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Schoeffler M, Gaudin AL, Ramel F, Valette O, Denis Y, Hania WB, Hirschler-Réa A, Dolla A. Growth of an anaerobic sulfate-reducing bacterium sustained by oxygen respiratory energy conservation after O 2 -driven experimental evolution. Environ Microbiol 2018; 21:360-373. [PMID: 30394641 DOI: 10.1111/1462-2920.14466] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 10/25/2018] [Accepted: 10/31/2018] [Indexed: 11/30/2022]
Abstract
Desulfovibrio species are representatives of microorganisms at the boundary between anaerobic and aerobic lifestyles, since they contain the enzymatic systems required for both sulfate and oxygen reduction. However, the latter has been shown to be solely a protective mechanism. By implementing the oxygen-driven experimental evolution of Desulfovibrio vulgaris Hildenborough, we have obtained strains that have evolved to grow with energy derived from oxidative phosphorylation linked to oxygen reduction. We show that a few mutations are sufficient for the emergence of this phenotype and reveal two routes of evolution primarily involving either inactivation or overexpression of the gene encoding heterodisulfide reductase. We propose that the oxygen respiration for energy conservation that sustains the growth of the O2 -evolved strains is associated with a rearrangement of metabolite fluxes, especially NAD+ /NADH, leading to an optimized O2 reduction. These evolved strains are the first sulfate-reducing bacteria that exhibit a demonstrated oxygen respiratory process that enables growth.
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Affiliation(s)
- Marine Schoeffler
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Anne-Laure Gaudin
- Aix Marseille Université, CNRS, LCB, Marseille, France.,GERME SA, Technopôle de Château Gombert, Marseille, France
| | - Fanny Ramel
- Aix Marseille Université, CNRS, LCB, Marseille, France
| | - Odile Valette
- Aix Marseille Université, CNRS, LCB, Marseille, France
| | - Yann Denis
- Aix Marseille Université, CNRS, IMM, Marseille, France
| | - Wagdi Ben Hania
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Agnès Hirschler-Réa
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Alain Dolla
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO, Marseille, France
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