Classification Term: 2326
Medium-chain keto acids and derivatives (ontology term: CHEMONTID:0001415)
Keto acids with a 6 to 12 carbon atoms long side chain." []
found 45 associated metabolites at sub_class metabolite taxonomy ontology rank level.
Ancestor: Keto acids and derivatives
Child Taxonomies: There is no child term of current ontology term.
2-Oxoadipic acid
2-Oxoadipic acid is produced from lysine in the cytosol of cells via the saccharopine and the pipecolic acid pathways. Catabolites of hydroxylysine and tryptophan enter these pathways as 2-aminoadipic- -semialdehyde and 2-oxoadipate, respectively. In the matrix of mitochondria, 2-oxoadipate is decarboxylated to glutaryl-CoA by the 2-oxoadipate dehydrogenase complex and then converted to acetyl-CoA. 2-Oxoadipic aciduria is an in-born error of metabolism of lysine, tryptophan, and hydroxylysine, in which abnormal quantities of 2-aminoadipic acid are found in body fluids along with 2-oxoadipic acid. Patients with 2-Oxoadipic acidemias are mentally retarded with hypotonia or seizures. 2-Oxoadipic aciduria can occur in patients with Kearns-Sayre Syndrome, a progressive disorder with onset prior to 20 years of age in which multiple organ systems are affected, including progressive external ophthalmoplegia, retinopathy, and the age of onset, and these are associated classically with abnormalities in cardiac conduction, cerebellar signs, and elevated cerebrospinal fluid protein (PMID: 10655159, 16183823, 11083877). Oxoadipic acid is found to be associated with alpha-aminoadipic aciduria, which is an inborn error of metabolism. Present in pea seedlings KEIO_ID K009 Oxoadipic acid is a key metabolite of the essential amino acids tryptophan and lysine.
3-Oxoadipic acid
3-Oxoadipic acid is a regularly occurring Adipic dicarboxylic acid human metabolite found occasionally in biofluids of healthy individuals. (PMIDs 8340451, 1769109, 2338430) Increased amounts of 3-Oxoadipic acid are excreted after ingestion of Sebacic acid, supporting the hypothesis that dicarboxylic acids are degraded by ordinary beta-oxidation. (PMID 3220884) [HMDB] 3-Oxoadipic acid is a regularly occurring Adipic dicarboxylic acid human metabolite found occasionally in biofluids of healthy individuals. (PMIDs 8340451, 1769109, 2338430) Increased amounts of 3-Oxoadipic acid are excreted after ingestion of Sebacic acid, supporting the hypothesis that dicarboxylic acids are degraded by ordinary beta-oxidation. (PMID 3220884).
2-Ketohexanoic acid
2-Ketohexanoic acid is a potent insulin secretagogue (PMID 7045091). 2-Ketohexanoic acid directly inhibits the ATP-sensitive K+ channel (KATP channel) in pancreatic beta-cells (stimulated in isolated mouse islets), but it is unknown whether direct KATP channel inhibition contributes to insulin release by 2-ketohexanoic acid and related alpha-keto acid anions, which are generally believed to act via beta-cell metabolism (PMID 16014804). 2-Ketohexanoic acid is a potent insulin secretagogue. (PMID 7045091)
Maleylacetoacetic acid
Maleylacetoacetic acid, also known as 4-maleylacetoacetate, is an intermediate in the metabolism of tyrosine. Homogentisate 1,2-dioxygenase (HGD) is the enzyme which catalyzes the conversion of homogentisate into 4-maleylacetoacetate. HGD is involved in the catabolism of aromatic rings, more specifically in the breakdown of the amino acids tyrosine and phenylalanine.
3-Oxohexanoic acid
3-Oxohexanoic acid is fatty acid formed by the action of Fatty acid synthases from acetyl-CoA and malonyl-CoA precursors. This fatty acid is involved in fatty acid biosynthesis. Specifically, it is the product of reaction between malonic acid and three enznymes; beta-ketoacyl -acyl-carrier- protein synthase, fatty-acid Synthase, and beta- ketoacyl -acyl-carrier- protein synthase II. [HMDB] 3-Oxohexanoic acid is fatty acid formed by the action of Fatty acid synthases from acetyl-CoA and malonyl-CoA precursors. This fatty acid is involved in fatty acid biosynthesis. Specifically, it is the product of reaction between malonic acid and three enznymes; beta-ketoacyl -acyl-carrier- protein synthase, fatty-acid Synthase, and beta- ketoacyl -acyl-carrier- protein synthase II.
2-Maleylacetate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
3-Oxododecanoic acid
In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation. 3-Oxo-Dodecanoic acid is an intermediate in fatty acid biosynthesis. Specifically, 3-Oxo-Dodecanoic acid is converted form Malonic acid via three enzymes; 3-oxoacyl-[acyl-carrier-protein] synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier-protein synthase II. (EC:2.3.1.41, E.C: 2.3.1.85, 2.3.1.179) [HMDB] In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation. 3-Oxo-Dodecanoic acid is an intermediate in fatty acid biosynthesis. Specifically, 3-Oxo-Dodecanoic acid is converted form Malonic acid via three enzymes; 3-oxoacyl-[acyl-carrier-protein] synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier-protein synthase II. (EC:2.3.1.41, E.C: 2.3.1.85, 2.3.1.179).
2-Keto-6-aminocaproate
2-Keto-6-aminocaproate is an intermediate in lysine degradation and can be formed from L-lysine. L-Lysine is an essential amino-acid that is a necessary building block for all protein in the body. L-Lysine plays a major role in calcium absorption; building muscle protein; recovering from surgery or sports injuries; and the bodys production of hormones, enzymes, and antibodies. L-Lysine can be converted to 2-keto-6-aminocaproate via the enzyme L-lysine alpha-oxidase. 2-Keto-6-aminocaproate can spontaneously decarboxylate to 5-aminovalerate in the presence of the reaction product, hydrogen peroxide. It can also be spontaneously converted in solution to its cyclic form delta-piperideine-2-carboxylate. This has been demonstrated in vitro in the presence of catalase, which splits hydrogen peroxide. [HMDB] 2-Keto-6-aminocaproate is an intermediate in lysine degradation and can be formed from L-lysine. L-Lysine is an essential amino-acid that is a necessary building block for all protein in the body. L-Lysine plays a major role in calcium absorption; building muscle protein; recovering from surgery or sports injuries; and the bodys production of hormones, enzymes, and antibodies. L-Lysine can be converted to 2-keto-6-aminocaproate via the enzyme L-lysine alpha-oxidase. 2-Keto-6-aminocaproate can spontaneously decarboxylate to 5-aminovalerate in the presence of the reaction product, hydrogen peroxide. It can also be spontaneously converted in solution to its cyclic form delta-piperideine-2-carboxylate. This has been demonstrated in vitro in the presence of catalase, which splits hydrogen peroxide.
(S)-5-Amino-3-oxohexanoate
S)-5-Amino-3-oxohexanoate is an intermediate in lysine degradation. L-Lysine is an essential amino acid that is a necessary building block for all protein in the body and It plays a major role in calcium absorption; building muscle protein; recovering from surgery or sports injuries; and the bodys production of hormones, enzymes, and antibodies. In lysine degradation pathway, (S)-5-Amino-3-oxohexanoate is a substrate for the enzyme L-erythro-3,5-diaminohexanoate dehydrogenase (EC 1.4.1.11) and can be generated from L-erythro-3,5-Diaminohexanoate. [HMDB] (S)-5-Amino-3-oxohexanoate is an intermediate in lysine degradation. L-Lysine is an essential amino acid that is a necessary building block for all protein in the body and It plays a major role in calcium absorption; building muscle protein; recovering from surgery or sports injuries; and the bodys production of hormones, enzymes, and antibodies. In lysine degradation pathway, (S)-5-Amino-3-oxohexanoate is a substrate for the enzyme L-erythro-3,5-diaminohexanoate dehydrogenase (EC 1.4.1.11) and can be generated from L-erythro-3,5-Diaminohexanoate.
2-Keto-6-acetamidocaproate
2-Keto-6-acetamidocaproate is an intermediate in lysine degradation. It can be generated from N6-acetyl-L-lysine. N-acetyl-lysine is an acetylated amino acid. Post-translational lysine-acetylation is one of two major modifications of lysine residues in various proteins. Acetylation of specific lysine residues in the N-terminal domains of core histones is a biochemical marker of active genes. Acetylation is now known to play a major role in eukaryotic transcription. Specifically, acetyltransferase enzymes that act on particular lysine side chains of histones and other proteins are intimately involved in transcriptional activation. N6-acetyl-L-lysine can be converted to 2-Keto-6-acetamidocaproate via the enzyme N6-acetyllysine aminotransferase and then 2-keto-6-acetamidocaproate can be reduced enzymatically to 5-acetamidovalerate. [HMDB] 2-Keto-6-acetamidocaproate is an intermediate in lysine degradation. It can be generated from N6-acetyl-L-lysine. N-acetyl-lysine is an acetylated amino acid. Post-translational lysine-acetylation is one of two major modifications of lysine residues in various proteins. Acetylation of specific lysine residues in the N-terminal domains of core histones is a biochemical marker of active genes. Acetylation is now known to play a major role in eukaryotic transcription. Specifically, acetyltransferase enzymes that act on particular lysine side chains of histones and other proteins are intimately involved in transcriptional activation. N6-acetyl-L-lysine can be converted to 2-Keto-6-acetamidocaproate via the enzyme N6-acetyllysine aminotransferase and then 2-keto-6-acetamidocaproate can be reduced enzymatically to 5-acetamidovalerate.
2-Chloromaleylacetate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
2,5-Dichloro-4-oxohex-2-enedioate
C6H4Cl2O5 (225.94357940000003)
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
2,3,5-Trichloromaleylacetate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
2-Chloro-5-methylmaleylacetate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
3-Chloro-2-methylmaleylacetate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
3-Oxodecanoic acid
In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation. 3-Oxodecanoic acid is an intermediate in fatty acid biosynthesis. Specifically, 3-Oxodecanoic acid is converted from Malonic acid via three enzymes; 3-oxoacyl-[acyl-carrier-protein] synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier-protein synthase II. (EC:2.3.1.41, E.C: 2.3.1.85, 2.3.1.179) [HMDB] In humans fatty acids are predominantly formed in the liver and adipose tissue, and mammary glands during lactation. 3-Oxodecanoic acid is an intermediate in fatty acid biosynthesis. Specifically, 3-Oxodecanoic acid is converted from Malonic acid via three enzymes; 3-oxoacyl-[acyl-carrier-protein] synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier-protein synthase II. (EC:2.3.1.41, E.C: 2.3.1.85, 2.3.1.179).
4-Fumarylacetoacetic acid
4-Fumarylacetoacetic acid is an intermediate in the metabolism of tyrosine. Fumarylacetoacetate hydrolase (FAH) is an enzyme which catalyzes the hydrolysis of 4-fumarylacetoacetate into fumarate and acetoacetate. FAH is the last enzyme in the tyrosine catabolism pathway. FAH deficiency is associated with Type 1 hereditary tyrosinemia.
3-Fumarylpyruvate
This compound belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain
Succinylacetone
Succinylacetone, also known as 4,6-dioxoheptanoic acid or SUAC, belongs to the class of compounds known as medium-chain keto acids and derivatives. These are keto acids with 6 to 12 carbon atoms. Succinylacetone is soluble (in water) and a weakly acidic compound (based on its pKa). Succinylacetone has been detected in amniotic fluid, blood, and urine. Within the cell, succinylacetone is primarily located in the cytoplasm (predicted from logP). Succinylacetone can be created by the oxidation of glycine, and is a precursor of methylglyoxal (Wikipedia). Succinylacetone is an abnormal tyrosine metabolite that arises from defects in the enzyme called fumarylacetoacetase (PMID: 16448836). Fumarylacetoacetase normally catalyzes the hydrolysis of 4-fumarylacetoacetate into fumarate and acetoacetate. If present in sufficiently high levels, succinylacetone can act as an acidogen, an oncometabolite, and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. An oncometabolite is an endogenous metabolite that causes cancer. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of succinylacetone are associated with tyrosinemia type I. Type I tyrosinemia is an inherited metabolism disorder due to a shortage of the enzyme fumarylacetoacetate hydrolase that is needed to break down tyrosine. Patients usually develop features such as hepatic necrosis, renal tubular injury, and hypertrophic cardiomyopathy. Neurologic and dermatologic manifestations are also possible. The urine has an odour of cabbage or rancid butter. Succinylacetone is a keto-acid, which is a subclass of organic acids. 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 untreated tyrosinemia. Many affected children with organic acidemias experience intellectual disability or delayed development. Succinylacetone appears to function as an oncometabolite (similar in function to succinate, another oncometabolite) as patients with high levels of this compound often develop hepatocellular carcinoma (PMID: 20003495). Succinylacetone is a tyrosine metabolite (PMID 16448836). It is a specific marker for Tyrosinemia type I. Type I tyrosinemia is an inherited metabolism disorder due to a shortage of the enzyme fumarylacetoacetate hydrolase that is needed to break down tyrosine. [HMDB] D004791 - Enzyme Inhibitors 4,6-Dioxoheptanoic acid is a potent inhibitor of heme biosynthesis.
Achimilic acid
Achimillic acid C is found in herbs and spices. Achimillic acid C is a constituent of Achillea millefolium (yarrow). Constituent of Achillea millefolium (yarrow). Achimillic acid B is found in herbs and spices.
Alpha-Ketooctanoic acid
alpha-Ketooctanoic acid is a branched-chain alpha-keto acid. Branched-chain alpha-keto acids are the intermediate metabolites of branched-chain amino acids. Changes in the blood levels of these alpha-keto acids may indicate disturbances in the metabolism of the original substrates. Therefore the analysis of these alpha-keto acids in the blood may offer important information on the biochemical effects of alcohol in the body. [HMDB] alpha-Ketooctanoic acid is a branched-chain alpha-keto acid. Branched-chain alpha-keto acids are the intermediate metabolites of branched-chain amino acids. Changes in the blood levels of these alpha-keto acids may indicate disturbances in the metabolism of the original substrates. Therefore the analysis of these alpha-keto acids in the blood may offer important information on the biochemical effects of alcohol in the body.
3-Oxooctanoic acid
3-Oxo-Octanoic acid is fatty acid formed by the action of acid synthases from acetyl-CoA and malonyl-CoA precursors. It is involved in the fatty acid biosynthesis. Specifically, it is the product of reaction between malonic acid and three enzymes; beta-ketoacyl-acyl-carrier- protein synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier- protein synthase II. [HMDB] 3-Oxo-Octanoic acid is fatty acid formed by the action of acid synthases from acetyl-CoA and malonyl-CoA precursors. It is involved in the fatty acid biosynthesis. Specifically, it is the product of reaction between malonic acid and three enzymes; beta-ketoacyl-acyl-carrier- protein synthase, fatty-acid Synthase and beta-ketoacyl -acyl-carrier- protein synthase II.
Phaseolic acid
Phaseolic acid is found in pulses. Phaseolic acid is isolated from dry bean seeds (Phaseolus sp. Isolated from dry bean seeds (Phaseolus species). Phaseolic acid is found in pulses.
Polyethylene, oxidized
Polyethylene, oxidized is used as a food additive [EAFUS] ("EAFUS: Everything Added to Food in the United States. [http://www.eafus.com/]")
2-Hydroxy-2-(2-oxopropyl)butanedioic acid
2-Hydroxy-2-(2-oxopropyl)butanedioic acid belongs to the family of Medium-chain Keto Acids and Derivatives. These are keto acids with a 6 to 12 carbon atoms long side chain.
N-Lactoylisoleucine
N-Lactoylisoleucine is a lactoyl derivative of phenylalanine. N-Lactoyl-amino acids are ubiquitous pseudodipeptides of lactic acid and amino acids that are rapidly formed by reverse proteolysis. A protease, cytosolic nonspecific dipeptidase 2 (CNDP2), catalyzes their formation. The plasma levels of these metabolites strongly correlate with plasma levels of lactate and amino acid (PMID: 25964343).
4-fumarylacetoacetate(2-)
4-fumarylacetoacetate(2-) is also known as 4-Fumarylacetoacetic acid dianion. 4-fumarylacetoacetate(2-) is considered to be slightly soluble (in water) and acidic
Succinylacetoacetate
Succinylacetoacetate is an intermediate that arises due to the incomplete breakdown of tyrosine (PMID: 7171740). It is produced as a result of defects in the enzyme called fumarylacetoacetase. Fumarylacetoacetase normally catalyzes the hydrolysis of 4-fumarylacetoacetate into fumarate and acetoacetate. If present in sufficiently high levels, succinylacetoacetate can act as an acidogen, an oncometabolite, and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. An oncometabolite is an endogenous metabolite that causes cancer. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of succinylacetoacetate are associated with tyrosinemia type I. Type I tyrosinemia is an inherited metabolic disorder due to a shortage of the enzyme fumarylacetoacetate hydrolase that is needed to break down tyrosine. Patients usually develop features such as hepatic necrosis, renal tubular injury, and hypertrophic cardiomyopathy. Neurologic and dermatologic manifestations are also possible as well as hepatocellular carcinoma. The urine of tyrosinemia patients has an odour of cabbage or rancid butter. Succinylacetoacetate 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 untreated tyrosinemia. Many affected children with organic acidemias experience intellectual disability or delayed development. Succinylacetoacetate appears to function as an oncometabolite (similar in function to succinate, another oncometabolite) as patients with high levels of this compound often develop hepatocellular carcinoma (PMID: 20003495).
Octenoyl-L-carnitine
Octenoyl-L-carnitine is an acylcarnitine. More specifically, it is an octenoic acid ester of carnitine. Acylcarnitines were first discovered more than 70 year ago (PMID: 13825279). It is believed that there are more than 1000 types of acylcarnitines in the human body. The general role of acylcarnitines is to transport acyl-groups (organic acids and fatty acids) from the cytoplasm into the mitochondria so that they can be broken down to produce energy. This process is known as beta-oxidation. According to a recent review [Dambrova et al. 2021, Physiological Reviews], acylcarnitines (ACs) can be classified into 9 different categories depending on the type and size of their acyl-group: 1) short-chain ACs; 2) medium-chain ACs; 3) long-chain ACs; 4) very long-chain ACs; 5) hydroxy ACs; 6) branched chain ACs; 7) unsaturated ACs; 8) dicarboxylic ACs and 9) miscellaneous ACs. Short-chain ACs have acyl-groups with two to five carbons (C2-C5), medium-chain ACs have acyl-groups with six to thirteen carbons (C6-C13), long-chain ACs have acyl-groups with fourteen to twenty once carbons (C14-C21) and very long-chain ACs have acyl groups with more than 22 carbons. Octenoyl-L-carnitine is therefore classified as a medium chain AC. As a medium-chain acylcarnitine Octenoyl-L-carnitine is somewhat less abundant than short-chain acylcarnitines. These are formed either through esterification with L-carnitine or through the peroxisomal metabolism of longer chain acylcarnitines (PMID: 30540494). Many medium-chain acylcarnitines can serve as useful markers for inherited disorders of fatty acid metabolism. Carnitine octanoyltransferase (CrOT, EC:2.3.1.137) is responsible for the synthesis of all medium-chain (MCAC, C5-C12) and medium-length branched-chain acylcarnitines in peroxisomes (PMID: 10486279). The study of acylcarnitines is an active area of research and it is likely that many novel acylcarnitines will be discovered in the coming years. It is also likely that many novel roles in health and disease will be uncovered. An excellent review of the current state of knowledge for acylcarnitines is available at [Dambrova et al. 2021, Physiological Reviews].
3-Hydroxy-3-methylglutarylcarnitine
C20H36N2O9 (448.24206860000004)
Methylglutarylcarnitine
2-keto-3-deoxy-L-rhamnonate
2-keto-3-deoxy-l-rhamnonate, also known as kdr or 2-dehydro-3,6-dideoxy-L-mannonate, belongs to medium-chain keto acids and derivatives class of compounds. Those are keto acids with a 6 to 12 carbon atoms long side chain. 2-keto-3-deoxy-l-rhamnonate is soluble (in water) and a weakly acidic compound (based on its pKa). 2-keto-3-deoxy-l-rhamnonate can be found in a number of food items such as red beetroot, evergreen huckleberry, winter squash, and pepper (c. pubescens), which makes 2-keto-3-deoxy-l-rhamnonate a potential biomarker for the consumption of these food products.
2-oxo-6-methylthiohexanoate
2-oxo-6-methylthiohexanoate, also known as 6-(methylthio)-2-oxohexanoic acid, belongs to medium-chain keto acids and derivatives class of compounds. Those are keto acids with a 6 to 12 carbon atoms long side chain. 2-oxo-6-methylthiohexanoate is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 2-oxo-6-methylthiohexanoate can be found in a number of food items such as soursop, nance, turmeric, and strawberry guava, which makes 2-oxo-6-methylthiohexanoate a potential biomarker for the consumption of these food products.
4-maleyl-acetoacetate
4-maleyl-acetoacetate is slightly soluble (in water) and a moderately acidic compound (based on its pKa). 4-maleyl-acetoacetate can be found in a number of food items such as grass pea, vanilla, burdock, and pomegranate, which makes 4-maleyl-acetoacetate a potential biomarker for the consumption of these food products.