The glycosyltransferase WecG/TagA superfamily contains Escherichia coli WecG, Bacillus subtilis TagA and related proteins. E. coli WecG is believed to be a UDP-N-acetyl-D-mannosaminuronic acid transferase, and is involved in enterobacterial common antigen (eca) synthesis. B. subtilis TagA plays a key role in the Wall Teichoic Acid (WTA) biosynthetic pathway, catalyzing the transfer of N-acetylmannosamine to the C4 hydroxyl of a membrane-anchored N-acetylglucosaminyl diphospholipid to make ManNAc-beta-(1,4)-GlcNAc-pp-undecaprenyl. This is the first committed step in this pathway. Also included in this group is Xanthomonas campestris pv. campestris GumM, a glycosyltransferase participating in the biosynthesis of the exopolysaccharide xanthan.
bacterial polymer biosynthesis proteins, WecB/TagA/CpsF family. The WecG member of this superfamily, believed to be UDP-N-acetyl-D-mannosaminuronic acid transferase, plays a role in enterobacterial common antigen (eca) synthesis in Escherichia coli. Another family member, the Bacillus subtilis TagA protein, is involved in the biosynthesis of the cell wall polymer poly(glycerol phosphate). The third family member, CpsF, CMP-N-acetylneuraminic acid synthetase has a role in the capsular polysaccharide biosynthesis pathway. [Cell envelope, Biosynthesis and degradation of surface polysaccharides and lipopolysaccharides]
