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Rhodobacter sphaeroides adaptation to high concentrations of cobalt ions requires energetic metabolism changes (Articolo in rivista)
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- Rhodobacter sphaeroides adaptation to high concentrations of cobalt ions requires energetic metabolism changes (Articolo in rivista) (literal)
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- 2014-01-01T00:00:00+01:00 (literal)
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- 10.1111/1574-6941.12303 (literal)
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Volpicella M.; Costanza A.; Palumbo O.; Italiano F.; Leoni C.; Placido A.; Picardi E.; Carella M.; Trotta M.; Ceci L.R. (2014)
Rhodobacter sphaeroides adaptation to high concentrations of cobalt ions requires energetic metabolism changes
in FEMS microbiology, ecology (print); Wiley, New York (Regno Unito)
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- Volpicella M.; Costanza A.; Palumbo O.; Italiano F.; Leoni C.; Placido A.; Picardi E.; Carella M.; Trotta M.; Ceci L.R. (literal)
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- National Institute of Biostructures and Biosystems (INBB) Roma Italy; Medical Genetics Unit IRCCS Casa Sollievo della Sofferenza San Giovanni Rotondo Italy; Institute for Chemical-Physical Processes Italian National Research Council (CNR) Bari Italy; Institute for Biomembranes and Bioenergetics CNR Bari Italy (literal)
- Titolo
- Rhodobacter sphaeroides adaptation to high concentrations of cobalt ions requires energetic metabolism changes (literal)
- Abstract
- Rhodobacter sphaeroides has for a long time been investigated for its adaptive capacities to different environmental and nutritional conditions, including presence of heavy metals, which make it a valuable model organism for understanding bacterial adaptation to metal stress conditions and future environmental applications, such as bioremediation of polluted sites. To further characterize the capability of R. sphaeroides to cope with high cobalt ion concentrations, we combined the selection of adaptive defective mutants, carried out by negative selection of transposon insertional libraries on 5 mM Co(2+) -enriched solid medium, with the analysis of growing capacities and transcriptome profiling of a selected mutant (R95). A comparative analysis of results from the mutant and wild-type strains clearly indicated that the adaptive ability of R. sphaeroides strongly relies on its ability to exploit any available energy-supplying metabolisms, being able to behave as photo- or chemotrophic microorganism. The selected R95 mutant, indeed, exhibits a severe down-expression of an ABC sugar transporter, which results nonpermissive for its growth in cobalt-enriched media under aerobic conditions. Interestingly, the defective expression of the transporter does not have dramatic effects on the growth ability of the mutant when cultivated under photosynthetic conditions. (literal)
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