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. 2014 Jul 10;10(7):e1004448. doi: 10.1371/journal.pgen.1004448

Figure 6. Models of chromosome I and II organisation and reorganisations by parS1 and oriC1 actions.

Figure 6

(A) Chromosome I was divided in 4 regions Ori in green corresponding to the region proximal of the replication origin , Left in blue, Right in Red corresponding to the left and right replichores and Ter in Yellow corresponding to the matS sites containing region (circular map). In the WT context, the Ori and the Ter are confined to the old pole and new pole, respectively. The Left and Right are laying in between. In the ΔparS1 context, the longitudinal organisation is maintained but the Ori is detached from the pole. The loss of parS1 sites do not convert the organisation of chromosome I to a transversal type as in E. coli (crossed drawing). In the parS1 650 kb context, the Left becomes more polar than the Ori region. The Right is restricted toward the new pole where the Ter remains positioned. In the oriC1 651 kb context, the Left becomes as polar as the Ori but the chromosome is globally less organised. (B) The chromosome II was divided in 4 regions as for chromosome I. In the WT context, the Ori was confined to midcell. The Left and Right are extended from midcell to the new pole. The TerII is not closely tethered to the new pole as terI.