Involvement of FtsZ in coupling of nucleoid separation with septation
| Autor: | Françoise Tétart, Mulder E, Jean-Pierre Bouché, Albigot R, Annie Conter |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
DNA Replication
biology Cell Cycle DNA replication RNA Gene Expression Regulation Bacterial macromolecular substances Cell cycle physiological processes Microbiology Cell biology Gene product Cytoskeletal Proteins Bacterial Proteins Replication Initiation Escherichia coli biology.protein bacteria Nucleoid biological phenomena cell phenomena and immunity Cytoskeleton FtsZ Molecular Biology |
| Zdroj: | Molecular Microbiology. 6:621-627 |
| ISSN: | 1365-2958 0950-382X |
| DOI: | 10.1111/j.1365-2958.1992.tb01509.x |
| Popis: | The cell-cycle parameters of an Escherichia coli strain expressing essential division gene ftsZ at one-fifth of its normal level, because of antisense regulation by DicF RNA, have been analysed. Inhibition of FtsZ expression affects neither the generation time nor the replication initiation mass, the C period, or the constriction period, but it does dramatically retard the initiation of constriction relative to replication termination. Separation of the nucleoids is equally postponed, indicating that division is not coupled to termination of replication, but to partitioning. The severe inhibition of nucleoid separation by DicF RNA, and its suppression by overproduction of FtsZ, suggest a role for FtsZ in the control of separation, and consequently in the coupling of separation and division. We suggest that the normal pattern of nucleoid separation previously found in cells deficient in ftsZ function was a consequence of the loss of a negative effect exerted by FtsZ on separation. In agreement with this view, we find that nucleoid separation is temporarily inhibited after arrest of FtsZ synthesis, but is later resumed as FtsZ is further diluted into the elongating filaments. |
| Databáze: | OpenAIRE |
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