Fig 1. Genetic loci associated with siderophore biosynthesis and transport in A. baumannii ATCC 17978.

Gene clusters for acinetobactin (A), baumannoferrin (B), and fimsbactins (C) are shown. Genes for the reductive release of iron from the siderophore, biosynthesis, import, export, and regulation are shown in the colors indicated in the corresponding legend. Putative Fur boxes are represented by black arrows, and the scale bar for each panel represents 1 kb. Key biosynthetic genes that were disrupted to elucidate siderophore function in this study are highlighted with thick black borders. A schematic highlighting the known and predicted siderophore biosynthetic and transport proteins in A. baumannii ATCC 17978, using the same color scheme as in A-C (D).