alpha-Ketobutyric acid
| α-Ketobutyric acid | |
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2-oxobutanoic acid |
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| Identifiers | |
| CAS number | 600-18-0  |
| PubChem | 58 |
| ChemSpider | 57 |
| DrugBank | DB04553 |
| KEGG | C00109 |
| MeSH | Alpha-ketobutyric+acid |
| ChEBI | CHEBI:30831 |
| ChEMBL | CHEMBL171246 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C4H6O3 |
| Molar mass | 102.089 g/mol |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
α-Ketobutyric acid is a product of the lysis of cystathionine.
It is also one of the degradation products of threonine, produced by the catabolism of the amino acid by threonine dehydratase. It is also produced by the degradation of homocysteine and the metabolism of methionine.
α-Ketobutyric acid is transported into the mitochondrial matrix, where it is converted to propionyl-CoA by Branched Chain Alpha Keto Acid Dehydrogenase Complex. Further mitochondrial reactions produce succinyl CoA. This is first through the enzyme mitochondria Propionyl-CoA Carboxylase with Biotin as a cofactor to produce S-methylmalonyl-CoA. This is subsequently converted to R-methylmalonyl-CoA by mitochondrial Methylmalonyl-CoA epimerase. Finally, mitochondrial Methylmalonyl-CoA Mutase with cofactor Adenosylcoalbamin produces succinyl-CoA which enters the citric acid cycle.[1]
[edit] Conversion in sotolon in French Vin jaune
Vin jaune is marked by the formation of sotolon from alpha-ketobutyric acid.[2][3]
[edit] See also
[edit] References
- ^ http://pathman.smpdb.ca/pathways/SMP00452/pathway?level=2
- ^ Optimal Conditions for the Formation of Sotolon from .alpha.-Ketobutyric Acid in the French "Vin Jaune". Pham Thu Thuy, Guichard Elisabeth, Schlich Pascal and Charpentier Claudine, J. Agric. Food Chem., 1995, 43 (10), pages 2616–2619, doi:10.1021/jf00058a012
- ^ Quantitative determination of sotolon in wines by high-performance liquid chromatography. E. Guichard, T. T. Pham and P. Etievant, Chromatographia, Volume 37, Numbers 9-10, pages 539-542, doi:10.1007/BF02275793
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