threonine

thre·o·nine

T0186600 (thrē′ə-nēn′, -nĭn)n. A colorless crystalline amino acid, C₄H₉NO₃, that is obtained from the hydrolysis of protein and is an essential component of human nutrition.

[Probably from threose, a kind of sugar (alteration of erythrose : erythro- + -ose) + -ine.]

threonine

(ˈθriːəˌniːn; -nɪn) n (Biochemistry) an essential amino acid that occurs in certain proteins[C20 threon-, probably from Greek eruthron, from eruthros red (see erythro-) + -ine²]

thre•o•nine

(ˈθri əˌnin, -nɪn)

n. an essential amino acid, CH₃CHOHCH(NH₂)COOH, obtained by the hydrolysis of proteins. Symbol: T Abbr.: Thr [1936; threon- (alter. of Greek erythrón, neuter of erythrós red; see erythro-) + -ine²]

thre·o·nine

(thrē′ə-nēn′) An essential amino acid. See more at amino acid.

Thesaurus

Noun

threonine - a colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutritionessential amino acid - an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet

Translations

threonine

enUK

threonine

(thrē`ənēn), organic compound, one of the 22 α-amino acidsamino acid
, any one of a class of simple organic compounds containing carbon, hydrogen, oxygen, nitrogen, and in certain cases sulfur. These compounds are the building blocks of proteins.
..... Click the link for more information. commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of several essential amino acids needed in the diet; human beings cannot synthesize it from simpler metabolites. Young adults need about 14 mg of this amino acid per day per kilogram (6 mg per lb) of body weight. Although threonine participates in many reactions in bacteria, including the biosynthesis of vitamin B₁₂ and isoleucineisoleucine
, organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein.
..... Click the link for more information. , its metabolic role in higher animals, including man, remains obscure. It is known only as a constituent of proteins, and even in that form it is relatively unreactive. In spite of the fact that its side chain has a hydroxyl group similar to that of serineserine
, organic compound, one of the 20 amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein.
..... Click the link for more information. , there is no indication that it participates in the catalytic functions of any enzyme. Threonine was isolated from the protein fibrin in 1935 and synthesized in the same year.

Threonine

α-amino-β-hydroxybutyric acid, a natural amino acid, CH₃CH(OH)CH(NH₂)COOH. It exists in four optically active forms and two racemates (L-, D-, and DL-threonine and L-, D-, and DL-allothreonine). Natural L-threonine was isolated in 1935 from acid hydrolysates of fibrin. L-threonine constitutes 2–6 percent of all natural proteins, except protamines.

Threonine is an essential amino acid. The daily requirement for adults is 0.5 g, and for children up to the age of 7, about 3 g. The precursor of L-threonine during biosynthesis in plants and microorganisms is aspartic acid. This multistage enzymic process is regulated according to the feedback principle: excess threonine inhibits the first enzyme on the path to the biosynthesis of threonine. There are various possible pathways for the decomposition of threonine in the body; they lead to the formation of a-ketobutyric acid, acetaldehyde, and glycine, as well as pyruvic acid.

A method for the chemical synthesis of L-threonine from acetaldehyde and glycine has been developed.

REFERENCE

Meister, A. Biokhimiia aminokislot. Moscow, 1961. (Translated from English.)

E. N. SAFONOVA

threonine

[′thrē·ə‚nēn] (biochemistry) CH₃CHOHCH(NH₂)COOH A crystalline α-amino acid considered essential for normal growth of animals; it is biosynthesized from aspartic acid and is a precursor of isoleucine in microorganisms.

threonine

[thre´o-nēn] a naturally occurring amino acid, one of the essential amino acids.

thre·o·nine (T, Thr),

(thrē'ō-nēn), 2-Amino-3-hydroxybutyric acid; the l-isomer is one of the naturally occurring amino acids, included in the structure of most proteins, and nutritionally essential in the diet of humans and other mammals.

threonine

(thrē′ə-nēn′, -nĭn)n. A colorless crystalline amino acid, C₄H₉NO₃, that is obtained from the hydrolysis of protein and is an essential component of human nutrition.

thre·o·nine

(T) (thrē'ō-nēn) One of the naturally occurring amino acids, included in the structure of most proteins and nutritionally essential in the diet of humans and other mammals.

threonine

One of the 20 AMINO ACIDS that form proteins and an essential ingredient in the diet. The substance is used as one of the ingredients in the externally-applied antibiotic preparation Cicatrin.

Fig. 296 Threonine . Molecular structure.

threonine (T, Thr)

one of 20 AMINO ACIDS common in proteins. It has a polar ‘R’ group structure and is soluble in water. See Fig. 296 . The ISOELECTRIC POINT of threonine is 5.6.

thre·o·nine

(T, Thr) (thrē'ō-nēn) One of the naturally occurring amino acids, included in the structure of most proteins and nutritionally essential in the diet of humans and other mammals.

threonine

thre·o·nine

threonine

thre•o•nine

thre·o·nine

threonine

threonine

Threonine

REFERENCE

threonine

threonine

threonine

thre·o·nine (T, Thr),

threonine

thre·o·nine

threonine

threonine (T, Thr)

thre·o·nine

threonine

Words related to threonine

noun a colorless crystalline amino acid found in protein

Related Words