threonine

American  

[three-uh-neen, -nin] / ˈθri əˌnin, -nɪn /

noun

Biochemistry.

1. an essential amino acid, CH 3 CHOHCH(NH2 )COOH, obtained by the hydrolysis of proteins. Thr; T

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threonine British  

/ ˈθriːəˌniːn, -nɪn /

noun

1. an essential amino acid that occurs in certain proteins

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threonine Scientific  

/ thrē′ə-nēn′ /

1. An essential amino acid. Chemical formula: C ₄ H ₉ NO ₃ .

2. See more at amino acid

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Etymology

Origin of threonine

1925–30; threon- (alteration of Greek erythrón, neuter of erythrós red; erythro- ) + -ine ²

Example Sentences

A-kinase regulates many vital metabolic pathways: It phosphorylates serine and threonine residues of its target proteins, activating them in the process.

From Textbooks • Jun. 9, 2022

Phosphorylation adds a phosphate group to serine, threonine, and tyrosine residues in a protein, changing their shapes, and activating or inactivating the protein.

From Textbooks • Jun. 9, 2022

Phosphorylation of serine and threonine residues often activates enzymes.

From Textbooks • Jun. 9, 2022

Strain B is able to grow in a minimal medium only when supplemented with threonine, leucine, and thiamine.

From Textbooks • Jun. 9, 2022

Metabolism experts have tried to prevent this in Brantner's case by adding two amino acids, lysine and threonine, to his diet.

From Time Magazine Archive