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Journal of Bacteriology, September 2001, p. 5445-5448, Vol. 183, No. 18
Estonian Biocentre and Institute of Molecular
and Cell Biology, Tartu University, 51010 Tartu, Estonia
Received 9 April 2001/Accepted 11 June 2001
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
0021-9193/01/$04.00+0 DOI: 10.1128/JB.183.18.5445-5448.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Involvement of
S in
Starvation-Induced Transposition of Pseudomonas putida
Transposon Tn4652
S-defective strain. We demonstrate that transcription
from the Tn4652 transposase promoter is controlled by
the stationary-phase-specific sigma factor
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.
*
Corresponding author. Mailing address: Estonian
Biocentre and Institute of Molecular and Cell Biology, Tartu
University, 23 Riia Street, 51010 Tartu, Estonia. Phone: 372-7-375015. Fax: 372-7-420286. E-mail: rhorak{at}ebc.ee.
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