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. 1987 Sep;169(9):4036–4040. doi: 10.1128/jb.169.9.4036-4040.1987

Involvement of FtsZ protein in shift-up-induced division delay in Escherichia coli.

F Kepes, R D'Ari
PMCID: PMC213705  PMID: 3040674

Abstract

A nutritional shift-up from glucose minimal medium to LB broth was previously shown to cause a division delay of about 20 min in synchronized cultures of Escherichia coli, and a similar delay was observed after a nutritional pulse (a shift-up followed rapidly by a return to glucose minimal medium). Using synchronized cultures, we show here that the pulse-induced division delay does not require protein synthesis during the period in LB broth, suggesting that a nonprotein signal is generated by the shift-up and transmitted to the cell division machinery. The cell division protein FtsZ, target of the SOS-associated division inhibitor SfiA (or SulA), seems to be involved in the postshift division delay. Mutants in which the FtsZ-SfiA interaction is reduced, either sfiA (loss of SfiA) or ftsZ(SfiB) (modification of FtsZ), have a 50- to 60-min division delay after a shift-up. Furthermore, after a nutritional pulse, the ftsZ(SfiB) mutant had only a 10- to 16-min delay. These results suggest that the FtsZ protein is the target element of the cell division machinery to which the shift-up signal is transmitted.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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