Phylogeny of A. baumannii type IV pilin genes.
A, dendogram of major pilin amino acid sequences from 20 representative strains of A. baumannii (green), P. aeruginosa (orange), and D. nodosus (blue). The sequences of PilAAB5075, PilAACICU, and PilABIDMC57 are marked on their respective branches (accession numbers in Table S1). B, dendogram of A. baumannii pilin amino acid sequences. Branches for each of the seven pilins are highlighted in red (PilA), orange (FimU), light orange (PilV), yellow (PilW), green (PilX), light blue (PilE1), and dark blue (PilE2); the genetic organization of the pilin genes is diagrammed below in the corresponding colors.