 Homologues of SgaT, like other PTS protein homologues, have been identified in a large number of evolutionarily divergent bacteria, but not in archaea or eukaryotes.Bacteria that encode SgaT homologues include numerous Gram-negative proteobacteria, as well as many low and high G+C Gram-positive bacteria.Except for species of "Corynebacterium, Streptomyces" and "Bacillus," almost all organisms possessing SgaTBA homologues are human/animal pathogens.