Sulfur amino acid

Sulfur amino acid, sulfur-containing amino acid, or SAA is an amino acid containing element sulfur.[1]

Common sulfur amino acids include:

  • Proteinogenic amino acids
  • Metabolic products:
    • Cystine, a cysteine dimer, and an oxidation product of cysteine
    • Homocysteine (Hcy)
    • Homocystine, a homocysteine dimer, and an oxidation product of homocysteine
    • Cystathionine, produced by the transsulfuration pathway
    • S-Adenosyl methionine (SAM, SAMe, SAM-e, AdoMet), a common cofactor in methyltransferases
    • S-Adenosyl homocysteine (SAH), a side product of biomethylation by methyltransferases

See also

  • Homologous series, for homo- prefix
  • Cysteine metabolism
  • Taurine, sulfur-containing acidic compound with amino group, but not classified as amino acid. The compound is a sulfonic acid, and amino acid definition only allows carboxylic acids.

References

  1. ^ "CHEBI:26834 - sulfur-containing amino acid". ChEBI. 11 August 2021. Retrieved 27 March 2025.
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