This is a family of type A glycosyltransferases found in Legionella. It acts as a virulence factor by the glucosylation of EF1A (elongation factor 1A) thereby blocking protein synthesis in the host cell [1-2].
This domain is found at the N-terminal end of Glucosyltransferase Lgt1 from Legionella pneumophila, which has been suggested to be involved in pathogenesis. This domain adopts a completely alpha -helical configuration [1,2].