mannosyltransferases of glycosyltransferase family 4 and similar proteins. This family is most closely related to the GT1 family of glycosyltransferases. ORF704 in E. coli has been shown to be involved in the biosynthesis of O-specific mannose homopolysaccharides.

phosphatidyl-myo-inositol mannosyltransferase. This family is most closely related to the GT4 family of glycosyltransferases and named after PimA in Propionibacterium freudenreichii, which is involved in the biosynthesis of phosphatidyl-myo-inositol mannosides (PIM) which are early precursors in the biosynthesis of lipomannans (LM) and lipoarabinomannans (LAM), and catalyzes the addition of a mannosyl residue from GDP-D-mannose (GDP-Man) to the position 2 of the carrier lipid phosphatidyl-myo-inositol (PI) to generate a phosphatidyl-myo-inositol bearing an alpha-1,2-linked mannose residue (PIM1). Glycosyltransferases catalyze the transfer of sugar moieties from activated donor molecules to specific acceptor molecules, forming glycosidic bonds. The acceptor molecule can be a lipid, a protein, a heterocyclic compound, or another carbohydrate residue. This group of glycosyltransferases is most closely related to the previously defined glycosyltransferase family 1 (GT1). The members of this family may transfer UDP, ADP, GDP, or CMP linked sugars. The diverse enzymatic activities among members of this family reflect a wide range of biological functions. The protein structure available for this family has the GTB topology, one of the two protein topologies observed for nucleotide-sugar-dependent glycosyltransferases. GTB proteins have distinct N- and C- terminal domains each containing a typical Rossmann fold. The two domains have high structural homology despite minimal sequence homology. The large cleft that separates the two domains includes the catalytic center and permits a high degree of flexibility. The members of this family are found mainly in certain bacteria and archaea.

Glycosyltransferase involved in cell wall bisynthesis [Cell wall/membrane/envelope biogenesis].

glycosyltransferases MtfB, WbpX, and similar proteins. This family is most closely related to the GT4 family of glycosyltransferases. MtfB (mannosyltransferase B) in E. coli has been shown to direct the growth of the O9-specific polysaccharide chain. It transfers two mannoses into the position 3 of the previously synthesized polysaccharide.

Glycosyl transferases group 1. Mutations in this domain of PIGA lead to disease (Paroxysmal Nocturnal haemoglobinuria). Members of this family transfer activated sugars to a variety of substrates, including glycogen, Fructose-6-phosphate and lipopolysaccharides. Members of this family transfer UDP, ADP, GDP or CMP linked sugars. The eukaryotic glycogen synthases may be distant members of this family.

Sucrose-phosphatesynthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_B Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_C Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_D Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_E Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_F Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_G Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_H Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_I Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_J Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_K Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus],6KIH_L Sucrose-phosphate synthase (tll1590) from Thermosynechococcus elongatus [Thermosynechococcus vestitus]

Low-salt glycan biosynthesis hexosyltransferase Agl5 OS=Haloferax volcanii (strain ATCC 29605 / DSM 3757 / JCM 8879 / NBRC 14742 / NCIMB 2012 / VKM B-1768 / DS2) OX=309800 GN=agl5 PE=3 SV=1

Uncharacterized glycosyltransferase MJ1178 OS=Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) OX=243232 GN=MJ1178 PE=3 SV=1

GDP-mannose:glycolipid 4-beta-D-mannosyltransferase OS=Xanthomonas campestris pv. campestris OX=340 GN=gumI PE=1 SV=2

Uncharacterized 41.2 kDa protein in cps region OS=Klebsiella pneumoniae OX=573 PE=4 SV=1

GDP-mannose:glycolipid 4-beta-D-mannosyltransferase OS=Xanthomonas campestris pv. campestris (strain ATCC 33913 / DSM 3586 / NCPPB 528 / LMG 568 / P 25) OX=190485 GN=gumI PE=3 SV=1