Record Information
Version 1.0
Update Date 1/22/2018 12:54:54 PM
Metabolite IDPAMDB001426
Name: L-Allothreonine
Description:Allothreonine is the substrate of the enzyme Serine hydroxymethyltransferase1 (SHMT, EC SHMT uses pyridoxal 5'-phosphate (PLP) and tetrahydropteroylglutamate (H4PteGlu) as coenzymes and catalyzes the reversible interconversion of serine and glycine. In addition to these physiological reactions, SHMT also catalyzes, in the absence of H4PteGlu, the retroaldol cleavage of several 3-hydroxyamino acids, such as allothreonine.
  • (2S,3S)-2-amino-3-hydroxybutanoate
  • (2S,3S)-2-amino-3-hydroxybutanoic acid
  • Allo-L-threonine
  • D-Allothreonine
  • L-Allo-Threonine
Chemical Formula: C4H9NO3
Average Molecular Weight: 119.1192
Monoisotopic Molecular Weight: 119.058243159
CAS number: 24830-94-2
IUPAC Name:(2S,3S)-2-amino-3-hydroxybutanoic acid
Traditional IUPAC Name: L-allothreonine
Chemical Taxonomy
Taxonomy DescriptionThis compound belongs to the class of organic compounds known as hydroxy fatty acids. These are fatty acids in which the chain bears a hydroxyl group.
Kingdom Organic compounds
Super ClassLipids and lipid-like molecules
Class Fatty Acyls
Sub ClassFatty acids and conjugates
Direct Parent Hydroxy fatty acids
Alternative Parents
  • Hydroxy fatty acid
  • L-alpha-amino acid
  • Alpha-amino acid or derivatives
  • Alpha-amino acid
  • Short-chain hydroxy acid
  • Beta-hydroxy acid
  • Amino fatty acid
  • Hydroxy acid
  • Secondary alcohol
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Primary amine
  • Organooxygen compound
  • Organonitrogen compound
  • Primary aliphatic amine
  • Carbonyl group
  • Amine
  • Alcohol
  • Aliphatic acyclic compound
Molecular Framework Aliphatic acyclic compounds
External Descriptors
Physical Properties
State: Solid
Melting point: 256 °C
Experimental Properties:
Predicted Properties
Water Solubility477.0 mg/mLALOGPS
pKa (Strongest Acidic)2.21ChemAxon
pKa (Strongest Basic)9ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area83.55 Å2ChemAxon
Rotatable Bond Count2ChemAxon
Refractivity26.46 m3·mol-1ChemAxon
Polarizability11.08 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) (3 TMS)splash10-00xr-8940000000-61137c228f750ff5411eView in MoNA
GC-MSGC-MS Spectrum - GC-MSNot Available
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-014i-1900000000-363df736fd62d53cc4dbView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-00di-9100000000-7f4010640f9aaa91fc32View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-00di-9000000000-b74fb2510f41c62a6d3eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-00di-9000000000-e4e5e42d8f9c5a7e2499View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-00di-3900000000-3af5982aae7c0d1d4c1dView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-00di-9100000000-96f9fd8a735417bb1ac5View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-0ab9-9000000000-eaa990f46fd8a493c097View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-0a4i-9000000000-105c4ce290165725b91eView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-0a4i-9000000000-b63cc65df0fddbb42eb6View in MoNA
LC-MS/MSLC-MS/MS Spectrum - CE-ESI-TOF (CE-system connected to 6210 Time-of-Flight MS, Agilent) , Positivesplash10-00di-0900000000-cc2f28c096c87aa9d274View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-00di-9400000000-c73aeffbd76d76ccd312View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-0fk9-9700000000-af60cc91d30ce48f55f0View in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-00xr-9500000000-dd28c7e04ef0ceb1e7bbView in MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Negativesplash10-00xr-9500000000-b69e5e49d69cc04d88f7View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, NegativeNot Available
1D NMR1H NMR SpectrumNot Available
2D NMR[1H,13C] 2D NMR SpectrumNot Available
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Synthesis Reference: Shiraiwa, Tadashi; Fukuda, Keiji; Kubo, Motoki. Preparation of optically active allothreonine via optical resolution by replacing crystallization. Chemical & Pharmaceutical Bulletin (2002), 50(2), 287-291.
Material Safety Data Sheet (MSDS) Download (PDF)
External Links:
Pubchem Compound ID99289
Kegg IDC05519
ChemSpider ID89699
Wikipedia IDNot Available
Ligand ExpoALO