Glycosyltransferase family 52. This family features glycosyltransferases belonging to glycosyltransferase family 52, which have alpha-2,3- sialyltransferase (EC:4.2.99.4) and alpha-glucosyltransferase (EC 2.4.1.-) activity. For example, beta-galactoside alpha-2,3- sialyltransferase expressed by Neisseria meningitidis is a member of this family and is involved in a step of lipooligosaccharide biosynthesis requiring sialic acid transfer; these lipooligosaccharides are thought to be important in the process of pathogenesis. This family includes several bacterial lipooligosaccharide sialyltransferases similar to the Haemophilus ducreyi LST protein. Haemophilus ducreyi is the cause of the sexually transmitted disease chancroid and produces a lipooligosaccharide (LOS) containing a terminal sialyl N-acetyllactosamine trisaccharide.

ABC-type multidrug transport system, ATPase component. The biological function of this family is not well characterized, but display ABC domains similar to members of ABCA subfamily. ABC transporters are a large family of proteins involved in the transport of a wide variety of different compounds, like sugars, ions, peptides, and more complex organic molecules. The nucleotide binding domain shows the highest similarity between all members of the family. ABC transporters are a subset of nucleotide hydrolases that contain a signature motif, Q-loop, and H-loop/switch region, in addition to, the Walker A motif/P-loop and Walker B motif commonly found in a number of ATP- and GTP-binding and hydrolyzing proteins.

Uncharacterized protein HI_0871 OS=Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) OX=71421 GN=HI_0871 PE=4 SV=1