Involvement of EupR,a response regulator of the NarL/FixJ family,in the control of the uptake of the compatible solutes ectoines by the halophilic bacterium <Emphasis Type="Italic">Chromohalobacter salexigens</Emphasis> |
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| Authors: | Javier Rodríguez-Moya Montserrat Argandoña Mercedes Reina-Bueno Joaquín J Nieto Fernando Iglesias-Guerra Mohamed Jebbar Carmen Vargas |
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| Institution: | 1.Department of Microbiology and Parasitology,Faculty of Pharmacy, University of Seville,Seville,Spain;2.Department of Organic and Pharmaceutical Chemistry,Faculty of Pharmacy, University of Seville,Seville,Spain;3.Laboratoire Interactions Cellulaires et Moléculaires, DUALS, CNRS 6026,Université de Rennes I,Rennes Cedex,France;4.Laboratoire de Microbiologie des Environnements Extrêmes - LM2E (CNRS),Université de Bretagne Occidentale,Plouzané,France |
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| Abstract: | Background Osmosensing and associated signal transduction pathways have not yet been described in obligately halophilic bacteria. Chromohalobacter salexigens is a halophilic bacterium with a broad range of salt tolerance. In response to osmotic stress, it synthesizes and accumulates
large amounts of the compatible solutes ectoine and hydroxyectoine. In a previous work, we showed that ectoines can be also
accumulated upon transport from the external medium, and that they can be used as carbon sources at optimal, but not at low
salinity. This was related to an insufficient ectoine(s) transport under these conditions. |
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