L-Threonine

In 1935 threonine was discovered as an essential dietary amino acid. It was discovered by William Cumming Rose and was the last essential amino acid to have been recognized.

IUPAC Name: (2S,3R)-2-Amino-3-hydroxybutanoic acid
Symbol: Thr or T
Molecular Weight: 119.11916 g/mol
Molecular Formula: C4H9NO3
Canonical SMILES: CC(C(C(=O)O)N)O
Isomeric SMILES: C[C@H]([C@@H](C(=O)O)N)O
InChIKey Identifier: AYFVYJQAPQTCCC-QYISKGLTDV
CAS Number: 72-19-5
MDL Number: MFCD00064270
Melting point: 256 °C
Solubility in water: 90 g/L (20 °C)
2D Molfile: Get the molfile
3D PDB file: Get the PDB file
Other names: (2S,3R)-2-Amino-3-hydroxybutyric acid; L-2-Amino-3-hydroxybutyric acid; (S)-Threonine

Load 3D Structure of Threonine

Threonine supports the immune system by aiding in the production of antibodies, and because it is found largely in the central nervous system, may be helpful in treating some types of depression.

Go to Amino Acids index page.