ContaminantDB: L-Threonine

Identification Taxonomy Biological Properties Physical Properties Toxicity Profile Spectra Concentrations Links References Targets (4)XML

Record Information

Version

1.0

Creation Date

2014-08-29 06:35:36 UTC

Update Date

2026-05-14 16:24:20 UTC

Accession Number

CHEM003328

Identification

Common Name

L-Threonine

Class

Small Molecule

Description

Threonine is an essential amino acid in humans. It is abundant in human plasma, particularly in newborns. Severe deficiency of threonine causes neurological dysfunction and lameness in experimental animals. Threonine is an immunostimulant which promotes the growth of thymus gland. It also can probably promote cell immune defense function. This amino acid has been useful in the treatment of genetic spasticity disorders and multiple sclerosis at a dose of 1 gram daily. It is highly concentrated in meat products, cottage cheese and wheat germ. The threonine content of most of the infant formulas currently on the market is approximately 20% higher than the threonine concentration in human milk. Due to this high threonine content the plasma threonine concentrations are up to twice as high in premature infants fed these formulas than in infants fed human milk. The whey proteins which are used for infant formulas are sweet whey proteins. Sweet whey results from cheese production. Threonine catabolism in mammals appears to be due primarily (70-80%) to the activity of threonine dehydrogenase (EC 1.1.1.103) that oxidizes threonine to 2-amino-3-oxobutyrate, which forms glycine and acetyl CoA, whereas threonine dehydratase (EC 4.2.1.16) that catabolizes threonine into 2-oxobutyrate and ammonia, is significantly less active. Increasing the threonine plasma concentrations leads to accumulation of threonine and glycine in the brain. Such accumulation affects the neurotransmitter balance which may have consequences for the brain development during early postnatal life. Thus, excessive threonine intake during infant feeding should be avoided. (1).

Contaminant Sources

Cosmetic Chemicals
EAFUS Chemicals
FooDB Chemicals
HMDB Contaminants - Feces
HMDB Contaminants - Urine
HPV EPA Chemicals
STOFF IDENT Compounds
T3DB toxins
ToxCast & Tox21 Chemicals

Contaminant Type

Amine
Amino Acid, Essential
Animal Toxin
Dietary Supplement
Drug
Food Toxin
Household Toxin
Metabolite
Micronutrient
Natural Compound
Nutraceutical
Organic Compound
Supplement

Chemical Structure

MOL SDF PDB SMILES InChI

Synonyms

Value	Source
(2S)-Threonine	ChEBI
(2S,3R)-(-)-Threonine	ChEBI
(2S,3R)-2-Amino-3-hydroxybutanoic acid	ChEBI
2-Amino-3-hydroxybutyric acid	ChEBI
L-(-)-Threonine	ChEBI
L-2-Amino-3-hydroxybutyric acid	ChEBI
L-alpha-Amino-beta-hydroxybutyric acid	ChEBI
L-Threonin	ChEBI
T	ChEBI
Thr	ChEBI
THREONINE	ChEBI
(2S,3R)-2-Amino-3-hydroxybutanoate	Generator
2-Amino-3-hydroxybutyrate	Generator
L-2-Amino-3-hydroxybutyrate	Generator
L-a-Amino-b-hydroxybutyrate	Generator
L-a-Amino-b-hydroxybutyric acid	Generator
L-alpha-Amino-beta-hydroxybutyrate	Generator
L-Α-amino-β-hydroxybutyrate	Generator
L-Α-amino-β-hydroxybutyric acid	Generator
(2S,3R)-2-Amino-3-hydroxybutyrate	HMDB
(2S,3R)-2-Amino-3-hydroxybutyric acid	HMDB
(R-(R,s))-2-amino-3-hydroxybutanoate	HMDB
(R-(R,s))-2-amino-3-hydroxybutanoic acid	HMDB
(S)-Threonine	HMDB
2-Amino-3-hydroxybutanoate	HMDB
2-Amino-3-hydroxybutanoic acid	HMDB
Threonin	HMDB
[R-(R,s)]-2-amino-3-hydroxy-butanoate	HMDB
[R-(R,s)]-2-amino-3-hydroxy-butanoic acid	HMDB
[R-(R,s)]-2-amino-3-hydroxybutanoate	HMDB
[R-(R,s)]-2-amino-3-hydroxybutanoic acid	HMDB
L Threonine	HMDB

Chemical Formula

C₄H₉NO₃

Average Molecular Mass

119.119 g/mol

Monoisotopic Mass

119.058 g/mol

CAS Registry Number

72-19-5

IUPAC Name

(2S,3R)-2-amino-3-hydroxybutanoic acid

Traditional Name

L-threonine

SMILES

C[C@@H](O)[C@H](N)C(O)=O

InChI Identifier

InChI=1S/C4H9NO3/c1-2(6)3(5)4(7)8/h2-3,6H,5H2,1H3,(H,7,8)/t2-,3+/m1/s1

InChI Key

AYFVYJQAPQTCCC-GBXIJSLDSA-N

Chemical Taxonomy

Description

belongs to the class of organic compounds known as l-alpha-amino acids. These are alpha amino acids which have the L-configuration of the alpha-carbon atom.

Kingdom

Organic compounds

Super Class

Organic acids and derivatives

Class

Carboxylic acids and derivatives

Sub Class

Amino acids, peptides, and analogues

Direct Parent

L-alpha-amino acids

Alternative Parents

Substituents

L-alpha-amino acid
Beta-hydroxy acid
Short-chain hydroxy acid
Hydroxy acid
Fatty acid
Amino acid
Secondary alcohol
Carboxylic acid
Monocarboxylic acid or derivatives
Alcohol
Hydrocarbon derivative
Primary amine
Organooxygen compound
Organonitrogen compound
Organic oxide
Primary aliphatic amine
Organopnictogen compound
Organic oxygen compound
Carbonyl group
Organic nitrogen compound
Amine
Aliphatic acyclic compound

Molecular Framework

Aliphatic acyclic compounds

External Descriptors

aspartate family amino acid (CHEBI:16857 )
proteinogenic amino acid (CHEBI:16857 )
L-alpha-amino acid (CHEBI:16857 )
threonine (CHEBI:16857 )
Common amino acids (C00188 )

Biological Properties

Status

Detected and Not Quantified

Origin

Endogenous

Cellular Locations

Cytoplasm
Extracellular
Membrane

Biofluid Locations

Not Available

Tissue Locations

All Tissues
Prostate

Pathways

Name	SMPDB Link	KEGG Link
Glycine and Serine Metabolism	SMP00004	map00260
Threonine and 2-Oxobutanoate Degradation	SMP00452	Not Available
Transcription/Translation	SMP00019	Not Available
Hartnup Disorder	SMP00189	Not Available

Applications

nutraceutical

Biological Roles

Chemical Roles

Not Available

Physical Properties

State

Solid

Appearance

White powder.

Experimental Properties

Property	Value
Melting Point	256 dec°C
Boiling Point	Not Available
Solubility	9.7E+004 mg/L (at 25°C)

Predicted Properties

Property	Value	Source
Water Solubility	477 g/L	ALOGPS
logP	-3	ALOGPS
logP	-3.5	ChemAxon
logS	0.6	ALOGPS
pKa (Strongest Acidic)	2.21	ChemAxon
pKa (Strongest Basic)	9	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	4	ChemAxon
Hydrogen Donor Count	3	ChemAxon
Polar Surface Area	83.55 Å²	ChemAxon
Rotatable Bond Count	2	ChemAxon
Refractivity	26.46 m³·mol⁻¹	ChemAxon
Polarizability	11.08 Å³	ChemAxon
Number of Rings	0	ChemAxon
Bioavailability	1	ChemAxon
Rule of Five	Yes	ChemAxon
Ghose Filter	No	ChemAxon
Veber's Rule	No	ChemAxon
MDDR-like Rule	No	ChemAxon

Spectra

Spectrum Type	Description	Splash Key	View
GC-MS	GC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (3 TMS)	splash10-0gb9-0930000000-045341234639d940688b	Spectrum
GC-MS	GC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (Non-derivatized)	splash10-0gb9-0930000000-08f448150a2533471625	Spectrum
GC-MS	GC-MS Spectrum - GC-MS (2 TMS)	splash10-0159-1910000000-98a39d63665a1a1855dd	Spectrum
GC-MS	GC-MS Spectrum - GC-MS (3 TMS)	splash10-014i-1960000000-82e1bd8ff2e302e6b51b	Spectrum
GC-MS	GC-MS Spectrum - EI-B (Non-derivatized)	splash10-0159-0910000000-d36a7a07f0444e55e38f	Spectrum
GC-MS	GC-MS Spectrum - EI-B (Non-derivatized)	splash10-014i-0980000000-ebba7965f95f804648ab	Spectrum
GC-MS	GC-MS Spectrum - GC-EI-TOF (Non-derivatized)	splash10-0gb9-0930000000-045341234639d940688b	Spectrum
GC-MS	GC-MS Spectrum - GC-EI-TOF (Non-derivatized)	splash10-0gb9-0930000000-08f448150a2533471625	Spectrum
GC-MS	GC-MS Spectrum - GC-EI-QQ (Non-derivatized)	splash10-0ffa-3921000000-05359581d7eb97866c8f	Spectrum
GC-MS	GC-MS Spectrum - GC-MS (Non-derivatized)	splash10-0159-1910000000-98a39d63665a1a1855dd	Spectrum
GC-MS	GC-MS Spectrum - GC-MS (Non-derivatized)	splash10-014i-1960000000-82e1bd8ff2e302e6b51b	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positive	splash10-00dl-9000000000-a05d200d324c3242c239	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (2 TMS) - 70eV, Positive	splash10-0fdk-8930000000-c4701f28963821b700b3	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_1_1) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_1_2) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_1_3) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_2_2) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_2_3) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TMS_2_4) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TBDMS_1_1) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TBDMS_1_2) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TBDMS_1_3) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TBDMS_2_1) - 70eV, Positive	Not Available	Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - GC-MS (TBDMS_2_2) - 70eV, Positive	Not Available	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)	splash10-00di-9300000000-85dce837b0f965e73c8a	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)	splash10-0a4i-9000000000-221510fd551c0b52c362	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)	splash10-0a4i-9100000000-6ee11649899572cd4867	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-00di-0900000000-fde7ef1951fddff4b817	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-0uk9-8900000000-2d7e5609618437e59272	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-000i-9000000000-4b43567f4a446aed0828	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-014i-4900000000-45382d9abd25be948e5b	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-00di-0900000000-071b61d3ea723715c1c1	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-0a59-9000000000-c8320d0556dbe72049ca	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-0uk9-8900000000-9945ecd06408cb733177	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Positive	splash10-0ufr-8900000000-c9804e2bfc51ec0e8593	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Negative	splash10-02t9-0692200000-f96dba3c74726ede32de	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Negative	splash10-00di-9000000000-94eeca12e76e23c1695e	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Negative	splash10-014i-0930000000-efff9b10ae39f6ce6095	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-ITFT (LTQ Orbitrap XL, Thermo Scientfic) , Negative	splash10-014i-0190000000-74ab3cba7b57b1b1b681	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negative	splash10-014i-1900000000-d9348197a5df9756d30c	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negative	splash10-00di-9100000000-9008bb1dfd2806e9f87d	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negative	splash10-00di-9000000000-47fd01696817c86aecc5	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negative	splash10-00di-9000000000-ba9cd5b3e37ded5d3764	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positive	splash10-00di-1900000000-3fa8bd5efd825e5ac3fa	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positive	splash10-0kn9-9200000000-063cffd047551fca9ee6	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positive	splash10-0a4i-9000000000-8b82bffd35f30875a7c0	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positive	splash10-0a4i-9000000000-1748dd9a759c98e1c5ee	Spectrum
LC-MS/MS	LC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positive	splash10-0a4i-9000000000-e9069de219196460cc61	Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - 10V, Positive	splash10-0uk9-6900000000-d30fcc60bda11aeb88b4	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
1D NMR	1H NMR Spectrum	Not Available	Spectrum
1D NMR	13C NMR Spectrum	Not Available	Spectrum
2D NMR	[1H,1H] 2D NMR Spectrum	Not Available	Spectrum
2D NMR	[1H,13C] 2D NMR Spectrum	Not Available	Spectrum

Toxicity Profile

Route of Exposure

Not Available

Mechanism of Toxicity

L-Threonine is a precursor to the amino acids glycine and serine. It acts as a lipotropic in controlling fat build-up in the liver. May help combat mental illness and may be very useful in indigestion and intestinal malfunctions. Also, threonine prevents excessive liver fat. Nutrients are more readily absorbed when threonine is present.

Metabolism

Hepatic

Toxicity Values

Not Available

Lethal Dose

Not Available

Carcinogenicity (IARC Classification)

No indication of carcinogenicity to humans (not listed by IARC).

Uses/Sources

L-Threonine makes up collagen, elastin, and enamel protein. It aids proper fat metabolism in the liver, helps the digestive and intestinal tracts function more smoothly, and assists in metabolism and assimilation.

Minimum Risk Level

Not Available

Health Effects

Not Available

Symptoms

Not Available

Treatment

Not Available

Concentrations

Not Available

External Links

DrugBank ID