Page last updated: 2024-10-06

Leucine, isoleucine and valine metabolism

Proteins (24)

ProteinSynonymsTaxonomy
Branched-chain-amino-acid aminotransferase, mitochondrialBCAT(m); EC 2.6.1.42; Placental protein 18; PP18Homo sapiens (human)
3-hydroxyacyl-CoA dehydrogenase type-2 EC 1.1.1.35; 17-beta-estradiol 17-dehydrogenase; 1.1.1.62; 2-methyl-3-hydroxybutyryl-CoA dehydrogenase; MHBD; 3-alpha-(17-beta)-hydroxysteroid dehydrogenase (NAD(+)); 1.1.1.239; 3-hydroxy-2-methylbutyryl-CoA dehydrogenase; 1.1.1.178; 3-hydroxyacyl-CoA dehHomo sapiens (human)
Malonate--CoA ligase ACSF3, mitochondrialEC 6.2.1.n3; Acyl-CoA synthetase family member 3Homo sapiens (human)
Enoyl-CoA hydratase, mitochondrialEC 4.2.1.17; Enoyl-CoA hydratase 1; Short-chain enoyl-CoA hydratase; SCEHHomo sapiens (human)
Malonyl-CoA decarboxylase, mitochondrialMCD; EC 4.1.1.9Homo sapiens (human)
Propionyl-CoA carboxylase alpha chain, mitochondrialPCCase subunit alpha; EC 6.4.1.3; Propanoyl-CoA:carbon dioxide ligase subunit alphaHomo sapiens (human)
Propionyl-CoA carboxylase beta chain, mitochondrialPCCase subunit beta; EC 6.4.1.3; Propanoyl-CoA:carbon dioxide ligase subunit betaHomo sapiens (human)
Branched-chain-amino-acid aminotransferase, cytosolicBCAT(c); EC 2.6.1.42; Protein ECA39Homo sapiens (human)
3-hydroxyisobutyrate dehydrogenase, mitochondrialHIBADH; EC 1.1.1.31Homo sapiens (human)
Acetyl-CoA acetyltransferase, mitochondrialEC 2.3.1.9; Acetoacetyl-CoA thiolase; T2Homo sapiens (human)
3-hydroxyisobutyryl-CoA hydrolase, mitochondrialEC 3.1.2.4; 3-hydroxyisobutyryl-coenzyme A hydrolase; HIB-CoA hydrolase; HIBYL-CoA-HHomo sapiens (human)
Lipoamide acyltransferase component of branched-chain alpha-keto acid dehydrogenase complex, mitochondrialEC 2.3.1.168; 52 kDa mitochondrial autoantigen of primary biliary cirrhosis; Branched chain 2-oxo-acid dehydrogenase complex component E2; BCOADC-E2; Branched-chain alpha-keto acid dehydrogenase complex component E2; BCKAD-E2; BCKADE2; Dihydrolipoamide acHomo sapiens (human)
Dihydrolipoyl dehydrogenase, mitochondrialEC 1.8.1.4; Dihydrolipoamide dehydrogenase; Glycine cleavage system L proteinHomo sapiens (human)
Isovaleryl-CoA dehydrogenase, mitochondrial IVD; EC 1.3.8.4; Butyryl-CoA dehydrogenase; 1.3.8.1Homo sapiens (human)
Methylmalonyl-CoA mutase, mitochondrialMCM; EC 5.4.99.2; Methylmalonyl-CoA isomeraseHomo sapiens (human)
Methylcrotonoyl-CoA carboxylase subunit alpha, mitochondrialMCCase subunit alpha; EC 6.4.1.4; 3-methylcrotonyl-CoA carboxylase 1; 3-methylcrotonyl-CoA carboxylase biotin-containing subunit; 3-methylcrotonyl-CoA:carbon dioxide ligase subunit alphaHomo sapiens (human)
Methylcrotonoyl-CoA carboxylase beta chain, mitochondrialMCCase subunit beta; EC 6.4.1.4; 3-methylcrotonyl-CoA carboxylase 2; 3-methylcrotonyl-CoA carboxylase non-biotin-containing subunit; 3-methylcrotonyl-CoA:carbon dioxide ligase subunit betaHomo sapiens (human)
2-oxoisovalerate dehydrogenase subunit alpha, mitochondrialEC 1.2.4.4; Branched-chain alpha-keto acid dehydrogenase E1 component alpha chain; BCKDE1A; BCKDH E1-alphaHomo sapiens (human)
2-oxoisovalerate dehydrogenase subunit beta, mitochondrialEC 1.2.4.4; Branched-chain alpha-keto acid dehydrogenase E1 component beta chain; BCKDE1B; BCKDH E1-betaHomo sapiens (human)
Methylmalonate-semialdehyde dehydrogenase [acylating], mitochondrialMMSDH; Malonate-semialdehyde dehydrogenase [acylating]; EC 1.2.1.18; EC 1.2.1.27; Aldehyde dehydrogenase family 6 member A1Homo sapiens (human)
Short/branched chain specific acyl-CoA dehydrogenase, mitochondrialSBCAD; EC 1.3.8.5; 2-methyl branched chain acyl-CoA dehydrogenase; 2-MEBCAD; 2-methylbutyryl-coenzyme A dehydrogenase; 2-methylbutyryl-CoA dehydrogenaseHomo sapiens (human)
Methylglutaconyl-CoA hydratase, mitochondrialEC 4.2.1.18; AU-specific RNA-binding enoyl-CoA hydratase; AU-binding protein/enoyl-CoA hydratase; Itaconyl-CoA hydratase; 4.2.1.56Homo sapiens (human)
3-hydroxy-3-methylglutaryl-CoA lyase, cytoplasmicEC 4.1.3.4; 3-hydroxy-3-methylglutaryl-CoA lyase-like protein 1; HMGCL-like 1; Endoplasmic reticulum 3-hydroxy-3-methylglutaryl-CoA lyase; er-cHLHomo sapiens (human)
Isobutyryl-CoA dehydrogenase, mitochondrialIBDH; EC 1.3.8.-; Activator-recruited cofactor 42 kDa component; ARC42; Acyl-CoA dehydrogenase family member 8; ACAD-8Homo sapiens (human)

Compounds (44)

CompoundDescription
ValineA branched-chain essential amino acid that has stimulant activity. It promotes muscle growth and tissue repair. It is a precursor in the penicillin biosynthetic pathway.
biotinA water-soluble, enzyme co-factor present in minute amounts in every living cell. It occurs mainly bound to proteins or polypeptides and is abundant in liver, kidney, pancreas, yeast, and milk.
succinyl-coenzyme A
methacrylyl-coenzyme A
3-methylglutarylcarnitinediagnostic metabolite of 3-hydroxy-3-methylglutaryl-coenzyme A lyase deficiency; structure given in first source
propionylcarnitineRN given refers to cpd without isomeric designation
n-isobutyrylglycinefound in urine of patients with glyceric acidemia
ethylmalonic aciddon't confuse with diethyl malonate, which is a diester
4-hydroxyisopentanoate
S-(2-carboxypropyl)cysteamineamino acid found in man; may cause multiple abnormalities
isovalerylglucuronidemetabolite in urine of patients with isovaleric acidemia
beta-methylcrotonylglycinestructure
2-methyl-3-hydroxybutyrate
2-methylbutyrylglycinemetabolite of L-isoleucine
beta-alanineAn amino acid formed in vivo by the degradation of dihydrouracil and carnosine. Since neuronal uptake and neuronal receptor sensitivity to beta-alanine have been demonstrated, the compound may be a false transmitter replacing GAMMA-AMINOBUTYRIC ACID. A rare genetic disorder, hyper-beta-alaninemia, has been reported.
isobutyryl-coenzyme a
2-keto-4-methylvalerate
3-Hydroxybutyrate
2-oxo-3-methylvalerate
methylmalonic acidA malonic acid derivative which is a vital intermediate in the metabolism of fat and protein. Abnormalities in methylmalonic acid metabolism lead to methylmalonic aciduria. This metabolic disease is attributed to a block in the enzymatic conversion of methylmalonyl CoA to succinyl CoA.
alpha-keto-isovaleric acid
n-isovalerylglycineurinary metabolite of isovaleric acid in isovaleric acidemia (sweaty feet syndrome)
leucineAn essential branched-chain amino acid important for hemoglobin formation.
isoleucineAn essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of LEUCINE. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels.
3-methylbutyrylcarnitineaffects 2-oxo acid dehydrogenase activity in intact mitochondria of rat muscle; RN given refers to (R)-isomer
malonyl coenzyme aA coenzyme A derivative which plays a key role in the fatty acid synthesis in the cytoplasmic and microsomal systems.
tiglylglycineRN is from 9th CI
tiglyl-coenzyme a
hydracrylic acid
acetoacetate
LeucineAn essential branched-chain amino acid important for hemoglobin formation.
malonic acid
N-propionylglycine
isovaleric acidstructure
2-methylacetoacetic acid
2-ethylhydracrylic acidnewly described urinary organic acid; a metabolite of L-isoleucine; structure
2-hydroxy-3-methylbutyratestructure in first source
Acetyl Coenzyme AAcetyl CoA participates in the biosynthesis of fatty acids and sterols, in the oxidation of fatty acids and in the metabolism of many amino acids. It also acts as a biological acetylating agent.
2-methylacetoacetyl-coenzyme A
isovaleryl-coenzyme A
propionyl-coenzyme ARN given refers to parent cpd
3-aminoisobutyric acidRN given refers to cpd without isomeric designation
malonate
Alloisoleucine