Record Information
Version 1.0
Update Date 1/22/2018 12:54:54 PM
Metabolite IDPAMDB000004
Name: a-Ketoisovaleric acid
Description:a-Ketoisovaleric acid is a precursor of valine, leucine and pantothenate. It can be synthesized in Pseudomonas aeruginosa. anabolically (via dihydroxyacid dehydrase) and catabolically (branched-chain amino acid transaminase and alanine-valine transaminase)
  • 2-Keto-3-Methylbutyrate
  • 2-Keto-3-Methylbutyric acid
  • 2-Ketoisovalerate
  • 2-Ketoisovaleric acid
  • 2-Oxo-3-methylbutanoate
  • 2-Oxo-3-methylbutanoic acid
  • 2-Oxo-3-methylbutyrate
  • 2-Oxo-3-methylbutyric acid
  • 2-Oxoisovalerate
  • 2-Oxoisovaleric acid
  • 3-Methyl-2-oxo-Butanoate
  • 3-Methyl-2-oxo-Butanoic acid
  • 3-Methyl-2-oxo-Butyrate
  • 3-Methyl-2-oxo-Butyric acid
  • 3-Methyl-2-oxobutanoate
  • 3-Methyl-2-oxobutanoic acid
  • 3-Methyl-2-oxobutyrate
  • 3-Methyl-2-oxobutyric acid
  • A-Keto-b-Methylbutyrate
  • a-Keto-b-Methylbutyric acid
  • A-Keto-Isovalerate
  • a-Keto-Isovaleric acid
  • A-Ketoisovalerate
  • A-Oxo-b-methylbutyrate
  • a-Oxo-b-methylbutyric acid
  • A-Oxoisovalerate
  • a-Oxoisovaleric acid
  • alpha-Ketoisovalerate
  • alpha-Ketoisovaleric acid
  • Dimethylpyruvate
  • Dimethylpyruvic acid
  • Isopropylglyoxylate
  • Isopropylglyoxylic acid
  • Ketovaline
  • α-Ketoisovalerate
  • α-Ketoisovaleric acid
Chemical Formula: C5H8O3
Average Molecular Weight: 116.1152
Monoisotopic Molecular Weight: 116.047344122
CAS number: 759-05-7
IUPAC Name:3-methyl-2-oxobutanoic acid
Traditional IUPAC Name: α-ketoisovalerate
Chemical Taxonomy
Taxonomy DescriptionThis compound belongs to the class of organic compounds known as short-chain keto acids and derivatives. These are keto acids with an alkyl chain the contains less than 6 carbon atoms.
Kingdom Organic compounds
Super ClassOrganic acids and derivatives
Class Keto acids and derivatives
Sub ClassShort-chain keto acids and derivatives
Direct Parent Short-chain keto acids and derivatives
Alternative Parents
  • Methyl-branched fatty acid
  • Short-chain keto acid
  • Branched fatty acid
  • Fatty acyl
  • Alpha-keto acid
  • Alpha-hydroxy ketone
  • Ketone
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Organooxygen compound
  • Carbonyl group
  • Aliphatic acyclic compound
Molecular Framework Aliphatic acyclic compounds
External Descriptors
Physical Properties
State: Solid
Melting point: 31.5 °C
Experimental Properties:
Water Solubility:0.1 g/mL MeOH hot clearPhysProp
Predicted Properties
Water Solubility30.2 mg/mLALOGPS
pKa (Strongest Acidic)3.37ChemAxon
pKa (Strongest Basic)-9.7ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area54.37 Å2ChemAxon
Rotatable Bond Count2ChemAxon
Refractivity27.19 m3·mol-1ChemAxon
Polarizability11.04 Å3ChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations: Cytoplasm
Spectrum TypeDescriptionSplash Key
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies)splash10-000i-9500000000-ff936b879a69b5d118f8View in MoNA
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies)splash10-000i-8920000000-e37b37d64d43dcf763f0View in MoNA
GC-MSGC-MS Spectrum - GC-MS (1 MEOX; 1 TMS)splash10-000i-9400000000-e3995acc4818a98d0f48View in MoNA
GC-MSGC-MS Spectrum - GC-MS (1 MEOX; 1 TMS)splash10-0f79-9720000000-5d89487273e44ea61a68View in MoNA
GC-MSGC-MS Spectrum - GC-MSNot Available
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-000i-9000000000-10ab58a33e9ca7dbace0View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-000i-9000000000-ad51ff01c94b6046ad64View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-014i-0900000000-9993174a7b1801b90ddbView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-00xr-9500000000-293818b81e0879b6feb2View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-00di-9000000000-75058f27a2178b9cf121View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0006-9000000000-4c20af39e8ee009d5278View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00r2-9400000000-21f8c3fae79161c82099View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00dl-9000000000-5f25e41413738bb6b5d7View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-9000000000-801af00dea93fcfd637dView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-01b9-8900000000-5185c7dfc72c25069904View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-00xs-9200000000-7e2a275a65197f96f5d7View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0600-9000000000-0013e0ff06f9896a1337View in MoNA
1D NMR1H NMR SpectrumNot Available
1D NMR1H NMR SpectrumNot Available
1D NMR13C NMR SpectrumNot Available
2D NMR[1H,13C] 2D NMR SpectrumNot Available
2D NMR[1H,1H] 2D NMR SpectrumNot Available
  • Chuang DT, Niu WL, Cox RP: Activities of branched-chain 2-oxo acid dehydrogenase and its components in skin fibroblasts from normal and classical-maple-syrup-urine-disease subjects. Biochem J. 1981 Oct 15;200(1):59-67. Pubmed: 6895847
  • Gallina DL, Dominguez JM, Hoschoian JC, Barrio JR: Maintenance of nitrogen balance in a young woman by substitution of -ketoisovaleric acid for valine. J Nutr. 1971 Sep;101(9):1165-7. Pubmed: 5096137
  • Kanehisa, M., Goto, S., Sato, Y., Furumichi, M., Tanabe, M. (2012). "KEGG for integration and interpretation of large-scale molecular data sets." Nucleic Acids Res 40:D109-D114. Pubmed: 22080510
  • Lee SH, Kim SO, Chung BC: Gas chromatographic-mass spectrometric determination of urinary oxoacids using O-(2,3,4,5,6-pentafluorobenzyl)oxime-trimethylsilyl ester derivatization and cation-exchange chromatography. J Chromatogr B Biomed Sci Appl. 1998 Nov 20;719(1-2):1-7. Pubmed: 9869358
  • Livesey G, Lund P: Binding of branched-chain 2-oxo acids to bovine serum albumin. Biochem J. 1982 Apr 15;204(1):265-72. Pubmed: 7115325
  • Schaefer K, von Herrath D, Erley CM, Asmus G: Calcium ketovaline as new therapy for uremic hyperphosphatemia. Miner Electrolyte Metab. 1990;16(6):362-4. Pubmed: 2089249
  • Schauder P, Schroder K, Langenbeck U: Serum branched-chain amino and keto acid response to a protein-rich meal in man. Ann Nutr Metab. 1984;28(6):350-6. Pubmed: 6393856
  • Shigematsu Y, Kikuchi K, Momoi T, Sudo M, Kikawa Y, Nosaka K, Kuriyama M, Haruki S, Sanada K, Hamano N, et al.: Organic acids and branched-chain amino acids in body fluids before and after multiple exchange transfusions in maple syrup urine disease. J Inherit Metab Dis. 1983;6(4):183-9. Pubmed: 6422161
  • Shoemaker JD, Elliott WH: Automated screening of urine samples for carbohydrates, organic and amino acids after treatment with urease. J Chromatogr. 1991 Jan 2;562(1-2):125-38. Pubmed: 2026685
  • Tsuchiya H, Hashizume I, Tokunaga T, Tatsumi M, Takagi N, Hayashi T: High-performance liquid chromatography of alpha-keto acids in human saliva. Arch Oral Biol. 1983;28(11):989-92. Pubmed: 6581765
  • Winder, C. L., Dunn, W. B., Schuler, S., Broadhurst, D., Jarvis, R., Stephens, G. M., Goodacre, R. (2008). "Global metabolic profiling of Escherichia coli cultures: an evaluation of methods for quenching and extraction of intracellular metabolites." Anal Chem 80:2939-2948. Pubmed: 18331064
  • Yurtsever D. (2007). Fatty acid methyl ester profiling of Enterococcus and Esherichia coli for microbial source tracking. Thesis. Villanova University: U.S.A
Synthesis Reference: Bouveault, L. etal., Bull. Soc. Chim. Fr., 1901, 1031; Singh, J. etal., Org. Prep. Proced. Int., 1989, 21, 501; Hata, H. etal., Synthesis, 1991, 289
Material Safety Data Sheet (MSDS) Download (PDF)
External Links:
Pubchem Compound ID49
Kegg IDC00141
ChemSpider ID48
Wikipedia IDNot Available
BioCyc IDNot Available
Ligand ExpoKIV