[Suppression of dnaZ mutation during integration of factor F' into the chromosome of a mutant strain].

The phenomenon of suppression of dnaZ mutation has been revealed in the course of F' factor integration into the chromosome of the mutant strain. We have shown that under non-permissive conditions (t = 43 degrees C), chromosome replication in dnaZts strains proceeds under control of the factor F' replicon stably integrated into the chromosome. Possible mechanism of suppression effect, based on the formation of a bireplicon replication system, is discussed.