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An inducible DNA replication–cell division coupling mechanism in E. coli

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Abstract

Cell division is a tightly regulated periodic process. In steady-state cultures of Enterobacteriaceae, division takes place at a well defined cell mass1 and is strictly coordinated with DNA replication2. In wild-type Escherichia coli the formation of cells lacking DNA is very rare3, and interruptions of DNA replication arrest cell division4–6. The molecular bases of this replication-division coupling have been elusive but several models have been proposed. It has been suggested, for example, that the termination of a round of DNA replication may trigger a key event required for cell division4–8. A quite different model postulates the existence of a division inhibitor which prevents untimely division and whose synthesis is induced to high levels when DNA replication is perturbed9. The work reported here establishes the existence of the latter type of replication-division coupling in E. coli, and shows that the sfiA gene product is an inducible component of this division inhibition mechanism which is synthesized at high levels after perturbations of DNA replication.

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Authors and Affiliations

  1. Institut de Recherche en Biologic Moléculaire, 2, Place Jussieu (Tour 43), 75221, Paris, Cedex 05, France

    Olivier Huisman & Richard D'Ari

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  1. Olivier Huisman
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  2. Richard D'Ari
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Huisman, O., D'Ari, R. An inducible DNA replication–cell division coupling mechanism in E. coli. Nature 290, 797–799 (1981). https://doi.org/10.1038/290797a0

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  • DOI: https://doi.org/10.1038/290797a0

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