This family of proteins is functionally uncharacterised. This family of proteins is found in bacteria, archaea, eukaryotes and viruses. Proteins in this family are typically between 260 and 408 amino acids in length. This entry corresponds to a region of about 200 amino acids in length with multiple conserved motifs. There are two conserved sequence motifs: GAP and NGG. In some proteins this domain is found associated with various glycosyl transferase enzyme domains, suggesting this domain has a related role in glycan biosynthesis.