THR is found in 133832 entries

THR in polymers: 133802 entries. Examples include: 101M, 102L, 102M

THR as free ligands, exist in 30 entries. Examples include 1EVK, 1H73, 1KJO

Find related ligands: Stereoisomers Similar ligands Chemical Structure Search

View summary at Ligand Expo

Chemical Component Summary

Identifiers L-threonine
(2S,3R)-2-amino-3-hydroxy-butanoic acid
Formula C4 H9 N O3
Molecular Weight 119.12 g/mol
Type L-peptide linking
Isomeric SMILES C[C@@H](O)[C@H](N)C(O)=O
InChI InChI=1S/C4H9NO3/c1-2(6)3(5)4(7)8/h2-3,6H,5H2,1H3,(H,7,8)/t2-,3+/m1/s1

Chemical Details

Formal Charge 0
Atom Count 17
Chiral Atom Count 2
Chiral Atoms CA CB
Bond Count 16
Aromatic Bond Count 0
Leaving Atoms OXT H2 HXT

Drug Info: DrugBank

DrugBank ID DB00156   (Different stereochemistry)
Name L-Threonine
  • approved
  • nutraceutical
Description An 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 Organism Humans and other mammals
Indication L-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.
Pharmacology L-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 action L-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 number 72-19-5
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