Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Threonine

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1590-4

Definition

Threonine is one of the protein amino acids whose chemical formula is HO2CCH(NH2)CH(OH)CH3. Its three-letter symbol is Thr, and its one-letter symbol is T. As in the case of serine, it has a hydroxyl (−OH) group in its side chain, and it is classified as a polar amino acid. Its molecular weight is 119.12, and its isoelectric point is 6.16. Threonine has two asymmetric carbons (α-carbon and β-carbon) as does isoleucine. Thus, threonine has four stereoisomers: l-threonine, d-threonine, l-allo-threonine, and d-allo-threonine. Only l-threonine is used in biosynthesis of proteins, and it is widely distributed in the biosphere.

See Also

Keywords

Molecular Weight Bioorganic Chemistry Isoelectric Point Chemical Formula Protein Amino Acid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Yokohama National UniversityYokohamaJapan