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].

1: Structural basis of the action of glucosyltransferase Lgt1 from Legionella pneumophila. Lu W, Du J, Stahl M, Tzivelekidis T, Belyi Y, Gerhardt S, Aktories K, Einsle O; J Mol Biol. 2010;396:321-331. PMID:19941871

2: Molecular mechanism of elongation factor 1A inhibition by a Legionella pneumophila glycosyltransferase. Hurtado-Guerrero R, Zusman T, Pathak S, Ibrahim AF, Shepherd S, Prescott A, Segal G, van Aalten DM; Biochem J. 2010;426:281-292. PMID:20030628