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sulA-independent division inhibition in his-constitutive strains of Salmonella typhimurium

Isidre Gibert, Josep Casadesús
DOI: http://dx.doi.org/10.1111/j.1574-6968.1990.tb04230.x 205-210 First published online: 1 June 1990


Constitutive expression of the S. typhimurium histidine operon causes multiple phenotypic changes including strong flamentation. However, the SOS regulatory network is not involved in the inhibition of cell division. The possibility of SOS- independent activation of sulA gene transcription has been ruled out using sulA-lacZ fusions. These results suggest that existence of a pathway of division inhibition unrelated to sulA and not regulated by the SOS system.

Key words
  • Histidine operon
  • Filamentation
  • SOS regulation

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