What is threonine?

  • (noun): A colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutrition.

Threonine

Threonine (abbreviated as Thr or T) is an α-amino acid with the chemical formula HO2CCH(NH2)CH(OH)CH3. Its codons are ACU, ACA, ACC, and ACG. This essential amino acid is classified as polar. Together with serine, threonine is one of two proteinogenic amino acids bearing an alcohol group (tyrosine is not an alcohol but a phenol, since its hydroxyl group is bonded directly to an aromatic ring, giving it different acid/base and oxidative properties). It is also one of two common amino acids that bear a chiral side chain, along with isoleucine.

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Some articles on threonine:

L-threonine 3-dehydrogenase
... In enzymology, a L-threonine 3-dehydrogenase (EC 1.1.1.103) is an enzyme that catalyzes the chemical reaction L-threonine + NAD+ L-2-amino-3-oxobutanoate + NADH + H+ Thus, the two substrates of this enzyme are L-t ... Other names in common use include L-threonine dehydrogenase, threonine 3-dehydrogenase, and threonine dehydrogenase ... This enzyme participates in glycine, serine and threonine metabolism ...
L-threonine Dehydrogenase
... L-Threonine dehydrogenase is an enzyme that facilitates the catabolism of threonine ... It catalyses its conversion to glycine via 2-amino-3-ketobutyrate with concomitant reduction of NAD+ ...
Beta Adrenergic Receptor Kinase - βARK Activation
... that it acts on, it will phosphorylate serine and threonine residues on βARK ... (step 7) βARK, itself a serine/threonine kinase, will then phosphorylate serine and threonine resides on the β-adrenergic receptor itself ...
Threonine - Sources
... Foods high in threonine include cottage cheese, poultry, fish, meat, lentils, and sesame seeds ... Racemic threonine can be prepared from crotonic acid by alpha-functionalization using mercury(II) acetate ...
PIM1
... Molecular function • protein serine/threonine kinase activity • protein binding • ATP binding • transcription factor binding • manganese ion binding ... Pim-1 is a proto-oncogene which encodes for the serine/threonine kinase of the same name ...