Regulation of solvent tolerance in Pseudomonas putida S12 mediated by mobile elements. Issue 6 (11th April 2017)

• Record Type: Journal Article
• Authors: Hosseini, Rohola; Kuepper, Jannis; Koebbing, Sebastian; Blank, Lars M.; Wierckx, Nick; de Winde, Johannes H.
• Other Names: Averous Luc guestEditor.; Blank Lars M. guestEditor.; O'Connor Kevin guestEditor.; Diaz Eduardo guestEditor.; Prieto Auxi guestEditor.; Wierckx Nick guestEditor.; Zimmermann Wolfgang guestEditor.
• Is Part Of: Microbial biotechnology. Volume 10:Issue 6(2017:Nov.)
• Page Start: 1558
• Page End: 1568
• Publication Date: 2017-04-11
• Subjects: Microbial biotechnology -- Periodicals; Biotechnology; Microbiology; 660.62
• DOI: 10.1111/1751-7915.12495
• Languages: English
• ISSNs: 1751-7915

Abstract

Summary: Organic solvent‐tolerant bacteria are outstanding and versatile hosts for the bio‐based production of a broad range of generally toxic aromatic compounds. The energetically costly solvent tolerance mechanisms are subject to multiple levels of regulation, involving among other mobile genetic elements. The genome of the solvent‐tolerant Pseudomonas putida S12 contains many such mobile elements that play a major role in the regulation and adaptation to various stress conditions, including the regulation of expression of the solvent efflux pump SrpABC. We recently sequenced the genome of P. putida S12. Detailed annotation identified a threefold higher copy number of the mobile element ISS12 in contrast to earlier observations. In this study, we describe the mobile genetic elements and elaborate on the role of ISS12 in the establishment and maintenance of solvent tolerance in P. putida . We identified three different variants of ISS12 of which a single variant exhibits a high translocation rate. One copy of this variant caused a loss of solvent tolerance in the sequenced strain by disruption of srpA . Solvent tolerance could be restored by applying selective pressure, leading to a clean excision of the mobile element. Abstract : The mobile genetic element ISS12 plays an important role in the establishesment and maintenance solvent tolerance in P. putida S12. Insertion of ISS12 in srpA of the efflux pump SrpABC caused a loss of solvent tolerance, that could be restored by applying selective pressure, leading to a clean excision of the mobile element.