FIG. 2.

Organization of the putative Ybt cluster in the genome of P. syringae pv. tomato DC3000. Gene names are modeled after the Ybt cluster in Y. pestis, except for pchA and pchB, which are named after the P. aeruginosa orthologs. P. syringae pv. tomato DC3000 genes from PSPTO2595 (pchA) to PSPTO2606 (ybtA) are shown. ybtA is shaded light gray and is an AraC-type transcriptional regulator. Transport genes are shaded black and consist of the TonB-dependent receptor fyuA and two ABC transporters, ybtP and ybtQ. Biosynthetic genes are shaded dark gray and include the isochorismate synthase gene pchA and the salicyl-AMP ligase gene ybtE. ybtX is shaded white and has no identified function in Y. pestis.