID H061
Threonate
Threonic acid, also known as threonate, belongs to the class of organic compounds known as sugar acids and derivatives. Sugar acids and derivatives are compounds containing a saccharide unit which bears a carboxylic acid group. Threonic acid is a sugar acid derived from threose. The L-isomer is a metabolite of ascorbic acid (vitamin C). One study suggested that because L-threonate inhibits DKK1 expression in vitro, it may have potential in the treatment of androgenic alopecia (PMID:21034532). Threonic acid is probably derived from glycated proteins or from degradation of ascorbic acid. It is a normal component in aqueous humour and blood (PMID:10420182). Threonic acid is a substrate of L-threonate 3-dehydrogenase (EC 1.1.1.129) in the ascorbate and aldarate metabolism pathway (KEGG). It has been found to be a microbial metabolite (PMID:20615997). L-threonic acid, also known as L-threonate or L-threonic acid magnesium salt, belongs to sugar acids and derivatives class of compounds. Those are compounds containing a saccharide unit which bears a carboxylic acid group. L-threonic acid is soluble (in water) and a weakly acidic compound (based on its pKa). L-threonic acid can be found in a number of food items such as buffalo currant, yam, purslane, and bayberry, which makes L-threonic acid a potential biomarker for the consumption of these food products. L-threonic acid can be found primarily in blood. Threonic acid is a sugar acid derived from threose. The L-isomer is a metabolite of ascorbic acid (vitamin C). One study suggested that because L-threonate inhibits DKK1 expression in vitro, it may have potential in treatment of androgenic alopecia .
Mevalonic acid
Mevalonic acid, also known as MVA, mevalonate, or hiochic acid, belongs to the class of organic compounds known as hydroxy fatty acids. These are fatty acids in which the chain bears a hydroxyl group. Mevalonic acid is a key organic compound in biochemistry. It is found in most higher organisms ranging from plants to animals. Mevalonic acid is a precursor in the biosynthetic pathway known as the mevalonate pathway that produces terpenes (in plants) and steroids (in animals). Mevalonic acid is the primary precursor of isopentenyl pyrophosphate (IPP), that is in turn the basis for all terpenoids. The production of mevalonic acid by the enzyme 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase, is the rate-limiting step in the biosynthesis of cholesterol (PMID: 12872277). The cholesterol biosynthetic pathway has three major steps: (1) acetate to mevalonate, (2) mevalonate to squalene, and (3) squalene to cholesterol. In the first step, which catalyzed by thiolase, two acetyl-CoA molecules form acetoacetyl-CoA and one CoA molecule is released, then the acetoacetyl-CoA reacts with another molecule of acetyl-CoA and generates 3-hydroxy-3-methylglutaryl-CoA (HMGCoA). The enzyme responsible for this reaction is 3-hydroxy-3-methylglutaryl-CoA synthase (HMG-CoA synthase): In the pathway to synthesize cholesterol, one of the HMG-CoA carboxyl groups undergoes reduction to an alcohol, releasing CoA, leading to the formation of mevalonate, a six carbon compound. This reaction is catalyzed by hydroxy-methylglutaryl-CoA reductase, In the second step (mevalonate to squalene) mevalonate receives a phosphoryl group from ATP to form 5-phosphomevalonate. This compound accepts another phosphate to generate mevalonate-5-pyrophosphate. After a third phosphorylation, the compound is decarboxylated, loses water, and generates isopentenyl pyrophosphate (IPP). Then through successive condensations, IPP forms squalene, a terpene hydrocarbon that contains 30 carbon atoms. By cyclization and other changes, this compound will finally result in cholesterol. Mevalonic acid is found, on average, in the highest concentration within a few different foods, such as apples, corns, and wild carrots and in a lower concentration in garden tomato (var.), pepper (C. frutescens), and cucumbers. Mevalonic acid has also been detected, but not quantified in, several different foods, such as sweet oranges, potato, milk (cow), cabbages, and white cabbages. This could make mevalonic acid a potential biomarker for the consumption of these foods. Plasma concentrations and urinary excretion of MVA are decreased by HMG-CoA reductase inhibitor drugs such as pravastatin, simvastatin, and atorvastatin (PMID: 8808497). Mevalonic acid (MVA) is a key organic compound in biochemistry. The anion of mevalonic acid, the predominant form in biological media, is known as mevalonate. This compound is of major pharmaceutical importance. Drugs, such as the statins, stop the production of mevalonate by inhibiting HMG-CoA reductase. [Wikipedia]. Mevalonic acid is found in many foods, some of which are pepper (c. frutescens), cabbage, wild carrot, and white cabbage.
16-Hydroxyhexadecanoic acid
16-Hydroxyhexadecanoic acid, also known as 16-hydroxypalmitic acid, is a hydroxylated fatty acid where the terminal (omega) carbon has been hydroxylated. In animal tissues, a family of enzymes termed cytochromes P450s are involved in fatty acid oxidation, hydroxylating with high specificity at the energetically unfavourable terminal (omega) or omega-1 carbons. Hydroxy fatty acids primarily come from the consumption of plant products (vegetables or fruits) or cow’s milk. Omega hydroxy fatty acids are found in the structure of suberin, a lipid polyester present in plant cell walls, and of cutin, a lipid polyester which is a component of the plant cuticle. These apoplastic structures are important plant-environment interfaces that act as barriers limiting water and nutrient loss and protecting plants from radiation and pathogens. 16-Hydroxyhexadecanoic acid and 18-hydroxystearic acid are particularly abundant in cutin in the plant cuticle. 16-Hydroxyhexadecanoic acid has been proposed as a biomarker of beer consumption. 16-hydroxy-hexadecanoic acid, also known as 16-hydroxypalmitic acid or 16-oh 16:0, is a member of the class of compounds known as long-chain fatty acids. Long-chain fatty acids are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Thus, 16-hydroxy-hexadecanoic acid is considered to be a fatty acid lipid molecule. 16-hydroxy-hexadecanoic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 16-hydroxy-hexadecanoic acid can be synthesized from hexadecanoic acid. 16-hydroxy-hexadecanoic acid is also a parent compound for other transformation products, including but not limited to, (3R)-3,16-dihydroxypalmitic acid, oscr#28, and 16-hydroxyhexadecanoyl-CoA. 16-hydroxy-hexadecanoic acid can be found in a number of food items such as other cereal product, hyacinth bean, red rice, and elliotts blueberry, which makes 16-hydroxy-hexadecanoic acid a potential biomarker for the consumption of these food products.
2-Hydroxymyristic acid
2-Hydroxymyristic acid is an analog of myristic acid that becomes metabolically activated in cells to form 2-hydroxymyristoyl-CoA, a potent inhibitor of myristoyl-CoA:protein N-myristoyltransferase, the enzyme that catalyzes protein N-myristoylation. Treatment of T cells with 2-hydroxymyristic acid inhibits the myristoylation and alters the stability of p56lck. (PMID 8103677) [HMDB] 2-Hydroxymyristic acid is an analog of myristic acid that becomes metabolically activated in cells to form 2-hydroxymyristoyl-CoA, a potent inhibitor of myristoyl-CoA:protein N-myristoyltransferase, the enzyme that catalyzes protein N-myristoylation. Treatment of T cells with 2-hydroxymyristic acid inhibits the myristoylation and alters the stability of p56lck. (PMID 8103677).
2-Hydroxyglutaric acid
In humans, D-2-hydroxyglutaric acid is formed by a hydroxyacid-oxoacid transhydrogenase whereas in bacteria it is formed by a 2-hydroxyglutarate synthase. D-2-Hydroxyglutaric acid is also formed via the normal activity of hydroxyacid-oxoacid transhydrogenase during conversion of 4-hydroxybutyrate to succinate semialdehyde. The compound can be converted to alpha-ketoglutaric acid through the action of a 2-hydroxyglutarate dehydrogenase (EC 1.1.99.2). In humans, there are two such enzymes (D2HGDH and L2HGDH). Both the D and the L stereoisomers of hydroxyglutaric acid are found in body fluids. D-2-Hydroxyglutaric acid is a biochemical hallmark of the inherited neurometabolic disorder D-2-hydroxyglutaric aciduria (OMIM: 600721) and the genetic disorder glutaric aciduria II. D-2-Hydroxyglutaric aciduria (caused by loss of D2HGDH or gain of function of IDH) is rare, with symptoms including cancer, macrocephaly, cardiomyopathy, mental retardation, hypotonia, and cortical blindness. An elevated urine level of D-2-hydroxyglutaric acid has been reported in patients with spondyloenchondrodysplasia (OMIM: 271550). D-2-Hydroxyglutaric acid can be converted to alpha-ketoglutaric acid through the action of 2-hydroxyglutarate dehydrogenase (D2HGDH). Additionally, the enzyme D-3-phosphoglycerate dehydrogenase (PHGDH) can catalyze the NADH-dependent reduction of alpha-ketoglutarate (AKG) to D-2-hydroxyglutarate (D-2HG). Nyhan et al. (1995) described 3 female patients, 2 of them sibs, who were found to have excess accumulation of D-2-hydroxyglutaric acid in the urine. The phenotype was quite variable, even among the sibs, but included mental retardation, macrocephaly with cerebral atrophy, hypotonia, seizures, and involuntary movements. One of the patients developed severe intermittent vomiting and was given a pyloromyotomy. The electroencephalogram demonstrated hypsarrhythmia. There was an increased concentration of protein in cerebrospinal fluid, an unusual finding in inborn errors of metabolism. D-2-Hydroxyglutaric acid can also be produced via gain-of-function mutations in the cytosolic and mitochondrial isoforms of isocitrate dehydrogenase (IDH). IDH is part of the TCA cycle and this compound is generated in high abundance when IDH is mutated. Since D-2-hydroxyglutaric acid is sufficiently similar in structure to 2-oxoglutarate (2OG), it is able to inhibit a range of 2OG-dependent dioxygenases, including histone lysine demethylases (KDMs) and members of the ten-eleven translocation (TET) family of 5-methylcytosine (5mC) hydroxylases. This inhibitory effect leads to alterations in the hypoxia-inducible factor (HIF)-mediated hypoxic response and alterations in gene expression through global epigenetic remodeling. The net effect is that D-2-hydroxyglutaric acid causes a cascading effect that leads genetic perturbations and malignant transformation. Depending on the circumstances, D-2-hydroxyglutaric acid can act as an oncometabolite, a neurotoxin, an acidogen, and a metabotoxin. An oncometabolite is a compound that promotes tumour growth and survival. A neurotoxin is compound that is toxic to neurons or nerual tissue. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. As an oncometabolite, D-2-hydroxyglutaric acid is a competitive inhibitor of multiple alpha-ketoglutarate-dependent dioxygenases, including histone demethylases and the TET family of 5mC hydroxylases. As a result, high levels of 2-hydroxyglutarate lead to genome-wide histone and DNA methylation alterations, which in turn lead to mutations that ultimately cause cancer (PMID: 29038145). As a neurotoxin, D-2-hydroxyglutaric acid mediates its neurotoxicity through activation of N-methyl-D-aspartate receptors. D-2-Hydroxyglutaric acid is structurally similar to the excitatory amino acid glutamate and stimul... Tissue accumulation of high amounts of D 2 hydroxyglutaric acid is the biochemical hallmark of the inherited neurometabolic disorder D 2 hydroxyglutaric aciduria.
2-Phospho-D-glyceric acid
2-Phosphoglyceric acid (2PG), or 2-phosphoglycerate, is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate.; 2-Phosphoglyceric acid (2PGA) is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate. Enolase catalyzes the beta-elimination reaction in a stepwise manner wherein OH- is eliminated from C3 of a discrete carbanion (enolate) intermediate. This intermediate is created by removal of the proton from C2 of 2PGA by a base in the active site. (PMID: 8994873, Wikipedia). 2-Phosphoglycerate is found in rice. 2-Phospho-D-glycerate or 2PG is an intermediate in gluconeogenesis. It is a glyceric acid which serves as the substrate in the ninth step of glycolysis. 2PG is converted by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate. More specifically, 2PG can be generated from Glycerate-3-phosphate via phosphoglycerate mutase or from phosphoenolpyrvate via alpha enolase. KEIO_ID P029
2-Methylcitric acid
Methylcitric acid (MCA) is elevated in body fluids of patients with propionic acidaemia (PA; OMIM 232000, 232050), methylmalonic aciduria (MMA; OMIM 251000, 251120) and multiple carboxylase deficiency (OMIM 253260, 253270), which are inherited disorders. MCA is formed by condensation of accumulated propionyl- CoA and oxalacetate by the enzyme si-citrate synthase (EC 4.1.3.7). MCA molecule has two stereogenic centers so that it can occur in the form of four stereoisomers. Only two stereoisomers of MCA, (2S, 3S) and (2R, 3S), were found in human urine (PMID: 17295121). Methylcitric acid (MCA) is elevated in body fluids of patients with propionic acidaemia (PA; OMIM 232000, 232050), methylmalonic aciduria (MMA; OMIM 251000, 251120) and multiple carboxylase deficiency (OMIM 253260, 253270). MCA is formed by condensation of accumulated propionyl- CoA and oxalacetate by the enzyme si-citrate synthase (EC 4.1.3.7). MCA molecule has two stereogenic centers so that it can occur in the form of four stereoisomers. Only two stereoisomers of MCA, (2S, 3S) and (2R, 3S), were found in human urine. (PMID: 17295121) [HMDB] 2-Methylcitric acid (Methylcitric acid) is an endogenous metabolite in the 2-methylcitric acid cycle. 2-Methylcitric acid accumulates in methylmalonic and propionic acidemias and acts as a marker metabolite. 2-Methylcitric acid markedly inhibits ADP-stimulated and uncoupled respiration in mitochondria supported by glutamate[1]. 2-Methylcitric acid (Methylcitric acid) is an endogenous metabolite in the 2-methylcitric acid cycle. 2-Methylcitric acid accumulates in methylmalonic and propionic acidemias and acts as a marker metabolite. 2-Methylcitric acid markedly inhibits ADP-stimulated and uncoupled respiration in mitochondria supported by glutamate[1]. 2-Methylcitric acid (Methylcitric acid) is an endogenous metabolite in the 2-methylcitric acid cycle. 2-Methylcitric acid accumulates in methylmalonic and propionic acidemias and acts as a marker metabolite. 2-Methylcitric acid markedly inhibits ADP-stimulated and uncoupled respiration in mitochondria supported by glutamate[1].
2-Acetolactate
2-Acetolactate is involved in the butanoate metabolism and pantothenate and CoA biosynthesis pathways. In the butanoate metabolism pathway, 2-Acetolactate is created from 2-(alpha-Hydroxyethyl)thiamine diphosphate by acetolactate synthase [EC:2.2.1.6]. 2-Acetolactate is then converted to (R)-Acetoin by acetolactate decarboxylase [EC:4.1.1.5]. In the pantothenate and CoA pathway, 2-Acetolactate is irreversibly created from pyruvate by acetolactate synthase [EC:2.2.1.6]. 2-Acetolactate is then irreversibly converted to 2,3-Dihydroxy-3-methylbutanoate by ketol-acid reductoisomerase [EC:1.1.1.86]. 2-Acetolactate is involved in the butanoate metabolism and pantothenate and CoA biosynthesis pathways.
3-Hydroxyisobutyric acid
A 4-carbon, branched hydroxy fatty acid and intermediate in the metabolism of valine. 3-Hydroxyisobutyric acid is an important interorgan metabolite, an intermediate in the pathways of l-valine and thymine and a good gluconeogenic substrate.
13-Hydroxydocosanoic acid
A C22 hydroxy fatty acid with the hydroxy group at the 13-position and intermediate in the synthesis of sophorosyloxydocosanoate; a yeast glycolipid with potential medical and chemical engineering applications.
Cerebronic acid
Constituent of various glycosphingolipids of wheat, corn and other plant subspecies Cerebronic acid is found in peanut and cereals and cereal products. D-Cerebronic acid is found in mushrooms. D-Cerebronic acid is isolated from Polyporus umbellatus (zhu ling).
6-hydroxy-3,7-dimethyloctanoic acid
A hydroxy fatty acid that consists of caprylic acid bearing two additional methyl substituents at positions 3 and 7 as well as a hydroxy substituent at position 6.
3-Hydroxyisobutyric acid
(S)-3-Hydroxyisobutyric acid (3-HIBA) (CAS: 2068-83-9) is an organic acid. 3-HIBA is an intermediate in L-valine metabolism. 3-HIBA plays an important role in the diagnosis of the very rare inherited metabolic diseases 3-hydroxyisobutyric aciduria (OMIM: 236795) and methylmalonic semialdehyde dehydrogenase deficiency (OMIM: 603178). Patients with 3-hydroxyisobutyric aciduria excrete a significant amount of 3-HIBA not only during the acute stage but also when stable. 3-Hydroxyisobutyric aciduria is caused by a 3-hydroxyisobutyryl-CoA dehydrogenase deficiency (PMID: 18329219). The severity of this disease varies from case to case. Most patients exhibit dysmorphic features, such as a small triangular face, a long philtrum, low set ears, and micrognathia (PMID: 10686279). Lactic acidemia is also found in the affected patients, indicating that mitochondrial dysfunction is involved. 3-HIBA appears to specifically inhibit the function of the respiratory chain complex I-III and mitochondrial creatine kinase (PMID: 18329219). BioTransformer predicts that 3-HIBA is a product of 2-methylpropanoic acid metabolism via a hydroxylation-of-terminal-methyl reaction catalyzed by CYP2B6 and CYP2E1 enzymes (PMID: 30612223). (S)-3-Hydroxyisobutyric (3-HIBA) acid is an organic acid. 3-HIBA is an intermediate in the metabolic pathways of L-valine and L-thymine amino acids. 3-HIBA plays an important role in the diagnosis of the very rare inherited metabolic diseases 3-hydroxyisobutyric aciduria (OMIM 236795) and methylmalonic semialdehyde dehydrogenase deficiency (OMIM 603178). Patients with 3-hydroxyisobutyric aciduria excrete a significant amount of 3-HIBA not only during the acute stage but also when stable. The deficient enzyme in 3HiB-uria remains unclear. The severity of this disease varies from case to case. Most patients exhibit dysmorphic features, such as a small triangular face, a long philtrum, low set ears and micrognathia (PMID: 113770040, 10686279) [HMDB] 3-Hydroxyisobutyric acid is an important interorgan metabolite, an intermediate in the pathways of l-valine and thymine and a good gluconeogenic substrate.
Tartaric acid
Tartaric acid is a white crystalline organic acid. It occurs naturally in many plants, particularly grapes and tamarinds, and is one of the main acids found in wine. It is added to other foods to give a sour taste, and is used as an antioxidant. Salts of tartaric acid are known as tartrates. It is a dihydroxy derivative of dicarboxylic acid. Tartaric acid is a muscle toxin, which works by inhibiting the production of malic acid, and in high doses causes paralysis and death. The minimum recorded fatal dose for a human is about 12 grams. In spite of that, it is included in many foods, especially sour-tasting sweets. As a food additive, tartaric acid is used as an antioxidant with E number E334, tartrates are other additives serving as antioxidants or emulsifiers. Naturally-occurring tartaric acid is chiral, meaning that it has molecules that are non-superimposable on their mirror-images. It is a useful raw material in organic chemistry for the synthesis of other chiral molecules. The naturally occurring form of the acid is L-(+)-tartaric acid or dextrotartaric acid. The mirror-image (enantiomeric) form, levotartaric acid or D-(-)-tartaric acid, and the achiral form, mesotartaric acid, can be made artificially. Tartarate is believed to play a role in inhibiting kidney stone formation. Most tartarate that is consumed by humans is metabolized by bacteria in the gastrointestinal tract -- primarily in the large instestine. Only about 15-20\\\\\\% of consumed tartaric acid is secreted in the urine unchanged. Tartaric acid is a biomarker for the consumption of wine and grapes (PMID:24507823). Tartaric acid is also a fungal metabolite, elevated levels in the urine (especially in children) may be due to the presence of yeast (in the gut or bladder). It can be produced by Agrobacterium, Nocardia, Rhizobium, Saccharomyces as well (PMID:7628083) (https://link.springer.com/article/10.1023/A:1005592104426). High levels of tartaric acid have been found in autistic children. In adults, tartaric acid may be due to the consumption of wine (https://www.greatplainslaboratory.com/articles-1/2015/11/13/candida-and-overgrowth-the-problem-bacteria-by-products) (PMID:15738524; PMID:24507823; PMID:7628083). Present in many fruits, wines and coffee. Acidulant for beverages, foods and pharmaceuticals,used to enhance natural and synthetic fruit flavours, especies in grape- and lime-flavoured drinks and candies. Firming agent, humectant. It is used in leavening systems including baking powders. Stabiliising agent for ground spices and cheeses to prevent discoloration. Chelating agent in fatty foods. Synergist with antioxidants, pH control agent in milk, jams and jellies, moisture-control agent. *Metatartaric* acid (a mixture of polyesters obtained by the controlled dehydration of (+)-tartaric acid, together with unchanged (+)-tartaric acid) is permitted in wine in UK (+)-Tartaric acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=87-69-4 (retrieved 2024-07-01) (CAS RN: 87-69-4). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). DL-Tartaric acid is a non-racemic mixture of L- and D-tartaric acids with antioxidant activities[1][2]. L-Tartaric acid (L-(+)-Tartaric acid) is an endogenous metabolite. L-Tartaric acid is the primary nonfermentable soluble acid in grapes and the principal acid in wine. L-Tartaric acid can be used as a flavorant and antioxidant for a range of foods and beverages[1]. L-Tartaric acid (L-(+)-Tartaric acid) is an endogenous metabolite. L-Tartaric acid is the primary nonfermentable soluble acid in grapes and the principal acid in wine. L-Tartaric acid can be used as a flavorant and antioxidant for a range of foods and beverages[1].
Lactic acid
D-lactic acid, also known as D-lactate or D-2-hydroxypropanoic acid, belongs to alpha hydroxy acids and derivatives class of compounds. Those are organic compounds containing a carboxylic acid substituted with a hydroxyl group on the adjacent carbon. D-lactic acid is soluble (in water) and a weakly acidic compound (based on its pKa). D-lactic acid can be found in a number of food items such as tamarind, onion-family vegetables, allspice, and acerola, which makes D-lactic acid a potential biomarker for the consumption of these food products. D-lactic acid can be found primarily in blood, cerebrospinal fluid (CSF), and urine, as well as throughout most human tissues. D-lactic acid exists in all living species, ranging from bacteria to humans. In humans, D-lactic acid is involved in a couple of metabolic pathways, which include pyruvaldehyde degradation and pyruvate metabolism. D-lactic acid is also involved in several metabolic disorders, some of which include pyruvate kinase deficiency, pyruvate decarboxylase E1 component deficiency (PDHE1 deficiency), pyruvate dehydrogenase complex deficiency, and leigh syndrome. Moreover, D-lactic acid is found to be associated with diabetes mellitus type 2 and schizophrenia. D-lactic acid is a non-carcinogenic (not listed by IARC) potentially toxic compound. In animals, L-lactate is constantly produced from pyruvate via the enzyme lactate dehydrogenase (LDH) in a process of fermentation during normal metabolism and exercise. It does not increase in concentration until the rate of lactate production exceeds the rate of lactate removal, which is governed by a number of factors, including monocarboxylate transporters, concentration and isoform of LDH, and oxidative capacity of tissues. The concentration of blood lactate is usually 1–2 mmol/L at rest, but can rise to over 20 mmol/L during intense exertion and as high as 25 mmol/L afterward . Lactic acid is an organic acid. It is a chiral molecule, consisting of two optical isomers, L-lactic acid and D-lactic acid, with the L-isomer being the most common in living organisms. Lactic acid plays a role in several biochemical processes and is produced in the muscles during intense activity. D-Lactic acid is the end product of the enzyme glyoxalase II (or hydroxyacyl-glutathione hydrolase) (EC 3.1.2.6), which converts the intermediate substrate S-lactoyl-glutathione to reduced glutathione and D-lactate (OMIM: 138790). Lactic acid is a microbial metabolite found in Aerococcus, Bacillus, Carnobacterium, Corynebacterium, Enterococcus, Escherichia, Lactobacillus, Lactococcus, Leuconostoc, Oenococcus, Pediococcus, Rhizopus, Saccharomyces, Streptococcus, Tetragenococcus, Vagococcus and Weissella (PMID:26287368; PMID:26360870).
2-Keto-3-deoxy-6-phosphogluconic acid
2-Keto-3-deoxy-6-phosphogluconic acid is a substrate for Fructose-bisphosphate aldolase A. It can be found in Achromobacter, Alcaligenes, Clostridium and Rhodobacteraceae (PMID: 5383859; PMID: 5304016) (M. Szymona and M. Doudoroff. Carbohydrate Metabolism in Rhodopseudomonas spheroides. J. Gen. Microbiol (1960). 22: 167-183). 2-Keto-3-deoxy-6-phosphogluconic acid is a substrate for Fructose-bisphosphate aldolase A. [HMDB]
(S)-2-Acetolactate
(S)-2-Acetolactate is an intermediate in the biosynthesis of valine, leucine and isoleucine (KEGG ID C06010 ). It is the sixth to last step in the synthesis of protein and is converted from 2-hydroxy-3-methyl-2-oxobutanoate via the enzyme acetolactate synthase [EC:2.2.1.6]. It is then converted to 3-hydroxy-3-methyl-2-oxobutanoate via the enzyme ketol-acid reductoisomerase [EC:1.1.1.86]. [HMDB]. (S)-2-Acetolactate is found in many foods, some of which are chickpea, japanese persimmon, fruits, and star fruit. (S)-2-Acetolactate is an intermediate in the biosynthesis of valine, leucine and isoleucine (KEGG ID C06010 ). It is the sixth to last step in the synthesis of protein and is converted from 2-hydroxy-3-methyl-2-oxobutanoate via the enzyme acetolactate synthase [EC:2.2.1.6]. It is then converted to 3-hydroxy-3-methyl-2-oxobutanoate via the enzyme ketol-acid reductoisomerase [EC:1.1.1.86]. D018377 - Neurotransmitter Agents > D018847 - Opioid Peptides D018377 - Neurotransmitter Agents > D004399 - Dynorphins
2-hydroxystearate
2-Hydroxystearic acid (CAS: 629-22-1), also known as 2-hydroxystearate or 2-hydroxyoctadecanoic acid, is a member of the class of compounds known as long-chain fatty acids. Long-chain fatty acids are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. The chain of 2-hydroxystearic acid bears a hydroxyl group. 2-Hydroxystearic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 2-Hydroxystearic acid can be found in feces. 2-Hydroxystearic acid can be synthesized from octadecanoic acid, and can be synthesized into 2-hydroxystearoyl-CoA and N-2-hydroxystearoylsphingosine.
Mevalonic acid
A dihydroxy monocarboxylic acid comprising valeric acid having two hydroxy groups at the 3- and 5-positions together with a methyl group at the 3-position.
3-Hydroxyvaleric acid
3-Hydroxyvaleric acid is a 5-carbon ketone body. 3-Hydroxyvaleric acid is anaplerotic, meaning it can refill the pool of TCA cycle intermediates.
Erythronic acid
Erythronic acid is a sugar component of aqueous humour (eye). It may be derived from glycated proteins or from degradation of ascorbic acid. Erythronic acid is a normal organic acid present in a healthy adult and pediatric population. It has been found in urine, plasma, CSF, and synovial fluid (PMID: 14708889, 8087979, 8376520, 10420182). Erythronic acid is formed when N-acetyl-D-glucosamine (GlcNAc) is oxidized. GlcNAc is a constituent of hyaluronic acid (HA), a polysaccharide consisting of alternating units of glucuronic acid and GlcNAc, present as an aqueous solution in synovial fluid. In the synovial fluid of patients suffering from rheumatoid arthritis, HA is thought to be degraded either by radicals generated by Fenton chemistry (Fe2+/H2O2) or by NaOCl generated by myeloperoxidase (PMID: 10614067). Erythronic acid is a sugar component of aqueous humour (eye). It may be derived from glycated proteins or from degradation of ascorbic acid. Erythronic acid is a normal organic acid present in a healthy adult and pediatric population. It has been found in urine, plasma, CSF and synovial fluid. (PMID: 14708889, 8087979, 8376520, 10420182) Erythronic acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=13752-84-6 (retrieved 2024-07-10) (CAS RN: 13752-84-6). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).
2-Phosphoglyceric acid
2-Phosphoglyceric acid (2PGA) is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate. Enolase catalyzes the beta-elimination reaction in a stepwise manner wherein OH- is eliminated from C3 of a discrete carbanion (enolate) intermediate. This intermediate is created by removal of the proton from C2 of 2PGA by a base in the active site. (PMID: 8994873, Wikipedia) [HMDB] 2-Phosphoglyceric acid (2PGA) is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate. Enolase catalyzes the beta-elimination reaction in a stepwise manner wherein OH- is eliminated from C3 of a discrete carbanion (enolate) intermediate. This intermediate is created by removal of the proton from C2 of 2PGA by a base in the active site (PMID: 8994873, Wikipedia). 2-Phosphoglyceric acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=2553-59-5 (retrieved 2024-11-04) (CAS RN: 2553-59-5). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).
Avenic acid B
Avenic acid B is found in cereals and cereal products. Avenic acid B is a constituent of the roots of Avena sativa (oats). Constituent of the roots of Avena sativa (oats). Avenic acid B is found in oat and cereals and cereal products.
Ethoxyacetic acid
Ethoxyacetic acid is found in herbs and spices. Ethoxyacetic acid is a component of perilla leaf extract (Perilla frutescens Component of perilla leaf extract (Perilla frutescens). Ethoxyacetic acid is found in herbs and spices. Ethoxyacetic acid is an endogenous metabolite.
8-Hydroxyhexadecanoic acid
8-Hydroxyhexadecanoic acid is a hydroxy fatty acid. In humans, fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation.
11-Hydroxyhexadecanoic acid
11-Hydroxyhexadecanoic acid is a hydroxy fatty acid. In humans, fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation.
9-Hydroxydecanoic acid
9-Hydroxydecanoic acid is found in mushrooms. 9-Hydroxydecanoic acid is present in Agaricus campestris (field mushroom). Present in Agaricus campestris (field mushroom). 9-Hydroxydecanoic acid is found in mushrooms.
3-hydroxypentadecanoic acid
3-Hydroxypentadecanoic acid is a long-chain hydroxy fatty acid. In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation.
(R)-3-Hydroxydecanoic acid
In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation.(R)-3-Hydroxydecanoic acid is an intermediate in fatty acid biosynthesis. Specifically,(R)-3-Hydroxydecanoic acid is converted from 3-Oxodecanoic acid via two enzymes; fatty-acid Synthase and 3-oxoacyl- [acyl-carrier- protein] reductase.( EC:2.3.1.85 and EC:1.1.1.100) [HMDB] In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation.(R)-3-Hydroxydecanoic acid is an intermediate in fatty acid biosynthesis. Specifically,(R)-3-Hydroxydecanoic acid is converted from 3-Oxodecanoic acid via two enzymes; fatty-acid Synthase and 3-oxoacyl- [acyl-carrier- protein] reductase.( EC:2.3.1.85 and EC:1.1.1.100).
Sativic acid
Sativic acid, also known as sativate, is a member of the class of compounds known as long-chain fatty acids. Long-chain fatty acids are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Thus, sativic acid is considered to be an octadecanoid lipid molecule. Sativic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). Sativic acid can be found in rice, which makes sativic acid a potential biomarker for the consumption of this food product.
24-Hydroxytetracosanoic acid
24-hydroxytetracosanoic acid, also known as 24-hydroxylignoceric acid or omega-hydroxylignocerate, is a member of the class of compounds known as very long-chain fatty acids. Very long-chain fatty acids are fatty acids with an aliphatic tail that contains at least 22 carbon atoms. Thus, 24-hydroxytetracosanoic acid is considered to be a fatty acid lipid molecule. 24-hydroxytetracosanoic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 24-hydroxytetracosanoic acid can be found in potato, which makes 24-hydroxytetracosanoic acid a potential biomarker for the consumption of this food product.
18-hydroxyoleate
18-hydroxyoleate is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 18-hydroxyoleate can be found in a number of food items such as java plum, red bell pepper, oxheart cabbage, and apricot, which makes 18-hydroxyoleate a potential biomarker for the consumption of these food products.
Citric Acid
A - Alimentary tract and metabolism > A09 - Digestives, incl. enzymes > A09A - Digestives, incl. enzymes > A09AB - Acid preparations D064449 - Sequestering Agents > D002614 - Chelating Agents > D065096 - Calcium Chelating Agents D006401 - Hematologic Agents > D000925 - Anticoagulants C26170 - Protective Agent > C275 - Antioxidant COVID info from PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3]. Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3].
26-hydroxyhexacosanoic acid
The omega-hydroxy fatty acid obtained by hydroxylation at position 26 of hexacosanoic acid.
2-hydroxyglutaric acid
A 2-hydroxydicarboxylic acid that is glutaric acid in which one hydrogen alpha- to a carboxylic acid group is substituted by a hydroxy group.
lactic acid
G - Genito urinary system and sex hormones > G01 - Gynecological antiinfectives and antiseptics > G01A - Antiinfectives and antiseptics, excl. combinations with corticosteroids > G01AD - Organic acids 2-hydroxypropanoic acid, also known as lactic acid or lactate, belongs to alpha hydroxy acids and derivatives class of compounds. Those are organic compounds containing a carboxylic acid substituted with a hydroxyl group on the adjacent carbon. 2-hydroxypropanoic acid is soluble (in water) and a weakly acidic compound (based on its pKa). 2-hydroxypropanoic acid can be synthesized from propionic acid. 2-hydroxypropanoic acid is also a parent compound for other transformation products, including but not limited to, ethyl 2-hydroxypropanoate, 3-(imidazol-5-yl)lactic acid, and lactate ester. 2-hydroxypropanoic acid is an odorless tasting compound and can be found in a number of food items such as sunflower, potato, apple, and ginkgo nuts, which makes 2-hydroxypropanoic acid a potential biomarker for the consumption of these food products. 2-hydroxypropanoic acid is a drug which is used for use as an alkalinizing agent. In animals, L-lactate is constantly produced from pyruvate via the enzyme lactate dehydrogenase (LDH) in a process of fermentation during normal metabolism and exercise. It does not increase in concentration until the rate of lactate production exceeds the rate of lactate removal, which is governed by a number of factors, including monocarboxylate transporters, concentration and isoform of LDH, and oxidative capacity of tissues. The concentration of blood lactate is usually 1–2 mmol/L at rest, but can rise to over 20 mmol/L during intense exertion and as high as 25 mmol/L afterward . Lactate (Lactate acid) is the product of glycolysis. Lactate is produced by oxygen lack in contracting skeletal muscle in vivo, and can be removed under fully aerobic conditions. Lactate can be as a hemodynamic marker in the critically ill[1][2]. Lactate (Lactate acid) is the product of glycolysis. Lactate is produced by oxygen lack in contracting skeletal muscle in vivo, and can be removed under fully aerobic conditions. Lactate can be as a hemodynamic marker in the critically ill[1][2].
4-Hydroxybutyric acid
A 4-hydroxy monocarboxylic acid that is butyric acid in which one of the hydrogens at position 4 is replaced by a hydroxy group.
3-HYDROXYMYRISTIC ACID
A 3-hydroxy fatty acid that is tetradecanoic (myristic) acid substituted at position 3 by a hydroxy group
2-amino-3-(2,3-dihydroxypropoxy)-3-methylbutanoic acid
2-hydroxypentadecanoic acid
A 2-hydroxy fatty acid that is pentadecanoic acid substituted by a hydroxy group at position 2.
2-Hydroxyheptadecanoic acid
A 2-hydroxy fatty acid that is heptadecanoic acid (margaric acid) substituted by a hydroxy group at position 2.
2-Hydroxytricosanoic acid
A 2-hydroxy fatty acid that is tricosanoic acid substituted by a hydroxy group at position 2.
14-hydroxymyristic acid
A long-chain fatty acid that is myristic (tetradecanoic) acid substituted at position 14 by a hydroxy group.
2-hydroxyhenicosanoic acid
A 2-hydroxy fatty acid that is henicosanoic acid substituted by a hydroxy group at position 2.
2-Hydroxyheptanoic acid
A monohydroxy fatty acid that is heptanoic acid with a hydroxy group substituted at position C-2.
20-hydroxyicosanoic acid
An omega-hydroxy fatty acid that is icosanoic acid (arachidonic acid) in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group.
15-Hydroxypentadecanoic acid
An omega-hydroxy fatty acid that is pentadecanoic acid in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group.
2-hydroxypentacosanoic acid
A 2-hydroxy fatty acid that is pentacosanoic acid substituted by a hydroxy group at position 2.
21-hydroxyhenicosanoic acid
An omega-hydroxy fatty acid that is henicosanoic acid in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group.
Methyl citrate
2-Hydroxy-2-(2-methoxy-2-oxoethyl)butanedioic acid is a carbonyl compound. 2-Hydroxy-2-(2-methoxy-2-oxoethyl)butanedioic acid is a natural product found in Opuntia ficus-indica with data available. Methyl citrate is a Monoamine oxidase B (MAO-B) inhibitor (IC50=0.23 mM). Methyl citrate is isolated from the fruits of Opuntia ficus-indica var. saboten Makino[1].
L(+)-Tartaric acid
L-Tartaric acid (L-(+)-Tartaric acid) is an endogenous metabolite. L-Tartaric acid is the primary nonfermentable soluble acid in grapes and the principal acid in wine. L-Tartaric acid can be used as a flavorant and antioxidant for a range of foods and beverages[1]. L-Tartaric acid (L-(+)-Tartaric acid) is an endogenous metabolite. L-Tartaric acid is the primary nonfermentable soluble acid in grapes and the principal acid in wine. L-Tartaric acid can be used as a flavorant and antioxidant for a range of foods and beverages[1].
10-Hydroxydecanoate
10-Hydroxydecanoic acid (NSC 15139) is a saturated fatty acid of 10-hydroxy-trans-2-decenoic acid from royal jelly, with anti-inflammatory activity[1].
Citric Acid
Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3]. Citric acid is a natural preservative and food tartness enhancer. Citric acid induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid causes renal toxicity in mice[1][2][3].
GLYCERIC ACID
A trionic acid that consists of propionic acid substituted at positions 2 and 3 by hydroxy groups.
2-hydroxy-2-(2-methoxy-2-oxoethyl)butanedioic acid
3-Hydroxyisovaleric acid
A 3-hydroxy monocarboxylic acid that is isovaleric acid substituted at position 3 by a hydroxy group. Used as indicator of biotin deficiency. 3-Hydroxyisovaleric acid is a normal endogenous metabolite excreted in the urine. The urinary excretion of 3-hydroxyisovaleric acid is early and sensitive indicator of biotin deficiency[1][2]. 3-Hydroxyisovaleric acid is a normal endogenous metabolite excreted in the urine. The urinary excretion of 3-hydroxyisovaleric acid is early and sensitive indicator of biotin deficiency[1][2].
12-Hydroxydodecanoic acid
12-Hydroxydodecanoic acid is an endogenous metabolite.
6-HYDROXYCAPROIC ACID
An omega-hydroxy fatty acid comprising hexanoic acid having a hydroxy group at the 6-position.
10-Hydroxydecanoic acid
10-Hydroxydecanoic acid (NSC 15139) is a saturated fatty acid of 10-hydroxy-trans-2-decenoic acid from royal jelly, with anti-inflammatory activity[1].
2,4-Dihydroxybutanoic acid
A omega-hydroxy fatty acid that is butyric acid substituted by hydroxy groups at positions 2 and 4 respectively.
2-Phosphoglyceric acid
A monophosphoglyceric acid having the phospho group at the 2-position. 2-phosphoglyceric acid is a monophosphoglyceric acid having the phospho group at the 2-position. It is a monophosphoglyceric acid and a tetronic acid derivative. It is functionally related to a glyceric acid. It is a conjugate acid of a 2-phosphoglycerate(3-).
Omega-hydroxydodecanoate
12-Hydroxydodecanoic acid is an endogenous metabolite.
2-Hydroxymyristic acid
A derivative of myristic acid having a hydroxy substituent at C-2.
Jalapinolic acid
A hydroxypalmitic acid that is palmitic acid substituted by hydroxy group at position 11 (the 11S stereoisomer).
D-Threaric acid
DL-Tartaric acid is a non-racemic mixture of L- and D-tartaric acids with antioxidant activities[1][2].
ETHOXYACETIC ACID
Ethoxyacetic acid is an endogenous metabolite.
Ieodomycin A
A natural product found in Bacillus species.
9-HYDROXYNONANOIC ACID
An omega-hydroxy fatty acid that is nonanoic acid in which one of the hydrogens of the terminal methyl group is replaced by a hydroxy group. 9-hydroxynonanoic acid, also known as 9-hydroxy pelargonate or omega-hydroxynonanoate, belongs to medium-chain hydroxy acids and derivatives class of compounds. Those are hydroxy acids with a 6 to 12 carbon atoms long side chain. Thus, 9-hydroxynonanoic acid is considered to be a fatty acid lipid molecule. 9-hydroxynonanoic acid is slightly soluble (in water) and a weakly acidic compound (based on its pKa). 9-hydroxynonanoic acid can be synthesized from nonanoic acid. 9-hydroxynonanoic acid is also a parent compound for other transformation products, including but not limited to, oscr#10, (3R)-3,9-dihydroxynonanoic acid, and icos#10. 9-hydroxynonanoic acid can be found in potato, which makes 9-hydroxynonanoic acid a potential biomarker for the consumption of this food product.
2-Hydroxynonanoic acid
A monohydroxy fatty acid that is nonanoic acid with a hydroxy group substituted at position C-2.
(R)-2-hydroxypalmitic acid
Occurs in wool fat, which is used as a chewing gum softener.
2-Hydroxynonadecanoic acid
A 2-hydroxy fatty acid that is nonadecanoic acid substituted by a hydroxy group at position 2.
2-Hydroxyoctacosanoic acid
A 2-hydroxy fatty acid that is the 2-hydroxy derivative of octacosanoic acid.
(9R)-9-hydroxydecanoic acid
An (omega-1)-hydroxy fatty acid that is capric acid in which the 9-pro-R hydrogen is replaced by a hydroxy group.
2,2,4-Trihydroxybutanoic acid
A hydroxybutyric acid that is butyric acid substituted by hydroxy groups at positions 2, 2 and 4.
(3R)-3,10-dihydroxydecanoic acid
A dihydroxy monocarboxylic acid that is 10-hydroxydecanoic acid in which the pro-R hydrogen beta to the carboxy group is replaced by a hydroxy group.
Tartronic acid
A dicarboxylic acid that is malonic acid substituted by a hydroxy group at position 2.
2-acetyllactic acid
A derivative of butyric acid having methyl, hydroxy and oxo substituents at the 2-, 2- and 3-positions respectively.
2-Phospho-D-glyceric acid
A 2-phosphoglyceric acid in which the glyceric acid moiety has D (R) configuration.
5-Hydroxyvaleric Acid
An omega-hydroxy fatty acid consisting of pentanoic acid carrying a hydroxy group at C-5.
(2S)-2-hydroxy-2-methyl-3-oxobutanoic acid
D018377 - Neurotransmitter Agents > D018847 - Opioid Peptides D018377 - Neurotransmitter Agents > D004399 - Dynorphins
Cerebronic acid
A very long-chain hydroxy fatty acid composed of lignoceric acid having a 2-hydroxy substituent.
(S)-2-Hydroxystearic acid
An optically active form of 2-hydroxyoctadecanoic acid having (S)-configuration.
(R)-2-hydroxystearic acid
The (R)-enantiomer of 2-hydroxyoctadecanoic acid.
22-hydroxydocosanoic acid
An omega-hydroxy-long-chain fatty acid obtained by monohydroxylation of the terminal methyl group of docosanoic acid.
8-Hydroxyoctanoic acid
An omega-hydroxy fatty acid that is caprylic acid in which one of the hydrogens of the terminal methyl group is replaced by a hydroxy group.
3-Hydroxydecanoic acid
A medium-chain fatty acid that is decanoic acid substituted at position 3 by a hydroxy group. 3-Hydroxycapric acid is an inhibitor for mitotic progression.
2-hydroxyarachidic acid
A long-chain fatty acid that is arachidic (icosanoic) acid substituted at position 2 by a hydroxy group.
3-hydroxyicosanoic acid
A long-chain fatty acid that is icosanoic acid carrying a 3-hydroxy substituent.
17-hydroxymargaric acid
An omega-hydroxy fatty acid that is heptadecanoic acid (margaric acid) in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group.
18-hydroxystearic acid
An omega-hydroxy fatty acid that is stearic acid in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group.
(2S)-2-hydroxytetradecanoic acid
A 2-hydroxymyristic acid having 2S-configuration.
2-Hydroxypropanoic acid
A 2-hydroxy monocarboxylic acid that is propanoic acid in which one of the alpha-hydrogens is replaced by a hydroxy group.
2-Phosphinomethylmalic acid
A 2-hydroxydicarboxylic acid that is malic acid carrying an additional phosphinomethyl substituent at position 2.
9,10,18-Trihydroxyoctadecanoic acid
An omega-hydroxy fatty acid that is 18-hydroxyoctadecanoic acid carrying two additional hydroxy substituents at positions 9 and 10.
2,3-Dihydroxybutanedioic acid
A tetraric acid that is butanedioic acid substituted by hydroxy groups at positions 2 and 3.
3-Hydroxypentanoic acid
A short-chain fatty acid that is valeric acid in which one of the methylene hydrogens at position 3 has been replaced by a hydroxy group.
2-hydroxycerotic acid
A very long-chain fatty acid that is cerotic (hexacosanoic) acid substituted at position 2 by a hydroxy group.
