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MET is found in 95369 entries
  •   Chemical Component Summary   Hide
    Identifiers L-methionine
    (2S)-2-amino-4-methylsulfanyl-butanoic acid
    Formula C5 H11 N O2 S
    Molecular Weight 149.21 g/mol
    Type L-peptide linking
    Isomeric SMILES
  •   Drug Info: DrugBank Hide
    DrugBank ID DB00134   (Stereoisomeric match)
    Name L-Methionine
    • approved
    • nutraceutical
    Description A sulfur containing essential amino acid that is important in many body functions. It is a chelating agent for heavy metals. [PubChem]
    • (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
    • L-a-Amino-g-methylthiobutyric acid
    • L-alpha-amino-gamma-Methylmercaptobutyric acid
    • L-Methionin
    • L-Methionine
    • L-α-amino-γ-methylmercaptobutyric acid
    • M
    • Met
    • Methionine
    Brand names
    Affected organism Humans and other mammals
    Indication Used for protein synthesis including the formation of SAMe, L-homocysteine, L-cysteine, taurine, and sulfate.
    Pharmacology L-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 action The 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.
    • Dietary Supplements
    • Micronutrients
    • Amino Acids, Essential
    • Supplements
    ATC-Code V03AB26
    CAS number 63-68-3
    Name Sequence search Pharmacological action Actions
    Methionine synthase   Search  unknown product of
    Methionine synthase reductase   Search  unknown product of
    Betaine--homocysteine S-methyltransferase 1   Search  unknown product of
    Methionine aminopeptidase 2   Search  unknown product of
    S-methylmethionine--homocysteine S-methyltransferase BHMT2   Search  unknown product of
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