Figure 7.

Configuration and rearrangement of operons in the different P. salmonis genogroups. (A) Operons A and B in the P. salmonis LF-89 strain (Accession Number CP011849.2). Differences in length existed between the operons, with operon A containing 5,061 nt and operon B 5,337 nt. This size difference was given by the insertion of a sequence fragment into the ITS1 region. (B) Structural genomic organization of ribosomal operons in all P. salmonis strains with an available complete genome sequence (LF genogroup strains: blue lines; EM genogroup strains; orange lines). Operon A (green blocks) varied in length between 5,061 and 5,064 bp. Operon B (yellow blocks) varied in length between 5,335 and 5,338 bp. The number of gene cassettes (gray blocks) of the Dot/Icm type IVB secretion system varied by genogroup. (C) Locations and directions of the operons, with reorganizations indicated by connecting colored lines and arrows. These sequences were ordered according to the distribution of the contiguous genes distributed near each operon, as detailed in Supplementary Figure 5, Supplementary Table 3.