Definition of serine in English:



mass nounBiochemistry
  • A hydrophilic amino acid which is a constituent of most proteins.

    Chemical formula: CH₂OHCHNH₂COOH

    • ‘Hydroxyl radicals oxidize amino acids such as lysine, serine, arginine, and proline.’
    • ‘In animal cells serine, threonine and tyrosine are the amino acids subject to phosphorylation.’
    • ‘All of these silks are composed of protein chains in which the amino acids glycine, alanine, and serine dominate.’
    • ‘The active site of trypsin involves a catalytic triad consisting of the amino acids serine, histidine and aspartic acid.’
    • ‘The overall photorespiratory cycle is also linked to amino acid metabolism in that glycine, serine, glutamate, and glutamine are metabolized at high rates.’


Late 19th century: from Latin sericum ‘silk’ + -ine.