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Foglia F, Hazael R, Meersman F, Wilding MC, Sakai VG, Rogers S, Bove LE, Koza MM, Moulin M, Haertlein M, Forsyth VT, McMillan PF. In Vivo Water Dynamics in Shewanella oneidensis Bacteria at High Pressure. Sci Rep 2019; 9:8716. [PMID: 31213614 PMCID: PMC6581952 DOI: 10.1038/s41598-019-44704-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 05/15/2019] [Indexed: 11/10/2022] Open
Abstract
Following observations of survival of microbes and other life forms in deep subsurface environments it is necessary to understand their biological functioning under high pressure conditions. Key aspects of biochemical reactions and transport processes within cells are determined by the intracellular water dynamics. We studied water diffusion and rotational relaxation in live Shewanella oneidensis bacteria at pressures up to 500 MPa using quasi-elastic neutron scattering (QENS). The intracellular diffusion exhibits a significantly greater slowdown (by −10–30%) and an increase in rotational relaxation times (+10–40%) compared with water dynamics in the aqueous solutions used to resuspend the bacterial samples. Those results indicate both a pressure-induced viscosity increase and slowdown in ionic/macromolecular transport properties within the cells affecting the rates of metabolic and other biological processes. Our new data support emerging models for intracellular organisation with nanoscale water channels threading between macromolecular regions within a dynamically organized structure rather than a homogenous gel-like cytoplasm.
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Affiliation(s)
- Fabrizia Foglia
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Rachael Hazael
- Survivability and Advanced Materials group, Centre for Defence Engineering, Cranfield University at the Defence Academy of the UK, Shrivenham, SN6 8LA, UK
| | - Filip Meersman
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.,Biomolecular & Analytical Mass Spectrometry, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Martin C Wilding
- Materials Engineering, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK
| | | | - Sarah Rogers
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Chilton, OX11 0QX, UK
| | - Livia E Bove
- Dipartimento di Fisica, Università di Roma "La Sapienza", 00185, Roma, Italy.,Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre et Marie Curie, F-75252, Paris, France
| | - Michael Marek Koza
- Institut Laue Langevin, 6 Rue Jules Horowitz, BP 156, 38042, Grenoble, Cedex, France
| | - Martine Moulin
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France
| | - Michael Haertlein
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France
| | - V Trevor Forsyth
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France.,Faculty of Natural Sciences/ISTM, Keele University, Staffordshire, ST5 5BG, UK
| | - Paul F McMillan
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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Pressure as a Limiting Factor for Life. Life (Basel) 2016; 6:life6030034. [PMID: 27548228 PMCID: PMC5041010 DOI: 10.3390/life6030034] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/12/2016] [Accepted: 08/09/2016] [Indexed: 11/17/2022] Open
Abstract
Facts concerning the stability and functioning of key biomolecular components suggest that cellular life should no longer be viable above a few thousand atmospheres (200-300 MPa). However, organisms are seen to survive in the laboratory to much higher pressures, extending into the GPa or even tens of GPa ranges. This is causing main questions to be posed concerning the survival mechanisms of simple to complex organisms. Understanding the ultimate pressure survival of organisms is critical for food sterilization and agricultural products conservation technologies. On Earth the deep biosphere is limited in its extent by geothermal gradients but if life forms exist in cooler habitats elsewhere then survival to greater depths must be considered. The extent of pressure resistance and survival appears to vary greatly with the timescale of the exposure. For example, shock experiments on nanosecond timescales reveal greatly enhanced survival rates extending to higher pressure. Some organisms could survive bolide impacts thus allowing successful transport between planetary bodies. We summarize some of the main questions raised by recent results and their implications for the survival of life under extreme compression conditions and its possible extent in the laboratory and throughout the universe.
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Testemale D, Prat A, Lahera E, Hazemann JL. Novel high-pressure windows made of glass-like carbon for x-ray analysis. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:075115. [PMID: 27475603 DOI: 10.1063/1.4959110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
Original high-pressure glass-like carbon windows developed for x-ray spectroscopy applications are presented. The scientific and technological background of this new technical development is exposed, in particular the limitations of our existing beryllium windows in the context of x-ray absorption spectroscopy (XAS) measurements of solutions with very low solute concentrations at hydrothermal conditions (0.1-200 MPa, 30-600 °C). The benefits of glass-like carbon are exposed, notably its non-crystalline character, the absence of impurities which has been verified by micro-fluorescence laboratory measurements, and its non-toxicity which makes its machining safer. Finite elements mechanical calculations and experimental pressure tests were conducted to determine the pressure limits of windows with two different geometries: cylindrical (thickness 0.5 mm) and inversed-dome shape (thickness 0.5 mm at the tip of the dome). The former break at 150 MPa and the latter show no sign of rupture at 400 MPa. Recent XAS measurements conducted with the new dome shaped windows are presented to show the advantages of the design that allow for the detection of very low concentrations in the transmission mode (down to 30 ppm) and the acquisition of fluorescence XAS spectra in diluted solutions at high pressure. Eventually the perspectives of this original development are discussed.
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Affiliation(s)
- Denis Testemale
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Alain Prat
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Eric Lahera
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Jean-Louis Hazemann
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
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Foglia F, Hazael R, Simeoni GG, Appavou MS, Moulin M, Haertlein M, Trevor Forsyth V, Seydel T, Daniel I, Meersman F, McMillan PF. Water Dynamics in Shewanella oneidensis at Ambient and High Pressure using Quasi-Elastic Neutron Scattering. Sci Rep 2016; 6:18862. [PMID: 26738409 PMCID: PMC4703977 DOI: 10.1038/srep18862] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 11/27/2015] [Indexed: 01/22/2023] Open
Abstract
Quasielastic neutron scattering (QENS) is an ideal technique for studying water transport and relaxation dynamics at pico- to nanosecond timescales and at length scales relevant to cellular dimensions. Studies of high pressure dynamic effects in live organisms are needed to understand Earth's deep biosphere and biotechnology applications. Here we applied QENS to study water transport in Shewanella oneidensis at ambient (0.1 MPa) and high (200 MPa) pressure using H/D isotopic contrast experiments for normal and perdeuterated bacteria and buffer solutions to distinguish intracellular and transmembrane processes. The results indicate that intracellular water dynamics are comparable with bulk diffusion rates in aqueous fluids at ambient conditions but a significant reduction occurs in high pressure mobility. We interpret this as due to enhanced interactions with macromolecules in the nanoconfined environment. Overall diffusion rates across the cell envelope also occur at similar rates but unexpected narrowing of the QENS signal appears between momentum transfer values Q = 0.7-1.1 Å(-1) corresponding to real space dimensions of 6-9 Å. The relaxation time increase can be explained by correlated dynamics of molecules passing through Aquaporin water transport complexes located within the inner or outer membrane structures.
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Affiliation(s)
- Fabrizia Foglia
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, UK
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Rachael Hazael
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Giovanna G. Simeoni
- Heinz Maier-Leibnitz Zentrum (MLZ) and Physics Department, Technisches Universität München, Lichtenbergstrasse 1, D-85748 Garching, Germany
| | - Marie-Sousai Appavou
- Jülich Center for Neutron Sciences at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstrasse 1, D-85748 Garching, Germany
| | - Martine Moulin
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble cedex 9, France
| | - Michael Haertlein
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble cedex 9, France
| | - V. Trevor Forsyth
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble cedex 9, France
- Faculty of Natural Sciences/ISTM, Keele University, Staffordshire ST5 5BG, UK
| | - Tilo Seydel
- Science Division, Institut Laue-Langevin, CS 20156, 71 avenue des Martyrs, 38042 Grenoble cedex 9, France
| | - Isabelle Daniel
- Laboratoire de Géologie de Lyon, UMR 5276, Université Lyon 1-ENS de Lyon-CNRS, 2 rue Raphaël Dubois, 69622 Villeurbanne, France
| | - Filip Meersman
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, UK
- Biomolecular & Analytical Mass Spectrometry, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Paul F. McMillan
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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Picard A, Testemale D, Wagenknecht L, Hazael R, Daniel I. Iron reduction by the deep-sea bacterium Shewanella profunda LT13a under subsurface pressure and temperature conditions. Front Microbiol 2015; 5:796. [PMID: 25653646 PMCID: PMC4301008 DOI: 10.3389/fmicb.2014.00796] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 12/25/2014] [Indexed: 11/13/2022] Open
Abstract
Microorganisms influence biogeochemical cycles from the surface down to the depths of the continental rocks and oceanic basaltic crust. Due to the poor recovery of microbial isolates from the deep subsurface, the influence of physical environmental parameters, such as pressure and temperature, on the physiology and metabolic potential of subsurface inhabitants is not well constrained. We evaluated Fe(III) reduction rates (FeRRs) and viability, measured as colony-forming ability, of the deep-sea piezophilic bacterium Shewanella profunda LT13a over a range of pressures (0–125 MPa) and temperatures (4–37∘C) that included the in situ habitat of the bacterium isolated from deep-sea sediments at 4500 m depth below sea level. S. profunda LT13a was active at all temperatures investigated and at pressures up to 120 MPa at 30∘C, suggesting that it is well adapted to deep-sea and deep sedimentary environments. Average initial cellular FeRRs only slightly decreased with increasing pressure until activity stopped, suggesting that the respiratory chain was not immediately affected upon the application of pressure. We hypothesize that, as pressure increases, the increased energy demand for cell maintenance is not fulfilled, thus leading to a decrease in viability. This study opens up perspectives about energy requirements of cells in the deep subsurface.
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Affiliation(s)
- Aude Picard
- Department of Biogeochemistry, Max Planck Institute for Marine Microbiology Bremen, Germany ; MARUM Center for Marine Environmental Sciences Bremen, Germany ; Center for Applied Geoscience, Eberhard Karls University Tübingen Tübingen, Germany
| | - Denis Testemale
- Institut Néel, Université Grenoble Alpes Grenoble, France ; Institut Néel, Centre National de la Recherche Scientifique Grenoble, France
| | - Laura Wagenknecht
- Department of Biogeochemistry, Max Planck Institute for Marine Microbiology Bremen, Germany
| | - Rachael Hazael
- Christopher Ingold Laboratory, Department of Chemistry, University College London London, UK
| | - Isabelle Daniel
- CNRS, Laboratoire de Géologie de Lyon, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1-Université de Lyon UMR5276, Lyon, France
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Li DB, Cheng YY, Wu C, Li WW, Li N, Yang ZC, Tong ZH, Yu HQ. Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm. Sci Rep 2014; 4:3735. [PMID: 24435070 PMCID: PMC3894562 DOI: 10.1038/srep03735] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 12/05/2013] [Indexed: 11/09/2022] Open
Abstract
In situ reduction of selenite to elemental selenium (Se(0)), by microorganisms in sediments and soils is an important process and greatly affects the environmental distribution and the biological effects of selenium. However, the mechanism behind such a biological process remains unrevealed yet. Here we use Shewanella oneidensis MR-1, a widely-distributed dissimilatory metal-reducing bacterium with a powerful and diverse respiration capability, to evaluate the involvement of anaerobic respiration system in the microbial selenite reduction. With mutants analysis, we identify fumarate reductase FccA as the terminal reductase of selenite in periplasm. Moreover, we find that such a reduction is dependent on central respiration c-type cytochrome CymA. In contrast, nitrate reductase, nitrite reductase, and the Mtr electron transfer pathway do not work as selenite reductases. These findings reveal a previously unrecognized role of anaerobic respiration reductases of S. oneidensis MR-1 in selenite reduction and geochemical cycles of selenium in sediments and soils.
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Affiliation(s)
- Dao-Bo Li
- 1] School of Earth and Space Sciences [2] Department of Chemistry [3]
| | | | | | | | | | - Zong-Chuang Yang
- School of Life Sciences, University of Science & Technology of China, Hefei, 230026, China
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