Fig 7. Evolutionary history of the ColE1 plasmids.
The schematic representation of the ColE1 ori is illustrated with two antisense black arrows for both the RNAI and RNAII, and the ColE1 relaxase with a thick grey arrow annotated as MOB. The divergent evolution of the ColE1 ori within Aeromonadales/Enterobacterales and Pasteurellales/Vibrionales, respectively, is represented with black arrows ending in two grey boxes, each of them showing three (SL1-3) or two stem loops (SL1-2). At the right of the figure, the genetic elements related to the ColE1 plasmids within each Order are represented. The rop gene in Enterobacterales is represented with a blue arrow; the repB gene in Aeromonadales with a purple arrow; and the dashed purple arrow below the repB gene represents its variable location within the plasmid.