High hydrostatic pressure adaptive strategies in an obligate piezophile Pyrococcus yayanosii

Gregoire Michoud, Mohamed Jebbar

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Pyrococcus yayanosii CH1, as the first and only obligate piezophilic hyperthermophilic microorganism discovered to date, extends the physical and chemical limits of life on Earth. It was isolated from the Ashadze hydrothermal vent at 4,100 m depth. Multi-omics analyses were performed to study the mechanisms used by the cell to cope with high hydrostatic pressure variations. In silico analyses showed that the P. yayanosii genome is highly adapted to its harsh environment, with a loss of aromatic amino acid biosynthesis pathways and the high constitutive expression of the energy metabolism compared with other non-obligate piezophilic Pyrococcus species. Differential proteomics and transcriptomics analyses identified key hydrostatic pressure-responsive genes involved in translation, chemotaxis, energy metabolism (hydrogenases and formate metabolism) and Clustered Regularly Interspaced Short Palindromic Repeats sequences associated with Cellular apoptosis susceptibility proteins.
Original languageEnglish (US)
JournalScientific Reports
Issue number1
StatePublished - Jun 2 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors would like to thank Didier Chevret for performing the proteomic analysis and Mickael Beauverger for help with protein extraction and gel migration. We are indebted to Helen McCombie for her helpful language improvement. This work was supported by the Agence Nationale de la Recherche (ANR-10-BLAN-1725 01-Living deep) and G.M. was supported by a PhD fellowship from the Conseil Régional de Bretagne.


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