What is "peptide-o-fucosyltransferase"

In enzymology, a peptide-O-fucosyltransferase is an enzyme that catalyzes the chemical reaction in which an alpha-L- fucosylpyranoside residue is transferred from GDP-beta-L-fucose to the sidechain oxygen atom of a serine or threonine residue in a protein.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is GDP-beta-L-fucose:polypeptide O-alpha-L-fucosyltransferase. Other names in common use include GDP-L-fucose:polypeptide fucosyltransferase, GDP-fucose protein O-fucosyltransferase, and GDP-fucose:polypeptide fucosyltransferase.