Escherichia coli WbuB and similar proteins. This family is most closely related to the GT1 family of glycosyltransferases. WbuB in E. coli is involved in the biosynthesis of the O26 O-antigen. It has been proposed to function as an N-acetyl-L-fucosamine (L-FucNAc) transferase.

Bacterial sugar transferase. This Pfam family represents a conserved region from a number of different bacterial sugar transferases, involved in diverse biosynthesis pathways.

Sugar transferase involved in LPS biosynthesis (colanic, teichoic acid) [Cell wall/membrane/envelope biogenesis].

exopolysaccharide biosynthesis polyprenyl glycosylphosphotransferase. Members of this family are generally found near other genes involved in the biosynthesis of a variety of exopolysaccharides. These proteins consist of two fused domains, an N-terminal hydrophobic domain of generally low conservation and a highly conserved C-terminal sugar transferase domain (pfam02397). Characterized and partially characterized members of this subfamily include Salmonella WbaP (originally RfbP), E. coli WcaJ, Methylobacillus EpsB, Xanthomonas GumD, Vibrio CpsA, Erwinia AmsG, Group B Streptococcus CpsE (originally CpsD), and Streptococcus suis Cps2E. Each of these is believed to act in transferring the sugar from, for instance, UDP-glucose or UDP-galactose, to a lipid carrier such as undecaprenyl phosphate as the first (priming) step in the synthesis of an oligosaccharide "block". This function is encoded in the C-terminal domain. The liposaccharide is believed to be subsequently transferred through a "flippase" function from the cytoplasmic to the periplasmic face of the inner membrane by the N-terminal domain. Certain closely related transferase enzymes, such as Sinorhizobium ExoY and Lactococcus EpsD, lack the N-terminal domain and are not found by this model.

colanic acid biosynthesis glycosyltransferase WcaI.

Structureof Campylobacter concisus PglC I57M/Q175M variant [Campylobacter concisus 13826],5W7L_B Structure of Campylobacter concisus PglC I57M/Q175M variant [Campylobacter concisus 13826]

Undecaprenyl phosphate N,N'-diacetylbacillosamine 1-phosphate transferase OS=Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 / NCTC 11168) OX=192222 GN=pglC PE=1 SV=1

UDP-glucose:undecaprenyl-phosphate glucose-1-phosphate transferase OS=Escherichia coli (strain K12) OX=83333 GN=wcaJ PE=1 SV=2

Undecaprenyl-phosphate glucose phosphotransferase OS=Komagataeibacter xylinus OX=28448 GN=aceA PE=3 SV=1

Exopolysaccharide production protein PSS OS=Rhizobium leguminosarum bv. phaseoli OX=385 GN=pss PE=3 SV=1

Uncharacterized sugar transferase EpsL OS=Bacillus subtilis (strain 168) OX=224308 GN=epsL PE=2 SV=1