Summary
A broad host range plasmid containing an operon fusion between the recA and lacZ genes of Escherichia coli was introduced into various aerobic and facultative gram-negative bacteria — 30 species belonging to 20 different genera — to study the expression of the recA gene after DNA damage. These included species of the families Enterobacteriaceae, Pseudomonadaceae, Rhizobiaceae, Vibrionaceae, Neisseriaceae, Rhodospirillaceae and Azotobacteraceae. Results obtained show that all bacteria tested, except Xanthomonas campestris and those of the genus Rhodobacter, are able to repress and induce the recA gene of E. coli in the absence and in the presence of DNA damage, respectively. All these data indicate that the SOS system is present in bacterial species of several families and that the LexA-binding site must be very conserved in them.
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Communicated by R. Devoret
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de Henestrosa Fernandez, A.R., Calero, S. & Barbé, J. Expression of the recA gene of Escherichia coli in several species of gram-negative bacteria. Molec. Gen. Genet. 226, 503–506 (1991). https://doi.org/10.1007/BF00260664
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DOI: https://doi.org/10.1007/BF00260664