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Record Information
StatusExpected but not Quantified
Creation Date2012-09-11 17:30:07 UTC
Update Date2017-12-07 02:57:19 UTC
Secondary Accession Numbers
  • HMDB29389
Metabolite Identification
Common Name(+)-threo-2-Amino-3,4-dihydroxybutanoic acid
Description(+)-threo-2-amino-3,4-dihydroxybutanoic acid, also known as (+)-threo-form, is a member of the class of compounds known as alpha amino acids. Alpha amino acids are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon). Thus, (+)-threo-2-amino-3,4-dihydroxybutanoic acid is considered to be a fatty acid lipid molecule (+)-threo-2-amino-3,4-dihydroxybutanoic acid is soluble (in water) and a moderately acidic compound (based on its pKa) (+)-threo-2-amino-3,4-dihydroxybutanoic acid can be found in mushrooms, which makes (+)-threo-2-amino-3,4-dihydroxybutanoic acid a potential biomarker for the consumption of this food product (+)-threo-2-Amino-3,4-dihydroxybutanoic acid is isolated from the mushroom Lyophyllum ulmariu.
2-amino-3,4-Dihydroxybutanoic acidHMDB
Chemical FormulaC4H9NO4
Average Molecular Weight135.1186
Monoisotopic Molecular Weight135.053157781
IUPAC Name2-amino-3,4-dihydroxybutanoic acid
Traditional Name2-amino-3,4-dihydroxybutanoic acid
CAS Registry Number21768-44-5
InChI Identifier
Chemical Taxonomy
DescriptionThis compound belongs to the class of chemical entities known as alpha amino acids. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon).
KingdomChemical entities
Super ClassOrganic compounds
ClassOrganic acids and derivatives
Sub ClassCarboxylic acids and derivatives
Direct ParentAlpha amino acids
Alternative Parents
  • Alpha-amino acid
  • Beta-hydroxy acid
  • Short-chain hydroxy acid
  • Hydroxy acid
  • Fatty acid
  • 1,3-aminoalcohol
  • Amino acid
  • Secondary alcohol
  • 1,2-diol
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Organic oxide
  • Organooxygen compound
  • Organonitrogen compound
  • Primary alcohol
  • Primary aliphatic amine
  • Primary amine
  • Organopnictogen compound
  • Carbonyl group
  • Organic oxygen compound
  • Amine
  • Organic nitrogen compound
  • Alcohol
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors

Biological Location:


  Cell and elements:


Physical Properties
StateNot Available
Experimental Properties
Melting Point214 - 215 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility357 g/LALOGPS
pKa (Strongest Acidic)1.92ChemAxon
pKa (Strongest Basic)8.62ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count4ChemAxon
Polar Surface Area103.78 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity28 m³·mol⁻¹ChemAxon
Polarizability12.01 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-05al-9000000000-11aa4451df1fd4df2fddView in MoNA
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (3 TMS) - 70eV, Positivesplash10-0kg6-9362000000-74af781c5358a0c416f8View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-014r-4900000000-dbd9d3d88c247a29f9c9View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-9100000000-2070d819d44de1960ae0View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-00di-9100000000-283552f8bd87ff9d06d5View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-8900000000-75b8c2945f1960264b7fView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0pw9-9400000000-43e8a71f87678ae42e12View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-05fr-9000000000-437c14b312f426383b44View in MoNA
Biological Properties
Cellular Locations
  • Cytoplasm
  • Extracellular
Biofluid LocationsNot Available
Tissue LocationNot Available
PathwaysNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB000470
KNApSAcK IDNot Available
Chemspider ID3137512
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound3914727
PDB IDNot Available
ChEBI IDNot Available
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. (). Yannai, Shmuel. (2004) Dictionary of food compounds with CD-ROM: Additives, flavors, and ingredients. Boca Raton: Chapman & Hall/CRC.. .