Journal
JOURNAL OF BACTERIOLOGY
Volume 183, Issue 18, Pages 5445-5448Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.183.18.5445-5448.2001
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Transpositional activity of mobile elements can be induced by different environmental stresses. Here, we present evidence that transposition of Tn4652 is elevated in stationary-phase Pseudomonas putida and suppressed in an isogenic sigma (s)-defective strain. We demonstrate that transcription from the Tn4652 transposase promoter is controlled by the stationary-phase-specific sigma factor sigma (s). To our knowledge, this is the first example of direct stationary-phase-specific regulation of a mobile element transposase. Data presented in this report support the idea that activation of transposition under stressful conditions could be an inducible process.
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