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Deciphering the adaptation strategies of Desulfovibrio piezophilus to hydrostatic pressure through metabolic and transcriptional analyses
Author(s) -
Amrani Amira,
van Helden Jacques,
Bergon Aurélie,
Aouane Aicha,
Ben Hania Wajdi,
Tamburini Christian,
Loriod Béatrice,
Imbert Jean,
Ollivier Bernard,
Pradel Nathalie,
Dolla Alain
Publication year - 2016
Publication title -
environmental microbiology reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.229
H-Index - 69
ISSN - 1758-2229
DOI - 10.1111/1758-2229.12427
Subject(s) - hydrostatic pressure , desulfovibrio , transcriptome , biology , bacteria , biochemistry , autotroph , metabolism , amino acid , chemistry , gene , genetics , gene expression , physics , thermodynamics
Summary Desulfovibrio piezophilus strain C1TLV30 T is a mesophilic piezophilic sulfate‐reducer isolated from Wood Falls at 1700 m depth in the Mediterranean Sea. In this study, we analysed the effect of the hydrostatic pressure on this deep‐sea living bacterium at the physiologic and transcriptomic levels. Our results showed that lactate oxidation and energy metabolism were affected by the hydrostatic pressure. Especially, acetyl‐CoA oxidation pathway and energy conservation through hydrogen and formate recycling would be more important when the hydrostatic pressure is above (26 MPa) than below (0.1 MPa) the optimal one (10 MPa). This work underlines also the role of the amino acid glutamate as a piezolyte for the Desulfovibrio genus. The transcriptomic analysis revealed 146 differentially expressed genes emphasizing energy production and conversion, amino acid transport and metabolism and cell motility and signal transduction mechanisms as hydrostatic pressure responding processes. This dataset allowed us to identify a sequence motif upstream of a subset of differentially expressed genes as putative pressure‐dependent regulatory element.