ALO in polymers: 4 entries. Examples include: 2JUU 5I5B 1DSR

ALO as a free ligand exists in 5 entries. Examples include: 2W7G 5DIR 2W7L

Find related ligands: Stereoisomers Similar ligands Chemical Structure Search

View summary at Ligand Expo

Chemical Component Summary

Identifiers(2S,3S)-2-amino-3-hydroxy-butanoic acid
FormulaC4 H9 N O3
Molecular Weight119.12
Isomeric SMILESC[C@H](O)[C@H](N)C(O)=O

Chemical Details

Formal Charge0
Atom Count17
Chiral Atom Count2
Chiral AtomsCA, CB
Bond Count16
Aromatic Bond Count0
Leaving AtomsOXT, H2, HXT

Drug Info: DrugBank

DrugBank IDDB00156 Different stereochemistry
  • approved
  • nutraceutical
DescriptionAn essential amino acid occurring naturally in the L-form, which is the active form. It is found in eggs, milk, gelatin, and other proteins. [PubChem]
  • (2S,3R)-(-)-Threonine
  • (2S)-threonine
  • 2-Amino-3-hydroxybutyric acid
  • L-(-)-Threonine
  • L-2-Amino-3-hydroxybutyric acid
Brand Names
  • Aminoderm Poudre
  • Aminosyn
  • Aminosyn 10%
  • Aminosyn 10% W Electrolytes
  • Aminosyn 3.5% M
Affected OrganismHumans and other mammals
IndicationL-Threonine makes up collagen, elastin, and enamel protein. It aids proper fat metabolism in the liver, helps the digestive and intestinal tracts function more smoothly, and assists in metabolism and assimilation.
PharmacologyL-Threonine is an essential amino acid that helps to maintain the proper protein balance in the body. It is important for the formation of collagen, elastin, and tooth enamel, and aids liver and lipotropic function when combined with aspartic acid and methionine.
Mechanism of actionL-Threonine is a precursor to the amino acids glycine and serine. It acts as a lipotropic in controlling fat build-up in the liver. May help combat mental illness and may be very useful in indigestion and intestinal malfunctions. Also, threonine prevents excessive liver fat. Nutrients are more readily absorbed when threonine is present.
Route of administration
  • Intravenous
  • Topical
  • Amino Acids
  • Amino Acids, Essential
  • Amino Acids, Neutral
  • Amino Acids, Peptides, and Proteins
  • Dietary Supplements
CAS number72-19-5
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682