UDP-glucose LOS-beta-1,4 glucosyltransferase is required for biosynthesis of lipooligosaccharide. UDP-glucose: lipooligosaccharide (LOS) beta-1-4-glucosyltransferase catalyzes the addition of the first residue, glucose, of the lacto-N-neotetrase structure to HepI of the LOS inner core. LOS is the major constituent of the outer leaflet of the outer membrane of gram-positive bacteria. It consists of a short oligosaccharide chain of variable composition (alpha chain) attached to a branched inner core which is lined in turn to lipid A. Beta 1,4 glucosyltransferase is required to attach the alpha chain to the inner core.

Glycosyltransferase family A (GT-A) includes diverse families of glycosyl transferases with a common GT-A type structural fold. Glycosyltransferases (GTs) are enzymes that synthesize oligosaccharides, polysaccharides, and glycoconjugates by transferring the sugar moiety from an activated nucleotide-sugar donor to an acceptor molecule, which may be a growing oligosaccharide, a lipid, or a protein. Based on the stereochemistry of the donor and acceptor molecules, GTs are classified as either retaining or inverting enzymes. To date, all GT structures adopt one of two possible folds, termed GT-A fold and GT-B fold. This hierarchy includes diverse families of glycosyl transferases with a common GT-A type structural fold, which has two tightly associated beta/alpha/beta domains that tend to form a continuous central sheet of at least eight beta-strands. The majority of the proteins in this superfamily are Glycosyltransferase family 2 (GT-2) proteins. But it also includes families GT-43, GT-6, GT-8, GT13 and GT-7; which are evolutionarily related to GT-2 and share structure similarities.

Glycosyl transferase family 2. Diverse family, transferring sugar from UDP-glucose, UDP-N-acetyl- galactosamine, GDP-mannose or CDP-abequose, to a range of substrates including cellulose, dolichol phosphate and teichoic acids.

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

Subfamily of Glycosyltransferase Family GT2 of unknown function. GT-2 includes diverse families of glycosyltransferases with a common GT-A type structural fold, which has two tightly associated beta/alpha/beta domains that tend to form a continuous central sheet of at least eight beta-strands. These are enzymes that catalyze the transfer of sugar moieties from activated donor molecules to specific acceptor molecules, forming glycosidic bonds. Glycosyltransferases have been classified into more than 90 distinct sequence based families.

ChainA, SPbeta prophage-derived glycosyltransferase SunS [Bacillus subtilis subsp. subtilis str. 168],7MSP_B Chain B, SPbeta prophage-derived glycosyltransferase SunS [Bacillus subtilis subsp. subtilis str. 168]

ChainA, SPbeta prophage-derived glycosyltransferase SunS [Bacillus subtilis subsp. subtilis str. 168],7MSN_B Chain B, SPbeta prophage-derived glycosyltransferase SunS [Bacillus subtilis subsp. subtilis str. 168]

Lipopolysaccharide core biosynthesis glycosyltransferase KdtX OS=Serratia marcescens OX=615 GN=kdtX PE=3 SV=1

Lipopolysaccharide core biosynthesis glycosyltransferase WaaE OS=Klebsiella pneumoniae OX=573 GN=waaE PE=3 SV=1

Uncharacterized glycosyltransferase HI_0653 OS=Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) OX=71421 GN=HI_0653 PE=3 SV=1

Lipopolysaccharide core biosynthesis glycosyltransferase LpsC OS=Rhizobium meliloti (strain 1021) OX=266834 GN=lpsC PE=3 SV=2

Uncharacterized glycosyltransferase RT0209 OS=Rickettsia typhi (strain ATCC VR-144 / Wilmington) OX=257363 GN=RT0209 PE=3 SV=1