This is the N-terminal domain of a family of fucosyltransferases. This enzyme transfers fucose from GDP-Fucose to GlcNAc in an alpha1,3 linkage [1]. This family is known as glycosyltransferase family 10 [2]. The N-terminal domain is the likely binding-region for the fucose-like substrate (manuscript in publication).

1: Conserved structural features in eukaryotic and prokaryotic fucosyltransferases. Breton C, Oriol R, Imberty A; Glycobiology 1998;8:87-94. PMID:9451017

2: A classification of nucleotide-diphospho-sugar glycosyltransferases based on amino acid sequence similarities Campbell JA, Davies GJ, Bulone V, Henrissat B; Biochem J 1997;326:929-939. PMID:9334165

3: Structure and mechanism of Helicobacter pylori fucosyltransferase. A basis for lipopolysaccharide variation and inhibitor design. Sun HY, Lin SW, Ko TP, Pan JF, Liu CL, Lin CN, Wang AH, Lin CH; J Biol Chem. 2007;282:9973-9982. PMID:17251184