An unusual amino acid of proteins, the selenium analogue of cysteine, in which a selenium atom replaces sulphur. Involved in the catalytic mechanism of seleno-enzymes such as formate dehydrogenase of E. coli, and mammalian glutathione peroxidase. May be co-translationally coded by a special opal suppressor tRNAase that recognizes certain UGA nonsense codons.

Dictionary of molecular biology. 2004.

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  • C3H7NO2Se — Sélénocystéine Sélénocystéine Structure de la L …   Wikipédia en Français

  • Selenium — (pronEng|səˈliniəm) is a chemical element with the atomic number 34, represented by the chemical symbol Se, an atomic mass of 78.96. It is a nonmetal, chemically related to sulfur and tellurium, and rarely occurs in its elemental state in nature …   Wikipedia

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