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Chemical Component Summary

NameMETHIONINE
Identifiers(2S)-2-amino-4-methylsulfanyl-butanoic acid
FormulaC5 H11 N O2 S
Molecular Weight149.21 g/mol
TypeL-PEPTIDE LINKING
Isomeric SMILESCSCC[C@H](N)C(O)=O
InChIInChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1
InChIKeyFFEARJCKVFRZRR-BYPYZUCNSA-N

Chemical Details

Formal Charge0
Atom Count40
Chiral Atom Count1
Chiral AtomsCA
Bond Count19
Aromatic Bond Count0
Leaving AtomsOXT,H2,HXT

Drug Info: DrugBank

DrugBank IDDB00134 Different stereochemistry
NameL-Methionine
Groups
  • approved
  • nutraceutical
DescriptionA sulfur containing essential amino acid that is important in many body functions. It is a chelating agent for heavy metals. [PubChem]
Synonyms
  • (2S)-2-amino-4-(Methylsulfanyl)butanoic acid
  • (S)-2-amino-4-(methylthio)butanoic acid
  • (S)-2-amino-4-(methylthio)butyric acid
  • (S)-methionine
  • L-(-)-Methionine
SaltsMethionine hydrochloride
Brand Names
  • Aminosyn
  • Aminosyn 10%
  • Aminosyn 10% W Electrolytes
  • Aminosyn 3.5% M
  • Aminosyn 5%
Affected OrganismHumans and other mammals
IndicationUsed for protein synthesis including the formation of SAMe, L-homocysteine, L-cysteine, taurine, and sulfate.
PharmacologyL-Methionine is a principle supplier of sulfur which prevents disorders of the hair, skin and nails; helps lower cholesterol levels by increasing the liver's production of lecithin; reduces liver fat and protects the kidneys; a natural chelating agent for heavy metals; regulates the formation of ammonia and creates ammonia-free urine which reduces bladder irritation; influences hair follicles and promotes hair growth. L-methionine may protect against the toxic effects of hepatotoxins, such as acetaminophen. Methionine may have antioxidant activity.
Mechanism of actionThe mechanism of the possible anti-hepatotoxic activity of L-methionine is not entirely clear. It is thought that metabolism of high doses of acetaminophen in the liver lead to decreased levels of hepatic glutathione and increased oxidative stress. L-methionine is a precursor to L-cysteine. L-cysteine itself may have antioxidant activity. L-cysteine is also a precursor to the antioxidant glutathione. Antioxidant activity of L-methionine and metabolites of L-methionine appear to account for its possible anti-hepatotoxic activity. Recent research suggests that methionine itself has free-radical scavenging activity by virtue of its sulfur, as well as its chelating ability.
Route of administration
  • Intravenous
  • Oral
Categories
  • Amino Acids
  • Amino Acids, Essential
  • Amino Acids, Neutral
  • Amino Acids, Peptides, and Proteins
  • Amino Acids, Sulfur
ATC-CodeV03AB26
CAS number63-68-3
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682