51
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Hiraoka S, Hirai M, Matsui Y, Makabe A, Minegishi H, Tsuda M, Juliarni, Rastelli E, Danovaro R, Corinaldesi C, Kitahashi T, Tasumi E, Nishizawa M, Takai K, Nomaki H, Nunoura T. Microbial community and geochemical analyses of trans-trench sediments for understanding the roles of hadal environments. ISME JOURNAL 2019; 14:740-756. [PMID: 31827245 PMCID: PMC7031335 DOI: 10.1038/s41396-019-0564-z] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/20/2019] [Accepted: 11/28/2019] [Indexed: 12/28/2022]
Abstract
Hadal trench bottom (>6000 m below sea level) sediments harbor higher microbial cell abundance compared with adjacent abyssal plain sediments. This is supported by the accumulation of sedimentary organic matter (OM), facilitated by trench topography. However, the distribution of benthic microbes in different trench systems has not been well explored yet. Here, we carried out small subunit ribosomal RNA gene tag sequencing for 92 sediment subsamples of seven abyssal and seven hadal sediment cores collected from three trench regions in the northwest Pacific Ocean: the Japan, Izu-Ogasawara, and Mariana Trenches. Tag-sequencing analyses showed specific distribution patterns of several phyla associated with oxygen and nitrate. The community structure was distinct between abyssal and hadal sediments, following geographic locations and factors represented by sediment depth. Co-occurrence network revealed six potential prokaryotic consortia that covaried across regions. Our results further support that the OM cycle is driven by hadal currents and/or rapid burial shapes microbial community structures at trench bottom sites, in addition to vertical deposition from the surface ocean. Our trans-trench analysis highlights intra- and inter-trench distributions of microbial assemblages and geochemistry in surface seafloor sediments, providing novel insights into ultradeep-sea microbial ecology, one of the last frontiers on our planet.
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Affiliation(s)
- Satoshi Hiraoka
- Research Center for Bioscience and Nanoscience (CeBN), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan.
| | - Miho Hirai
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Yohei Matsui
- Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan.,Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan.,Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan
| | - Akiko Makabe
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Hiroaki Minegishi
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan.,Faculty of Science and Engineering, Toyo University, 2100 Kujirai, Kawagoe, 350-8585, Saitama, Japan
| | - Miwako Tsuda
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Juliarni
- Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Eugenio Rastelli
- Stazione Zoologica Anton Dohrn, Villa Comunale, Naples, 80121, Italy
| | - Roberto Danovaro
- Stazione Zoologica Anton Dohrn, Villa Comunale, Naples, 80121, Italy.,Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, 60131, Italy
| | - Cinzia Corinaldesi
- Department of Materials, Environmental Sciences and Urban Planning, Polytechnic University of Marche, Ancona, 60131, Italy
| | - Tomo Kitahashi
- Marine Biodiversity and Environmental Assessment Research Center (BioEnv), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Eiji Tasumi
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Manabu Nishizawa
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Ken Takai
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Hidetaka Nomaki
- Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan
| | - Takuro Nunoura
- Research Center for Bioscience and Nanoscience (CeBN), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Kanagawa, Japan.
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52
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Leygeber M, Lindemann D, Sachs CC, Kaganovitch E, Wiechert W, Nöh K, Kohlheyer D. Analyzing Microbial Population Heterogeneity—Expanding the Toolbox of Microfluidic Single-Cell Cultivations. J Mol Biol 2019; 431:4569-4588. [DOI: 10.1016/j.jmb.2019.04.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 01/15/2023]
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53
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Winnikoff JR, Francis WR, Thuesen EV, Haddock SHD. Combing Transcriptomes for Secrets of Deep-Sea Survival: Environmental Diversity Drives Patterns of Protein Evolution. Integr Comp Biol 2019; 59:786-798. [PMID: 31141128 PMCID: PMC6797910 DOI: 10.1093/icb/icz063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Ctenophores, also known as comb jellies, live across extremely broad ranges of temperature and hydrostatic pressure in the ocean. Because various ctenophore lineages adapted independently to similar environmental conditions, Phylum Ctenophora is an ideal system for the study of protein adaptation to extreme environments in a comparative framework. We present such a study here, using a phylogenetically-informed method to compare sequences of four essential metabolic enzymes across gradients of habitat depth and temperature. This method predicts convergent adaptation to these environmental parameters at the amino acid level, providing a novel view of protein adaptation to extreme environments and demonstrating the power and relevance of phylogenetic comparison applied to multi-species transcriptomic datasets from early-diverging metazoa. Across all four enzymes analyzed, 46 amino acid sites were associated with depth-adaptation, 59 with temperature-adaptation, and 56 with both. Sites predicted to be depth- and temperature-adaptive occurred consistently near Rossmann fold cofactor binding motifs and disproportionately in solvent-exposed regions of the protein. These results suggest that the hydrophobic effect and ligand binding may mediate efficient enzyme function at different hydrostatic pressures and temperatures. Using predicted adaptive site maps, such mechanistic hypotheses can now be tested via mutagenesis.
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Affiliation(s)
- J R Winnikoff
- Monterey Bay Aquarium Research Institute, 7700 Sandholdt Rd., Moss Landing, CA 95039, USA
- Ecology and Evolutionary Biology, University of California at Santa Cruz, 130 McAllister Way, Santa Cruz, CA 95060, USA
| | - W R Francis
- Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - E V Thuesen
- The Evergreen State College, Laboratory I, Olympia, WA 98505, USA
| | - S H D Haddock
- Monterey Bay Aquarium Research Institute, 7700 Sandholdt Rd., Moss Landing, CA 95039, USA
- Ecology and Evolutionary Biology, University of California at Santa Cruz, 130 McAllister Way, Santa Cruz, CA 95060, USA
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54
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Critical review on the numerical modeling of in-situ microbial enhanced oil recovery processes. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107294] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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Abstract
Hyperbaric storage is an innovative preservation method that consists of storing food under pressure, either at room or at low temperature, for time periods of days, weeks, or months. Recent scientific literature shows that hyperbaric storage at room temperature (HS-RT) could be an efficient method for fruit juice preservation. Depending on the level applied, pressure can inhibit and even inactivate the endogenous microflora of the fresh juice, while properly preserving other organoleptic and quality indicators. Even though the method has not yet been implemented in the food industry, its industrial viability has been evaluated from different points of view (product quality, consumer acceptation, vessel design, economic, or environmental, among others). The results reveal that HS-RT is effective in extending the shelf-life of both acidic and low-acidic fruit juices. Moreover, the energetic costs and the carbon footprint of HS-RT are considerably lower than those of refrigeration, therefore, HS-RT could be a reliable and environmentally friendly alternative to conventional cold storage. However, before industrial implementation, much more research is needed to clarify the effects of the storage conditions on the agents that cause fruit juice deterioration.
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56
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Scoma A, Garrido-Amador P, Nielsen SD, Røy H, Kjeldsen KU. The Polyextremophilic Bacterium Clostridium paradoxum Attains Piezophilic Traits by Modulating Its Energy Metabolism and Cell Membrane Composition. Appl Environ Microbiol 2019; 85:e00802-19. [PMID: 31126939 PMCID: PMC6643245 DOI: 10.1128/aem.00802-19] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/13/2019] [Indexed: 11/20/2022] Open
Abstract
In polyextremophiles, i.e., microorganisms growing preferentially under multiple extremes, synergistic effects may allow growth when application of the same extremes alone would not. High hydrostatic pressure (HP) is rarely considered in studies of polyextremophiles, and its role in potentially enhancing tolerance to other extremes remains unclear. Here, we investigated the HP-temperature response in Clostridium paradoxum, a haloalkaliphilic moderately thermophilic endospore-forming bacterium, in the range of 50 to 70°C and 0.1 to 30 MPa. At ambient pressure, growth limits were extended from the previously reported 63°C to 70°C, defining C. paradoxum as an actual thermophile. Concomitant application of high HP and temperature compared to standard conditions (i.e., ambient pressure and 50°C) remarkably enhanced growth, with an optimum growth rate observed at 22 MPa and 60°C. HP distinctively defined C. paradoxum physiology, as at 22 MPa biomass, production increased by 75% and the release of fermentation products per cell decreased by >50% compared to ambient pressure. This metabolic modulation was apparently linked to an energy-preserving mechanism triggered by HP, involving a shift toward pyruvate as the preferred energy and carbon source. High HPs decreased cell damage, as determined by Syto9 and propidium iodide staining, despite no organic solute being accumulated intracellularly. A distinct reduction in carbon chain length of phospholipid fatty acids (PLFAs) and an increase in the amount of branched-chain PLFAs occurred at high HP. Our results describe a multifaceted, cause-and-effect relationship between HP and cell metabolism, stressing the importance of applying HP to define the boundaries for life under polyextreme conditions.IMPORTANCE Hydrostatic pressure (HP) is a fundamental parameter influencing biochemical reactions and cell physiology; however, it is less frequently applied than other factors, such as pH, temperature, and salinity, when studying polyextremophilic microorganisms. In particular, how HP affects microbial tolerance to other and multiple extremes remains unclear. Here, we show that under polyextreme conditions of high pH and temperature, Clostridium paradoxum demonstrates a moderately piezophilic nature as cultures grow to highest cell densities and most efficiently at a specific combination of temperature and HP. Our results highlight the importance of considering HP when exploring microbial physiology under extreme conditions and thus have implications for defining the limits for microbial life in nature and for optimizing industrial bioprocesses occurring under multiple extremes.
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Affiliation(s)
- Alberto Scoma
- Department of Bioscience, Section of Microbiology, Aarhus University, Aarhus, Denmark
| | - Paloma Garrido-Amador
- Department of Bioscience, Section of Microbiology, Aarhus University, Aarhus, Denmark
| | | | - Hans Røy
- Department of Bioscience, Section of Microbiology, Aarhus University, Aarhus, Denmark
| | - Kasper Urup Kjeldsen
- Department of Bioscience, Section of Microbiology, Aarhus University, Aarhus, Denmark
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57
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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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58
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Booker AE, Hoyt DW, Meulia T, Eder E, Nicora CD, Purvine SO, Daly RA, Moore JD, Wunch K, Pfiffner SM, Lipton MS, Mouser PJ, Wrighton KC, Wilkins MJ. Deep-Subsurface Pressure Stimulates Metabolic Plasticity in Shale-Colonizing Halanaerobium spp. Appl Environ Microbiol 2019; 85:e00018-19. [PMID: 30979840 PMCID: PMC6544827 DOI: 10.1128/aem.00018-19] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 04/10/2019] [Indexed: 01/12/2023] Open
Abstract
Bacterial Halanaerobium strains become the dominant persisting microbial community member in produced fluids across geographically distinct hydraulically fractured shales. Halanaerobium is believed to be inadvertently introduced into this environment during the drilling and fracturing process and must therefore tolerate large changes in pressure, temperature, and salinity. Here, we used a Halanaerobium strain isolated from a natural gas well in the Utica Point Pleasant formation to investigate metabolic and physiological responses to growth under high-pressure subsurface conditions. Laboratory incubations confirmed the ability of Halanaerobium congolense strain WG8 to grow under pressures representative of deep shale formations (21 to 48 MPa). Under these conditions, broad metabolic and physiological shifts were identified, including higher abundances of proteins associated with the production of extracellular polymeric substances. Confocal laser scanning microscopy indicated that extracellular polymeric substance (EPS) production was associated with greater cell aggregation when biomass was cultured at high pressure. Changes in Halanaerobium central carbon metabolism under the same conditions were inferred from nuclear magnetic resonance (NMR) and gas chromatography measurements, revealing large per-cell increases in production of ethanol, acetate, and propanol and cessation of hydrogen production. These metabolic shifts were associated with carbon flux through 1,2-propanediol in response to slower fluxes of carbon through stage 3 of glycolysis. Together, these results reveal the potential for bioclogging and corrosion (via organic acid fermentation products) associated with persistent Halanaerobium growth in deep, hydraulically fractured shale ecosystems, and offer new insights into cellular mechanisms that enable these strains to dominate deep-shale microbiomes.IMPORTANCE The hydraulic fracturing of deep-shale formations for hydrocarbon recovery accounts for approximately 60% of U.S. natural gas production. Microbial activity associated with this process is generally considered deleterious due to issues associated with sulfide production, microbially induced corrosion, and bioclogging in the subsurface. Here we demonstrate that a representative Halanaerobium species, frequently the dominant microbial taxon in hydraulically fractured shales, responds to pressures characteristic of the deep subsurface by shifting its metabolism to generate more corrosive organic acids and produce more polymeric substances that cause "clumping" of biomass. While the potential for increased corrosion of steel infrastructure and clogging of pores and fractures in the subsurface may significantly impact hydrocarbon recovery, these data also offer new insights for microbial control in these ecosystems.
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Affiliation(s)
- Anne E Booker
- Department of Microbiology, Ohio State University, Columbus, Ohio, USA
| | - David W Hoyt
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Tea Meulia
- College of Food, Agricultural, and Environmental Sciences, Ohio State University, Columbus, Ohio, USA
| | - Elizabeth Eder
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Carrie D Nicora
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Samuel O Purvine
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Rebecca A Daly
- Department of Microbiology, Ohio State University, Columbus, Ohio, USA
| | - Joseph D Moore
- DowDuPont Industrial Biosciences, Wilmington, Delaware, USA
| | - Kenneth Wunch
- DowDuPont Industrial Biosciences, Wilmington, Delaware, USA
| | - Susan M Pfiffner
- Center for Environmental Biotechnology, University of Tennessee, Knoxville, Tennessee, USA
| | - Mary S Lipton
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Paula J Mouser
- Department of Civil and Environmental Engineering, University of New Hampshire, Durham, New Hampshire, USA
| | - Kelly C Wrighton
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Michael J Wilkins
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, Colorado, USA
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59
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Gu HJ, Sun QL, Luo JC, Zhang J, Sun L. A First Study of the Virulence Potential of a Bacillus subtilis Isolate From Deep-Sea Hydrothermal Vent. Front Cell Infect Microbiol 2019; 9:183. [PMID: 31214515 PMCID: PMC6554283 DOI: 10.3389/fcimb.2019.00183] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 05/13/2019] [Indexed: 02/05/2023] Open
Abstract
Bacillus subtilis is the best studied Gram-positive bacterium, primarily as a model of cell differentiation and industrial exploitation. To date, little is known about the virulence of B. subtilis. In this study, we examined the virulence potential of a B. subtilis strain (G7) isolated from the Iheya North hydrothermal field of Okinawa Trough. G7 is aerobic, motile, endospore-forming, and requires NaCl for growth. The genome of G7 is composed of one circular chromosome of 4,216,133 base pairs with an average GC content of 43.72%. G7 contains 4,416 coding genes, 27.5% of which could not be annotated, and the remaining 72.5% were annotated with known or predicted functions in 25 different COG categories. Ten sets of 23S, 5S, and 16S ribosomal RNA operons, 86 tRNA and 14 sRNA genes, 50 tandem repeats, 41 mini-satellites, one microsatellite, and 42 transposons were identified in G7. Comparing to the genome of the B. subtilis wild type strain NCIB 3610T, G7 genome contains many genomic translocations, inversions, and insertions, and twice the amount of genomic Islands (GIs), with 42.5% of GI genes encoding hypothetical proteins. G7 possesses abundant putative virulence genes associated with adhesion, invasion, dissemination, anti-phagocytosis, and intracellular survival. Experimental studies showed that G7 was able to cause mortality in fish and mice following intramuscular/intraperitoneal injection, resist the killing effect of serum complement, and replicate in mouse macrophages and fish peripheral blood leukocytes. Taken together, our study indicates that G7 is a B. subtilis isolate with unique genetic features and can be lethal to vertebrate animals once being introduced into the animals by artificial means. These results provide the first insight into the potential harmfulness of deep-sea B. subtilis.
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Affiliation(s)
- Han-Jie Gu
- CAS Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Qing-Lei Sun
- CAS Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jing-Chang Luo
- CAS Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Jian Zhang
- CAS Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
| | - Li Sun
- CAS Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
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60
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Ribeiro H, Martins A, Gonçalves M, Guedes M, Tomasino MP, Dias N, Dias A, Mucha AP, Carvalho MF, Almeida CMR, Ramos S, Almeida JM, Silva E, Magalhães C. Development of an autonomous biosampler to capture in situ aquatic microbiomes. PLoS One 2019; 14:e0216882. [PMID: 31091277 PMCID: PMC6519839 DOI: 10.1371/journal.pone.0216882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 04/30/2019] [Indexed: 11/18/2022] Open
Abstract
The importance of planktonic microbial communities is well acknowledged, since they are fundamental for several natural processes of aquatic ecosystems. Microorganisms naturally control the flux of nutrients, and also degrade and recycle anthropogenic organic and inorganic contaminants. Nevertheless, climate change effects and/or the runoff of nutrients/pollutants can affect the equilibrium of natural microbial communities influencing the occurrence of microbial pathogens and/or microbial toxin producers, which can compromise ecosystem environmental status. Therefore, improved microbial plankton monitoring is essential to better understand how these communities respond to environmental shifts. The study of marine microbial communities typically involves highly cost and time-consuming sampling procedures, which can limit the frequency of sampling and data availability. In this context, we developed and validated an in situ autonomous biosampler (IS-ABS) able to collect/concentrate in situ planktonic communities of different size fractions (targeting prokaryotes and unicellular eukaryotes) for posterior genomic, metagenomic, and/or transcriptomic analysis at a home laboratory. The IS-ABS field prototype is a small size and compact system able to operate up to 150 m depth. Water is pumped by a micropump (TCS MG2000) through a hydraulic circuit that allows in situ filtration of environmental water in one or more Sterivex filters placed in a filter cartridge. The IS-ABS also includes an application to program sampling definitions, allowing pre-setting configuration of the sampling. The efficiency of the IS-ABS was tested against traditional laboratory filtration standardized protocols. Results showed a good performance in terms of DNA recovery, as well as prokaryotic (16S rDNA) and eukaryotic (18S rDNA) community diversity analysis, using either methodologies. The IS-ABS automates the process of collecting environmental DNA, and is suitable for integration in water observation systems, what will contribute to substantially increase biological surveillances. Also, the use of highly sensitive genomic approaches allows a further study of the diversity and functions of whole or specific microbial communities.
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Affiliation(s)
- Hugo Ribeiro
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS-UP), University of Porto, Porto, Portugal
- * E-mail:
| | - Alfredo Martins
- INESC TEC–INESC Technology and Science, Porto, Portugal
- ISEP–School of Engineering, Polytechnic Institute of Porto, Porto, Portugal
| | | | | | - Maria Paola Tomasino
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
| | - Nuno Dias
- INESC TEC–INESC Technology and Science, Porto, Portugal
- ISEP–School of Engineering, Polytechnic Institute of Porto, Porto, Portugal
| | - André Dias
- INESC TEC–INESC Technology and Science, Porto, Portugal
- ISEP–School of Engineering, Polytechnic Institute of Porto, Porto, Portugal
| | - Ana Paula Mucha
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
| | - Maria F. Carvalho
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
| | - C. Marisa R. Almeida
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
| | - Sandra Ramos
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
- Institute of Estuarine and Coastal Studies, University of Hull, Hull, United Kingdom
| | - José Miguel Almeida
- INESC TEC–INESC Technology and Science, Porto, Portugal
- ISEP–School of Engineering, Polytechnic Institute of Porto, Porto, Portugal
| | - Eduardo Silva
- INESC TEC–INESC Technology and Science, Porto, Portugal
- ISEP–School of Engineering, Polytechnic Institute of Porto, Porto, Portugal
| | - Catarina Magalhães
- CIIMAR–Interdisciplinary Center of Marine and Environmental Research, University of Porto, Av. General Norton de Matos s/n, Matosinhos, Portugal
- FCUP–Faculty of Sciences of University of Porto, Porto, Portugal
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61
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Winter R. Interrogating the Structural Dynamics and Energetics of Biomolecular Systems with Pressure Modulation. Annu Rev Biophys 2019; 48:441-463. [DOI: 10.1146/annurev-biophys-052118-115601] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
High hydrostatic pressure affects the structure, dynamics, and stability of biomolecular systems and is a key parameter in the context of the exploration of the origin and the physical limits of life. This review lays out the conceptual framework for exploring the conformational fluctuations, dynamical properties, and activity of biomolecular systems using pressure perturbation. Complementary pressure-jump relaxation studies are useful tools to study the kinetics and mechanisms of biomolecular phase transitions and structural transformations, such as membrane fusion or protein and nucleic acid folding. Finally, the advantages of using pressure to explore biomolecular assemblies and modulate enzymatic reactions are discussed.
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Affiliation(s)
- Roland Winter
- Faculty of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44227 Dortmund, Germany
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62
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Schummel PH, Anders C, Jaworek MW, Winter R. Cosolvent and Crowding Effects on the Temperature- and Pressure-Dependent Dissociation Process of the α/β-Tubulin Heterodimer. Chemphyschem 2019; 20:1098-1109. [PMID: 30829441 DOI: 10.1002/cphc.201900115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/01/2019] [Indexed: 11/09/2022]
Abstract
Tubulin is one of the main components of the cytoskeleton of eukaryotic cells. The formation of microtubules depends strongly on environmental and solution conditions, and has been found to be among the most pressure sensitive processes in vivo. We explored the effects of different types of cosolvents, such as trimethylamine-N-oxide (TMAO), sucrose and urea, and crowding agents to mimic cell-like conditions, on the temperature and pressure stability of the building block of microtubules, i. e. the α/β-tubulin heterodimer. To this end, fluorescence and FTIR spectroscopy, differential scanning and pressure perturbation calorimetry as well as fluorescence anisotropy and correlation spectroscopies were applied. The pressure and temperature of dissociation of α/β-tubulin as well as the underlying thermodynamic parameters upon dissociation, such as volume and enthalpy changes, have been determined for the different solution conditions. The temperature and pressure of dissociation of the α/β-tubulin heterodimer and hence its stability increases dramatically in the presence of TMAO and the nanocrowder sucrose. We show that by adjusting the levels of compatible cosolutes and crowders, cells are able to withstand deteriorating effects of pressure even up to the kbar-range.
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Affiliation(s)
- Paul Hendrik Schummel
- Faculty of Chemistry and Chemical Biology, Physical Chemistry-Biophysical Chemistry, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany
| | - Christian Anders
- Faculty of Chemistry and Chemical Biology, Physical Chemistry-Biophysical Chemistry, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany
| | - Michel W Jaworek
- Faculty of Chemistry and Chemical Biology, Physical Chemistry-Biophysical Chemistry, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany
| | - Roland Winter
- Faculty of Chemistry and Chemical Biology, Physical Chemistry-Biophysical Chemistry, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany
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63
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Reduction of Zygosaccharomyces rouxii Population in Concentrated Grape Juices by Thermal Pasteurization and Hydrostatic High Pressure Processing. FOOD BIOPROCESS TECH 2019. [DOI: 10.1007/s11947-019-02251-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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64
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Abstract
The discovery of microbial communities in extreme conditions that would seem hostile to life leads to the question of how the molecules making up these microbes can maintain their structure and function. While microbes that live under extremes of temperature have been heavily studied, those that live under extremes of pressure, or "piezophiles", are now increasingly being studied because of advances in sample collection and high-pressure cells for biochemical and biophysical measurements. Here, adaptations of enzymes in piezophiles against the effects of pressure are discussed in light of recent experimental and computational studies. However, while concepts from studies of enzymes from temperature extremophiles can provide frameworks for understanding adaptations by piezophile enzymes, the effects of temperature and pressure on proteins differ in significant ways. Thus, the state of the knowledge of adaptation in piezophile enzymes is still in its infancy and many more experiments and computational studies on different enzymes from a variety of piezophiles are needed.
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Affiliation(s)
- Toshiko Ichiye
- Department of Chemistry, Georgetown University, Washington, DC, 20057, United States
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65
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Schottroff F, Fröhling A, Zunabovic-Pichler M, Krottenthaler A, Schlüter O, Jäger H. Sublethal Injury and Viable but Non-culturable (VBNC) State in Microorganisms During Preservation of Food and Biological Materials by Non-thermal Processes. Front Microbiol 2018; 9:2773. [PMID: 30515140 PMCID: PMC6255932 DOI: 10.3389/fmicb.2018.02773] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 10/29/2018] [Indexed: 11/13/2022] Open
Abstract
The viable but non-culturable (VBNC) state, as well as sublethal injury of microorganisms pose a distinct threat to food safety, as the use of traditional, culture-based microbiological analyses might lead to an underestimation or a misinterpretation of the product's microbial status and recovery phenomena of microorganisms may occur. For thermal treatments, a large amount of data and experience is available and processes are designed accordingly. In case of innovative inactivation treatments, however, there are still several open points with relevance for the investigation of inactivation mechanisms as well as for the application and validation of the preservation processes. Thus, this paper presents a comprehensive compilation of non-thermal preservation technologies, i.e., high hydrostatic pressure (HHP), pulsed electric fields (PEFs), pulsed light (PL), and ultraviolet (UV) radiation, as well as cold plasma (CP) treatments. The basic technological principles and the cellular and molecular mechanisms of action are described. Based on this, appropriate analytical methods are outlined, i.e., direct viable count, staining, and molecular biological methods, in order to enable the differentiation between viable and dead cells, as well as the possible occurrence of an intermediate state. Finally, further research needs are outlined.
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Affiliation(s)
- Felix Schottroff
- Institute of Food Technology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Antje Fröhling
- Quality and Safety of Food and Feed, Leibniz Institute for Agricultural Engineering and Bioeconomy, Potsdam, Germany
| | | | - Anna Krottenthaler
- Institute of Food Technology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Oliver Schlüter
- Quality and Safety of Food and Feed, Leibniz Institute for Agricultural Engineering and Bioeconomy, Potsdam, Germany
| | - Henry Jäger
- Institute of Food Technology, University of Natural Resources and Life Sciences, Vienna, Austria
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66
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Perez Calderon LJ, Gontikaki E, Potts LD, Shaw S, Gallego A, Anderson JA, Witte U. Pressure and temperature effects on deep-sea hydrocarbon-degrading microbial communities in subarctic sediments. Microbiologyopen 2018; 8:e00768. [PMID: 30444300 PMCID: PMC6562134 DOI: 10.1002/mbo3.768] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/20/2018] [Accepted: 10/22/2018] [Indexed: 12/24/2022] Open
Abstract
The Hatton-Rockall Basin (North-East Atlantic) is an area with potential for deep-sea (2,900 m) hydrocarbon exploration. Following the Deepwater Horizon oil spill, many investigations into the responses of sediment microbial communities to oil pollution have been undertaken. However, hydrostatic pressure is a parameter that is often omitted due to the technical difficulties associated with conducting experiments at high pressure (>10 MPa). In this study, sediments from 2,900 m in the Hatton-Rockall Basin, following a one-week decompression period in a temperature-controlled room at 5°C, were incubated in factorial combinations of 0.1 and 30 MPa, 5 and 20°C, and contamination with a hydrocarbon mixture or uncontaminated controls to evaluate the effect of these environmental variables on the bacterial community composition. Our results revealed varying effects of pressure, temperature, and oil contamination on the composition of the bacterial community within the sediment. Temperature was the strongest determinant of differences in the bacterial community structure between samples followed by pressure. Oil contamination did not exert a strong change in the sediment bacterial community structure when pressure and temperature conditions were held at in situ levels (30 MPa and 5°C). The γ-proteobacteria Pseudomonas and Colwellia, and several Bacteroidetes dominated communities at 30 MPa. In contrast, hydrocarbon degraders such as Halomonas, Alcanivorax, and Marinobacter decreased in relative abundance at the same pressure. This study highlights the importance of considering hydrostatic pressure in ex situ investigations into hydrocarbon-degrading deepwater microbial communities.
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Affiliation(s)
- Luis J Perez Calderon
- Institute of Biological and Environmental Science, University of Aberdeen, Aberdeen, UK.,Surface Chemistry and Catalysis Group, Materials and Chemical Engineering, School of Engineering, University of Aberdeen, Aberdeen, UK.,Marine Laboratory Aberdeen, Marine Scotland Science, Aberdeen, UK
| | - Evangelia Gontikaki
- Institute of Biological and Environmental Science, University of Aberdeen, Aberdeen, UK
| | - Lloyd D Potts
- Institute of Biological and Environmental Science, University of Aberdeen, Aberdeen, UK.,Surface Chemistry and Catalysis Group, Materials and Chemical Engineering, School of Engineering, University of Aberdeen, Aberdeen, UK
| | - Sophie Shaw
- Centre for Genome Enabled Biology and Medicine, University of Aberdeen, Aberdeen, UK
| | | | - James A Anderson
- Surface Chemistry and Catalysis Group, Materials and Chemical Engineering, School of Engineering, University of Aberdeen, Aberdeen, UK
| | - Ursula Witte
- Institute of Biological and Environmental Science, University of Aberdeen, Aberdeen, UK
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67
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Ferreira RM, Mota MJ, Lopes RP, Sousa S, Gomes AM, Delgadillo I, Saraiva JA. Adaptation of Saccharomyces cerevisiae to high pressure (15, 25 and 35 MPa) to enhance the production of bioethanol. Food Res Int 2018; 115:352-359. [PMID: 30599952 DOI: 10.1016/j.foodres.2018.11.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 10/28/2018] [Accepted: 11/14/2018] [Indexed: 01/21/2023]
Abstract
Saccharomyces cerevisiae is a yeast of great importance in many industries and it has been frequently used to produce food products and beverages. More recently, other uses have also been described for this microorganism, such as the production of bioethanol, as a clean, renewable and sustainable alternative fuel. High pressure processing (HPP) is a technology that has attracted a lot of interest and is increasingly being used in the food industry as a non-thermal method of food processing. However, other applications of high pressure (HP) are being studied with this technology in different areas, for example, for fermentation processes, because microbial cells can resist to pressure sub-lethal levels, due to the development of different adaptation mechanisms. The present work intended to study the adaptation of S. cerevisiae to high pressure, using consecutive cycles of fermentation under pressure (at sub-lethal levels), in an attempt to enhance the production of bioethanol. In this context, three pressure levels (15, 25 and 35 MPa) were tested, with each of them showing different effects on S. cerevisiae fermentation behavior. After each cycle at 15 and 25 MPa, both cell growth and ethanol production showed a tendency to increase, suggesting the adaptation of S. cerevisiae to these pressure levels. In fact, at the end of the 4th cycle, the ethanol production was higher under pressure than at atmospheric pressure (0.1 MPa) (8.75 g.L-1 and 10.69 g.L-1 at 15 and 25 MPa, respectively, compared to 8.02 g.L-1 at atmospheric pressure). However, when the pressure was increased to 35 MPa, cell growth and bioethanol production decreased, with minimal production after the 4 consecutive fermentation cycles. In general, the results of this work suggest that consecutive cycles of fermentation under sub-lethal pressure conditions (15 and 25 MPa) can stimulate adaptation to pressure and improve the bioethanol production capacity by S. cerevisiae; hence, this technology can be used to increase rates, yields and productivities of alcoholic fermentation.
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Affiliation(s)
- Ricardo M Ferreira
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Maria J Mota
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Rita P Lopes
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Sérgio Sousa
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Ana M Gomes
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374 Porto, Portugal
| | - Ivonne Delgadillo
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Jorge A Saraiva
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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68
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Lehofer B, Golub M, Kornmueller K, Kriechbaum M, Martinez N, Nagy G, Kohlbrecher J, Amenitsch H, Peters J, Prassl R. High Hydrostatic Pressure Induces a Lipid Phase Transition and Molecular Rearrangements in Low-Density Lipoprotein Nanoparticles. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION : MEASUREMENT AND DESCRIPTION OF PARTICLE PROPERTIES AND BEHAVIOR IN POWDERS AND OTHER DISPERSE SYSTEMS 2018; 35:1800149. [PMID: 30283212 PMCID: PMC6166783 DOI: 10.1002/ppsc.201800149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Indexed: 06/08/2023]
Abstract
Low-density lipoproteins (LDL) are natural lipid transporter in human plasma whose chemically modified forms contribute to the progression of atherosclerosis and cardiovascular diseases accounting for a vast majority of deaths in westernized civilizations. For the development of new treatment strategies, it is important to have a detailed picture of LDL nanoparticles on a molecular basis. Through the combination of X-ray and neutron small-angle scattering (SAS) techniques with high hydrostatic pressure (HHP) this study describes structural features of normolipidemic, triglyceride-rich and oxidized forms of LDL. Due to the different scattering contrasts for X-rays and neutrons, information on the effects of HHP on the internal structure determined by lipid rearrangements and changes in particle shape becomes accessible. Independent pressure and temperature variations provoke a phase transition in the lipid core domain. With increasing pressure an inter-related anisotropic deformation and flattening of the particle are induced. All LDL nanoparticles maintain their structural integrity even at 3000 bar and show a reversible response toward pressure variations. The present work depicts the complementarity of pressure and temperature as independent thermodynamic parameters and introduces HHP as a tool to study molecular assembling and interaction processes in distinct lipoprotein particles in a nondestructive manner.
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Affiliation(s)
- Bernhard Lehofer
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
| | - Maksym Golub
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS + CEA, IBS, 38000 Grenoble, France
| | - Karin Kornmueller
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
| | - Manfred Kriechbaum
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Nicolas Martinez
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS + CEA, IBS, 38000 Grenoble, France
| | - Gergely Nagy
- Paul Scherrer Institut, 5232 Villigen, Switzerland; Wigner Research Centre for Physics, 1121 Budapest, Hungary; European Spallation Source ERIC, 22363 Lund, Sweden
| | | | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Judith Peters
- Institut Laue-Langevin, 71 avenue des Martyrs, 38044 Grenoble, France; Univ. Grenoble Alpes, CNRS, LiPhy, 38000 Grenoble, France
| | - Ruth Prassl
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging Biophysics, Medical University of Graz, Neue Stiftingtalstraße 6/IV, 8010 Graz, Austria
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69
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Williamson AJ, Carlson HK, Kuehl JV, Huang LL, Iavarone AT, Deutschbauer A, Coates JD. Dissimilatory Sulfate Reduction Under High Pressure by Desulfovibrio alaskensis G20. Front Microbiol 2018; 9:1465. [PMID: 30050504 PMCID: PMC6052904 DOI: 10.3389/fmicb.2018.01465] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/12/2018] [Indexed: 11/17/2022] Open
Abstract
Biosouring results from production of H2S by sulfate-reducing microorganisms (SRMs) in oil reservoirs. H2S is toxic, corrosive, and explosive, and as such, represents a significant threat to personnel, production facilities, and transportation pipelines. Since typical oil reservoir pressures can range from 10 to 50 MPa, understanding the role that pressure plays in SRM metabolism is important to improving souring containment strategies. To explore the impact of pressure, we grew an oil-field SRM isolate, Desulfovibrio alaskensis G20, under a range of pressures (0.1–14 MPa) at 30°C. The observed microbial growth rate was an inverse function of pressure with an associated slight reduction in sulfate and lactate consumption rate. Competitive fitness experiments with randomly bar-coded transposon mutant library sequencing (RB-TnSeq) identified several genes associated with flagellar biosynthesis and assembly that were important at high pressure. The fitness impact of specific genes was confirmed using individual transposon mutants. Confocal microscopy revealed that enhanced cell aggregation occurs at later stages of growth under pressure. We also assessed the effect of pressure on SRM inhibitor potency. Dose-response experiments showed a twofold decrease in the sensitivity of D. alaskensis to the antibiotic chloramphenicol at 14 MPa. Fortuitously, pressure had no significant influence on the inhibitory potency of the common souring controlling agent nitrate, or the emerging SRM inhibitors perchlorate, monofluorophosphate, or zinc pyrithione. Our findings improve the conceptual model of microbial sulfate reduction in high-pressure environments and the influence of pressure on souring inhibitor efficacy.
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Affiliation(s)
- Adam J Williamson
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Hans K Carlson
- Energy Biosciences Institute, Berkeley, CA, United States
| | - Jennifer V Kuehl
- Environmental Genomics and Systems Biology, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Leah L Huang
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, United States
| | - Anthony T Iavarone
- QB3/Chemistry Mass Spectrometry Facility, University of California, Berkeley, Berkeley, CA, United States
| | - Adam Deutschbauer
- Environmental Genomics and Systems Biology, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - John D Coates
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA, United States.,Energy Biosciences Institute, Berkeley, CA, United States
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70
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Myka KK, McGlynn P, Ferguson GP. Insights into the initiation of chromosome II replication of the pressure-loving deep-sea bacterium Photobacterium profundum SS9. MICROBIOLOGY-SGM 2018; 164:920-933. [PMID: 29757128 DOI: 10.1099/mic.0.000663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
How DNA metabolism is adapted to survival of organisms such as the bacterium Photobacterium profundum SS9 at high pressure is unknown. Previously, a high pressure-sensitive P. profundum SS9 transposon mutant (FL31) was identified, with an insertion in a putative rctB gene. The Vibrio cholerae RctB protein is essential for replication initiation at the origin of chromosome II, oriCII. Using a plasmid-based system in E. coli we have identified the replication origin of chromosome II from P. profundum SS9 and have shown that the putative rctB gene, disrupted in FL31, is essential for oriCII function. Moreover, we found that a region corresponding to the V. cholerae oriCII incompatibility region (incII) exerts an inhibitory effect on P. profundum oriCII. The truncated rctB gene in FL31 confers insensitivity to incII inhibition, indicating that the C-terminus of RctB is important for the negative regulation of replication. The RctB proteins of V. cholerae and P. profundum are partially interchangeable, but full functionality is achieved only with the cognate origin. Our findings provide the first characterization of the replication origin of chromosome II in a deep-sea bacterium.
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Affiliation(s)
- Kamila K Myka
- Present address: Department of Microbiology and Immunology, Columbia University Medical Center, New York, NY 10032, USA.,School of Medicine and Dentistry, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Peter McGlynn
- School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.,Present address: Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Gail P Ferguson
- School of Medicine and Dentistry, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
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71
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Brown A, Hauton C, Stratmann T, Sweetman A, van Oevelen D, Jones DOB. Metabolic rates are significantly lower in abyssal Holothuroidea than in shallow-water Holothuroidea. ROYAL SOCIETY OPEN SCIENCE 2018; 5:172162. [PMID: 29892403 PMCID: PMC5990736 DOI: 10.1098/rsos.172162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Recent analyses of metabolic rates in fishes, echinoderms, crustaceans and cephalopods have concluded that bathymetric declines in temperature- and mass-normalized metabolic rate do not result from resource-limitation (e.g. oxygen or food/chemical energy), decreasing temperature or increasing hydrostatic pressure. Instead, based on contrasting bathymetric patterns reported in the metabolic rates of visual and non-visual taxa, declining metabolic rate with depth is proposed to result from relaxation of selection for high locomotory capacity in visual predators as light diminishes. Here, we present metabolic rates of Holothuroidea, a non-visual benthic and benthopelagic echinoderm class, determined in situ at abyssal depths (greater than 4000 m depth). Mean temperature- and mass-normalized metabolic rate did not differ significantly between shallow-water (less than 200 m depth) and bathyal (200-4000 m depth) holothurians, but was significantly lower in abyssal (greater than 4000 m depth) holothurians than in shallow-water holothurians. These results support the dominance of the visual interactions hypothesis at bathyal depths, but indicate that ecological or evolutionary pressures other than biotic visual interactions contribute to bathymetric variation in holothurian metabolic rates. Multiple nonlinear regression assuming power or exponential models indicates that in situ hydrostatic pressure and/or food/chemical energy availability are responsible for variation in holothurian metabolic rates. Consequently, these results have implications for modelling deep-sea energetics and processes.
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Affiliation(s)
- Alastair Brown
- Ocean and Earth Science, University of Southampton, National Oceanography Centre Southampton, European Way, Southampton SO14 3ZH, UK
| | - Chris Hauton
- Ocean and Earth Science, University of Southampton, National Oceanography Centre Southampton, European Way, Southampton SO14 3ZH, UK
| | - Tanja Stratmann
- Department of Estuarine and Delta Systems, Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), and Utrecht University, PO Box 140, 4400 AC Yerseke, The Netherlands
| | - Andrew Sweetman
- The Sir Charles Lyell Centre for Earth and Marine Science and Technology, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Dick van Oevelen
- Department of Estuarine and Delta Systems, Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), and Utrecht University, PO Box 140, 4400 AC Yerseke, The Netherlands
| | - Daniel O. B. Jones
- National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK
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72
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Yamamoto K, Kimura K, Inaoka T, Morimatsu K, Nakaura Y. Injury and Recovery in Bacterial Inactivation Induced by High Hydrostatic Pressure. J JPN SOC FOOD SCI 2018. [DOI: 10.3136/nskkk.65.154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kazutaka Yamamoto
- Food Research Institute, National Agriculture and Food Research Organization
| | - Keitarou Kimura
- Food Research Institute, National Agriculture and Food Research Organization
| | - Takashi Inaoka
- Food Research Institute, National Agriculture and Food Research Organization
| | | | - Yoshiko Nakaura
- Food Research Institute, National Agriculture and Food Research Organization
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73
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Nishiyama M. High-pressure microscopy for tracking dynamic properties of molecular machines. Biophys Chem 2017; 231:71-78. [DOI: 10.1016/j.bpc.2017.03.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/24/2017] [Accepted: 03/27/2017] [Indexed: 01/29/2023]
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74
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Ding W, Palaiokostas M, Shahane G, Wang W, Orsi M. Effects of High Pressure on Phospholipid Bilayers. J Phys Chem B 2017; 121:9597-9606. [PMID: 28926699 DOI: 10.1021/acs.jpcb.7b07119] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The response of lipid membranes to changes in external pressure is important for many biological processes, and it can also be exploited for technological applications. In this work, we employ all-atom molecular dynamics simulations to characterize the changes in the physical properties of phospholipid bilayers brought about by high pressure (1000 bar). In particular, we study how the response differs, in relation to different chain unsaturation levels, by comparing monounsaturated 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC) and biunsaturated dioleoyl-phosphatidylcholine (DOPC) bilayers. Various structural, mechanical, and dynamical features are found to be altered by the pressure increase in both bilayers. Notably, for most properties, including bilayer area and thickness, lipid order parameters, lateral pressure profile, and curvature frustration energy, we observe significantly more pronounced effects for monounsaturated POPC than biunsaturated DOPC. Possible biological implications of the results obtained are discussed, especially in relation to how different lipids can control the structure and function of membrane proteins.
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Affiliation(s)
- Wei Ding
- School of Engineering & Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, U.K
| | - Michail Palaiokostas
- School of Engineering & Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, U.K
| | - Ganesh Shahane
- School of Engineering & Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, U.K
| | - Wen Wang
- School of Engineering & Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, U.K
| | - Mario Orsi
- Department of Applied Sciences, University of the West of England , Coldharbour Lane, Bristol BS16 1QY, U.K
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75
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Schott AS, Behr J, Geißler AJ, Kuster B, Hahne H, Vogel RF. Quantitative Proteomics for the Comprehensive Analysis of Stress Responses of Lactobacillus paracasei subsp. paracasei F19. J Proteome Res 2017; 16:3816-3829. [PMID: 28862000 DOI: 10.1021/acs.jproteome.7b00474] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Lactic acid bacteria are broadly employed as starter cultures in the manufacture of foods. Upon technological preparation, they are confronted with drying stress that amalgamates numerous stress conditions resulting in losses of fitness and survival. To better understand and differentiate physiological stress responses, discover general and specific markers for the investigated stress conditions, and predict optimal preconditioning for starter cultures, we performed a comprehensive genomic and quantitative proteomic analysis of a commonly used model system, Lactobacillus paracasei subsp. paracasei TMW 1.1434 (isogenic with F19) under 11 typical stress conditions, including among others oxidative, osmotic, pH, and pressure stress. We identified and quantified >1900 proteins in triplicate analyses, representing 65% of all genes encoded in the genome. The identified genes were thoroughly annotated in terms of subcellular localization prediction and biological functions, suggesting unbiased and comprehensive proteome coverage. In total, 427 proteins were significantly differentially expressed in at least one condition. Most notably, our analysis suggests that optimal preconditioning toward drying was predicted to be alkaline and high-pressure stress preconditioning. Taken together, we believe the presented strategy may serve as a prototypic example for the analysis and utility of employing quantitative-mass-spectrometry-based proteomics to study bacterial physiology.
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Affiliation(s)
- Ann-Sophie Schott
- Chair of Technical Microbiology, Technische Universität München , Freising 85354, Germany
| | - Jürgen Behr
- Chair of Technical Microbiology, Technische Universität München , Freising 85354, Germany.,Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), Freising 85354, Germany
| | - Andreas J Geißler
- Chair of Technical Microbiology, Technische Universität München , Freising 85354, Germany
| | - Bernhard Kuster
- Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), Freising 85354, Germany.,Chair of Proteomics and Bioanalytics, Technische Universität München , Freising 85354, Germany.,Center for Integrated Protein Science Munich, Freising 85354, Germany
| | | | - Rudi F Vogel
- Chair of Technical Microbiology, Technische Universität München , Freising 85354, Germany
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76
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Brewer PG, Peltzer ET. Depth perception: the need to report ocean biogeochemical rates as functions of temperature, not depth. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2016.0319. [PMID: 28784710 PMCID: PMC5559415 DOI: 10.1098/rsta.2016.0319] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/21/2017] [Indexed: 05/13/2023]
Abstract
For over 50 years, ocean scientists have oddly represented ocean oxygen consumption rates as a function of depth but not temperature in most biogeochemical models. This unique tradition or tactic inhibits useful discussion of climate change impacts, where specific and fundamental temperature-dependent terms are required. Tracer-based determinations of oxygen consumption rates in the deep sea are nearly universally reported as a function of depth in spite of their well-known microbial basis. In recent work, we have shown that a carefully determined profile of oxygen consumption rates in the Sargasso Sea can be well represented by a classical Arrhenius function with an activation energy of 86.5 kJ mol-1, leading to a Q10 of 3.63. This indicates that for 2°C warming, we will have a 29% increase in ocean oxygen consumption rates, and for 3°C warming, a 47% increase, potentially leading to large-scale ocean hypoxia should a sufficient amount of organic matter be available to microbes. Here, we show that the same principles apply to a worldwide collation of tracer-based oxygen consumption rate data and that some 95% of ocean oxygen consumption is driven by temperature, not depth, and thus will have a strong climate dependence. The Arrhenius/Eyring equations are no simple panacea and they require a non-equilibrium steady state to exist. Where transient events are in progress, this stricture is not obeyed and we show one such possible example.This article is part of the themed issue 'Ocean ventilation and deoxygenation in a warming world'.
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Affiliation(s)
- Peter G Brewer
- Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USA
| | - Edward T Peltzer
- Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USA
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77
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Brewer PG, Peltzer ET. Depth perception: the need to report ocean biogeochemical rates as functions of temperature, not depth. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017. [PMID: 28784710 DOI: 10.1098/rsta.2017.0319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
For over 50 years, ocean scientists have oddly represented ocean oxygen consumption rates as a function of depth but not temperature in most biogeochemical models. This unique tradition or tactic inhibits useful discussion of climate change impacts, where specific and fundamental temperature-dependent terms are required. Tracer-based determinations of oxygen consumption rates in the deep sea are nearly universally reported as a function of depth in spite of their well-known microbial basis. In recent work, we have shown that a carefully determined profile of oxygen consumption rates in the Sargasso Sea can be well represented by a classical Arrhenius function with an activation energy of 86.5 kJ mol-1, leading to a Q10 of 3.63. This indicates that for 2°C warming, we will have a 29% increase in ocean oxygen consumption rates, and for 3°C warming, a 47% increase, potentially leading to large-scale ocean hypoxia should a sufficient amount of organic matter be available to microbes. Here, we show that the same principles apply to a worldwide collation of tracer-based oxygen consumption rate data and that some 95% of ocean oxygen consumption is driven by temperature, not depth, and thus will have a strong climate dependence. The Arrhenius/Eyring equations are no simple panacea and they require a non-equilibrium steady state to exist. Where transient events are in progress, this stricture is not obeyed and we show one such possible example.This article is part of the themed issue 'Ocean ventilation and deoxygenation in a warming world'.
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Affiliation(s)
- Peter G Brewer
- Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USA
| | - Edward T Peltzer
- Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USA
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78
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Chen CR, Makhatadze GI. Molecular Determinants of Temperature Dependence of Protein Volume Change upon Unfolding. J Phys Chem B 2017; 121:8300-8310. [PMID: 28795561 DOI: 10.1021/acs.jpcb.7b05831] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Pressure is a well-known environmental stressor that can either stabilize or destabilize proteins. The volumetric change upon protein unfolding determines the effect of pressure on protein stability, where negative volume changes destabilized proteins at high pressures. High temperature often accompanies high pressure, for example, in the ocean depths near hydrothermal vents or near faults, so it is important to study the effect of temperature on the volumetric change upon unfolding. We previously detailed the magnitude and sign of the molecular determinants of volumetric change, allowing us to quantitatively predict the volumetric change upon protein unfolding. Here, we present a comprehensive analysis of the temperature dependence of the volumetric components of proteins, showing that hydration volume is the primary component that defines expansivities of the native and unfolded states and void volume only contributes slightly to the folded state expansivity.
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Affiliation(s)
- Calvin R Chen
- Department of Biological Sciences and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , 110 8th Street, Troy, New York 12180, United States
| | - George I Makhatadze
- Department of Biological Sciences and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , 110 8th Street, Troy, New York 12180, United States
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79
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León-Zayas R, Peoples L, Biddle JF, Podell S, Novotny M, Cameron J, Lasken RS, Bartlett DH. The metabolic potential of the single cell genomes obtained from the Challenger Deep, Mariana Trench within the candidate superphylum Parcubacteria (OD1). Environ Microbiol 2017; 19:2769-2784. [PMID: 28474498 DOI: 10.1111/1462-2920.13789] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 04/27/2017] [Accepted: 04/27/2017] [Indexed: 11/28/2022]
Abstract
Candidate phyla (CP) are broad phylogenetic clusters of organisms that lack cultured representatives. Included in this fraction is the candidate Parcubacteria superphylum. Specific characteristics that have been ascribed to the Parcubacteria include reduced genome size, limited metabolic potential and exclusive reliance on fermentation for energy acquisition. The study of new environmental niches, such as the marine versus terrestrial subsurface, often expands the understanding of the genetic potential of taxonomic groups. For this reason, we analyzed 12 Parcubacteria single amplified genomes (SAGs) from sediment samples collected within the Challenger Deep of the Mariana Trench, obtained during the Deepsea Challenge (DSC) Expedition. Many of these SAGs are closely related to environmental sequences obtained from deep-sea environments based on 16S rRNA gene similarity and BLAST matches to predicted proteins. DSC SAGs encode features not previously identified in Parcubacteria obtained from other habitats. These include adaptation to oxidative stress, polysaccharide modification and genes associated with respiratory nitrate reduction. The DSC SAGs are also distinguished by relative greater abundance of genes for nucleotide and amino acid biosynthesis, repair of alkylated DNA and the synthesis of mechanosensitive ion channels. These results present an expanded view of the Parcubacteria, among members residing in an ultra-deep hadal environment.
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Affiliation(s)
- Rosa León-Zayas
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, 92093, USA.,School of Marine Science and Policy, University of Delaware, Lewes, DE, 19958, USA
| | - Logan Peoples
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jennifer F Biddle
- School of Marine Science and Policy, University of Delaware, Lewes, DE, 19958, USA
| | - Sheila Podell
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, 92093, USA
| | - Mark Novotny
- Microbial and Environmental Genomics, J. Craig Venter Institute, San Diego, CA, 92121, USA
| | - James Cameron
- Earthship Productions, 3806 Cross Creek Rd. Suite D, Malibu, CA, 90265-4975, USA
| | - Roger S Lasken
- Microbial and Environmental Genomics, J. Craig Venter Institute, San Diego, CA, 92121, USA
| | - Douglas H Bartlett
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, 92093, USA
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80
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Huang Q, Rodgers JM, Hemley RJ, Ichiye T. Extreme biophysics: Enzymes under pressure. J Comput Chem 2017; 38:1174-1182. [PMID: 28101963 PMCID: PMC6334844 DOI: 10.1002/jcc.24737] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 12/05/2016] [Accepted: 01/03/2017] [Indexed: 01/16/2023]
Abstract
A critical question about piezophilic (pressure-loving) microbes is how their constituent molecules maintain function under high pressure. Here, factors are examined that may lead to the increased activity under pressure in dihydrofolate reductase from the piezophilic Moritella profunda compared to the homologous enzyme from the mesophilic Escherichia coli. Molecular dynamics simulations are performed at various temperatures and pressures to examine how pressure affects the flexibility of the enzymes from these two microbes, since both stability and flexibility are necessary for enzyme activity. The results suggest that collective motions on the 10-ns timescale are responsible for the flexibility necessary for "corresponding states" activity at the growth conditions of the parent organism. In addition, the results suggest that while the lower stability of many enzymes from deep-sea microbes may be an adaptation for greater flexibility at low temperatures, high pressure may enhance their adaptation to low temperatures. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Qi Huang
- Department of Chemistry, Georgetown University, Washington, DC, USA, 20057
| | - Jocelyn M. Rodgers
- Department of Chemistry, Georgetown University, Washington, DC, USA, 20057; Geophysical Laboratory, Carnegie Institution for Science, Washington, DC, USA, 20015
| | - Russell J. Hemley
- Department of Civil and Environmental Engineering, George Washington University, Washington, DC, USA, 20052
| | - Toshiko Ichiye
- Department of Chemistry, Georgetown University, Washington, DC, USA, 20057
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81
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Otero L, Pérez-Mateos M, López-Caballero M. Hyperbaric cold storage versus conventional refrigeration for extending the shelf-life of hake loins. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2017.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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82
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Mota MJ, Lopes RP, Koubaa M, Roohinejad S, Barba FJ, Delgadillo I, Saraiva JA. Fermentation at non-conventional conditions in food- and bio-sciences by the application of advanced processing technologies. Crit Rev Biotechnol 2017; 38:122-140. [PMID: 28423948 DOI: 10.1080/07388551.2017.1312272] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The interest in improving the yield and productivity values of relevant microbial fermentations is an increasingly important issue for the scientific community. Therefore, several strategies have been tested for the stimulation of microbial growth and manipulation of their metabolic behavior. One promising approach involves the performance of fermentative processes during non-conventional conditions, which includes high pressure (HP), electric fields (EF) and ultrasound (US). These advanced technologies are usually applied for microbial inactivation in the context of food processing. However, the approach described in this study focuses on the use of these technologies at sub-lethal levels, since the aim is microbial growth and fermentation under these stress conditions. During these sub-lethal conditions, microbial strains develop specific genetic, physiologic and metabolic stress responses, possibly leading to fermentation products and processes with novel characteristics. In some cases, these modifications can represent considerable improvements, such as increased yields, productivities and fermentation rates, lower accumulation of by-products and/or production of different compounds. Although several studies report the successful application of these technologies during the fermentation processes, information on this subject is still scarce and poorly understood. For that reason, the present review paper intends to assemble and discuss the main findings reported in the literature to date, and aims to stimulate interest and encourage further developments in this field.
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Affiliation(s)
- Maria J Mota
- a Chemistry Department, QOPNA , University of Aveiro, Campus Universitário de Santiago , Aveiro , Portugal
| | - Rita P Lopes
- a Chemistry Department, QOPNA , University of Aveiro, Campus Universitário de Santiago , Aveiro , Portugal
| | - Mohamed Koubaa
- b Sorbonne Universités , Université de Technologie de Compiègne, Laboratoire Transformations Intégrées de la Matière Renouvelable (UTC/ESCOM, EA 4297 TIMR), Centre de Recherche de Royallieu , Compiegne France
| | - Shahin Roohinejad
- c Department of Food Technology and Bioprocess Engineering , Max Rubner-Institut, Federal Research Institute of Nutrition and Food , Karlsruhe , Germany.,d Burn and Wound Healing Research Center, Division of Food and Nutrition , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Francisco J Barba
- e Nutrition and Food Science Area, Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine Department, Faculty of Pharmacy , Universitat de València , València , Spain
| | - Ivonne Delgadillo
- a Chemistry Department, QOPNA , University of Aveiro, Campus Universitário de Santiago , Aveiro , Portugal
| | - Jorge A Saraiva
- a Chemistry Department, QOPNA , University of Aveiro, Campus Universitário de Santiago , Aveiro , Portugal
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83
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Kusube M, Kyaw TS, Tanikawa K, Chastain RA, Hardy KM, Cameron J, Bartlett DH. Colwellia marinimaniae sp. nov., a hyperpiezophilic species isolated from an amphipod within the Challenger Deep, Mariana Trench. Int J Syst Evol Microbiol 2017; 67:824-831. [DOI: 10.1099/ijsem.0.001671] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Masataka Kusube
- Department of Material Science, National Institute of Technology, Wakayama College, 77 Noshima, Nada-cho, Gobo, Wakayama 644-0023, Japan
| | - Than S. Kyaw
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA
| | - Kumiko Tanikawa
- Department of Material Science, National Institute of Technology, Wakayama College, 77 Noshima, Nada-cho, Gobo, Wakayama 644-0023, Japan
| | - Roger A. Chastain
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA
| | - Kevin M. Hardy
- Global Ocean Dynamics. Global Ocean Design, 7955 Silverton Ave., Suite 1208, San Diego, CA 92126, USA
| | - James Cameron
- Avatar Alliance Foundation, 16255 Ventura Blvd. Suite 525, Encino, CA 91436, USA
| | - Douglas H. Bartlett
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA
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84
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Merkle W, Baer K, Haag NL, Zielonka S, Ortloff F, Graf F, Lemmer A. High-pressure anaerobic digestion up to 100 bar: influence of initial pressure on production kinetics and specific methane yields. ENVIRONMENTAL TECHNOLOGY 2017; 38:337-344. [PMID: 27215165 DOI: 10.1080/09593330.2016.1192691] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 05/17/2016] [Indexed: 06/05/2023]
Abstract
To ensure an efficient use of biogas produced by anaerobic digestion, in some cases it would be advisable to upgrade the biogenic gases and inject them into the transnational gas grids. To investigate biogas production under high-pressure conditions up to 100 bar, new pressure batch methane reactors were developed for preliminary lab-scale experiments with a mixture of grass and maize silage hydrolysate. During this investigation, the effects of different initial pressures (1, 50 and 100 bar) on pressure increase, gas production and the specific methane yield using nitrogen as inert gas were determined. Based on the experimental findings increasing initial pressures alter neither significantly, further pressure increases nor pressure increase rates. All supplied organic acids were degraded and no measurable inhibition of the microorganisms was observed. The results show that methane reactors can be operated at operating pressures up to 100 bar without any negative effects on methane production.
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Affiliation(s)
- Wolfgang Merkle
- a State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim , Stuttgart , Germany
| | - Katharina Baer
- b DVGW - Research Centre at the Engler-Bunte-Institute, Karlsruhe Institute of Technology (KIT) , Karlsruhe , Germany
| | - Nicola Leonard Haag
- a State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim , Stuttgart , Germany
| | - Simon Zielonka
- a State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim , Stuttgart , Germany
| | - Felix Ortloff
- b DVGW - Research Centre at the Engler-Bunte-Institute, Karlsruhe Institute of Technology (KIT) , Karlsruhe , Germany
| | - Frank Graf
- b DVGW - Research Centre at the Engler-Bunte-Institute, Karlsruhe Institute of Technology (KIT) , Karlsruhe , Germany
| | - Andreas Lemmer
- a State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim , Stuttgart , Germany
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85
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Li Z, Li X, Xiao X, Xu J. An Integrative Genomic Island Affects the Adaptations of the Piezophilic Hyperthermophilic Archaeon Pyrococcus yayanosii to High Temperature and High Hydrostatic Pressure. Front Microbiol 2016; 7:1927. [PMID: 27965650 PMCID: PMC5126054 DOI: 10.3389/fmicb.2016.01927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/16/2016] [Indexed: 12/15/2022] Open
Abstract
Deep-sea hydrothermal vent environments are characterized by high hydrostatic pressure and sharp temperature and chemical gradients. Horizontal gene transfer is thought to play an important role in the microbial adaptation to such an extreme environment. In this study, a 21.4-kb DNA fragment was identified as a genomic island, designated PYG1, in the genomic sequence of the piezophilic hyperthermophile Pyrococcus yayanosii. According to the sequence alignment and functional annotation, the genes in PYG1 could tentatively be divided into five modules, with functions related to mobility, DNA repair, metabolic processes and the toxin-antitoxin system. Integrase can mediate the site-specific integration and excision of PYG1 in the chromosome of P. yayanosii A1. Gene replacement of PYG1 with a SimR cassette was successful. The growth of the mutant strain ΔPYG1 was compared with its parent strain P. yayanosii A2 under various stress conditions, including different pH, salinity, temperature, and hydrostatic pressure. The ΔPYG1 mutant strain showed reduced growth when grown at 100°C, while the biomass of ΔPYG1 increased significantly when cultured at 80 MPa. Differential expression of the genes in module III of PYG1 was observed under different temperature and pressure conditions. This study demonstrates the first example of an archaeal integrative genomic island that could affect the adaptation of the hyperthermophilic piezophile P. yayanosii to high temperature and high hydrostatic pressure.
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Affiliation(s)
- Zhen Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China; Institute of Oceanology, Shanghai Jiao Tong UniversityShanghai, China
| | - Xuegong Li
- Institute of Oceanology, Shanghai Jiao Tong UniversityShanghai, China; Deep-Sea Cellular Microbiology, Department of Deep-Sea Science, Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of SciencesSanya, China
| | - Xiang Xiao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China; Institute of Oceanology, Shanghai Jiao Tong UniversityShanghai, China
| | - Jun Xu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China; Institute of Oceanology, Shanghai Jiao Tong UniversityShanghai, China
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86
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Neto R, Mota MJ, Lopes RP, Delgadillo I, Saraiva JA. Growth and metabolism of Oenococcus oeni for malolactic fermentation under pressure. Lett Appl Microbiol 2016; 63:426-433. [PMID: 27581841 DOI: 10.1111/lam.12664] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 06/02/2016] [Accepted: 06/28/2016] [Indexed: 12/15/2022]
Abstract
Malolactic fermentation is a biological deacidification process of wine, characterized by the transformation of l-malic acid to l-lactic acid and CO2 . Oenococcus oeni is able to perform malolactic fermentation and to survive under wine harsh conditions, representing great interest for wine industry. The aim of this work was to evaluate the effect of high pressure on the metabolism of O. oeni growing in culture media, regarding malolactic fermentation, sugars metabolism and bacterial growth. A pressure stress of 50 MPa during 8 h did not result in significant modifications in bacterial metabolism. In contrast, a stress of 100 MPa during 8 h resulted in lower amounts of l-lactic acid, while higher amounts of d-lactic acid were also registered, indicating changes in bacterial metabolism. A pressure stress of 0·5 MPa during 300 h resulted in complete inactivation of O. oeni, but malolactic fermentation was still observed at some extent, showing that malolactic enzyme was not completely inactivated at these conditions. It was concluded that high pressure causes modification of O. oeni metabolism, and possibly in enzyme activities. SIGNIFICANCE AND IMPACT OF THE STUDY This study demonstrates that high pressure affects the viability and metabolism of Oenococcus oeni on a culture medium, depending on the pressure intensity and holding time applied. These effects were particularly noteworthy on malolactic fermentation. After high pressure (HP)-stress of 100 MPa for 8 h, modifications in the activity of malolactic enzyme were detected, possibly due to a change in specificity. After a HP-stress of 300 MPa for 0·5 h, malolactic enzyme showed some residual activity, although O. oeni was completely inactivated. This study provides relevant information about the impact of high pressure on malolactic fermentation, opening interesting possibilities to the improvement of biocatalytic processes.
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Affiliation(s)
- R Neto
- QOPNA, Chemistry Department, University of Aveiro, Aveiro, Portugal
| | - M J Mota
- QOPNA, Chemistry Department, University of Aveiro, Aveiro, Portugal
| | - R P Lopes
- QOPNA, Chemistry Department, University of Aveiro, Aveiro, Portugal
| | - I Delgadillo
- QOPNA, Chemistry Department, University of Aveiro, Aveiro, Portugal
| | - J A Saraiva
- QOPNA, Chemistry Department, University of Aveiro, Aveiro, Portugal
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87
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Schummel PH, Haag A, Kremer W, Kalbitzer HR, Winter R. Cosolvent and Crowding Effects on the Temperature and Pressure Dependent Conformational Dynamics and Stability of Globular Actin. J Phys Chem B 2016; 120:6575-86. [DOI: 10.1021/acs.jpcb.6b04738] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Paul Hendrik Schummel
- Physical
Chemistry I − Biophysical Chemistry, Faculty of Chemistry and
Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 4a, D-44227 Dortmund, Germany
| | - Andreas Haag
- Institute
of Biophysics and Physical Biochemistry, Centre of Magnetic Resonance
in Chemistry and Biomedicine (CMRCB), University of Regensburg, Universitätsstrasse
31, D-93047 Regensburg, Germany
| | - Werner Kremer
- Institute
of Biophysics and Physical Biochemistry, Centre of Magnetic Resonance
in Chemistry and Biomedicine (CMRCB), University of Regensburg, Universitätsstrasse
31, D-93047 Regensburg, Germany
| | - Hans Robert Kalbitzer
- Institute
of Biophysics and Physical Biochemistry, Centre of Magnetic Resonance
in Chemistry and Biomedicine (CMRCB), University of Regensburg, Universitätsstrasse
31, D-93047 Regensburg, Germany
| | - Roland Winter
- Physical
Chemistry I − Biophysical Chemistry, Faculty of Chemistry and
Chemical Biology, TU Dortmund University, Otto-Hahn-Strasse 4a, D-44227 Dortmund, Germany
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88
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Imoto S, Kibies P, Rosin C, Winter R, Kast SM, Marx D. Toward Extreme Biophysics: Deciphering the Infrared Response of Biomolecular Solutions at High Pressures. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602757] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sho Imoto
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
| | - Patrick Kibies
- Physikalische Chemie III; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Christopher Rosin
- Physikalische Chemie I; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Roland Winter
- Physikalische Chemie I; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Stefan M. Kast
- Physikalische Chemie III; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
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Imoto S, Kibies P, Rosin C, Winter R, Kast SM, Marx D. Toward Extreme Biophysics: Deciphering the Infrared Response of Biomolecular Solutions at High Pressures. Angew Chem Int Ed Engl 2016; 55:9534-8. [DOI: 10.1002/anie.201602757] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 05/18/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Sho Imoto
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
| | - Patrick Kibies
- Physikalische Chemie III; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Christopher Rosin
- Physikalische Chemie I; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Roland Winter
- Physikalische Chemie I; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Stefan M. Kast
- Physikalische Chemie III; Technische Universität Dortmund; 44227 Dortmund Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie; Ruhr-Universität Bochum; 44780 Bochum Germany
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90
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Michoud G, Jebbar M. High hydrostatic pressure adaptive strategies in an obligate piezophile Pyrococcus yayanosii. Sci Rep 2016; 6:27289. [PMID: 27250364 PMCID: PMC4890121 DOI: 10.1038/srep27289] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 05/14/2016] [Indexed: 02/06/2023] Open
Abstract
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.
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Affiliation(s)
- Grégoire Michoud
- Univ Brest, CNRS, Ifremer, UMR 6197-Laboratoire de Microbiologie des Environnements Extrêmes (LM2E), Institut Universitaire Européen de la Mer (IUEM), rue Dumont d'Urville, 29 280 Plouzané, France
| | - Mohamed Jebbar
- Univ Brest, CNRS, Ifremer, UMR 6197-Laboratoire de Microbiologie des Environnements Extrêmes (LM2E), Institut Universitaire Européen de la Mer (IUEM), rue Dumont d'Urville, 29 280 Plouzané, France
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91
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Scoma A, Boon N. Osmotic Stress Confers Enhanced Cell Integrity to Hydrostatic Pressure but Impairs Growth in Alcanivorax borkumensis SK2. Front Microbiol 2016; 7:729. [PMID: 27242746 PMCID: PMC4870253 DOI: 10.3389/fmicb.2016.00729] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 05/02/2016] [Indexed: 01/13/2023] Open
Abstract
Alcanivorax is a hydrocarbonoclastic genus dominating oil spills worldwide. While its presence has been detected in oil-polluted seawaters, marine sediment and salt marshes under ambient pressure, its presence in deep-sea oil-contaminated environments is negligible. Recent laboratory studies highlighted the piezosensitive nature of some Alcanivorax species, whose growth yields are highly impacted by mild hydrostatic pressures (HPs). In the present study, osmotic stress was used as a tool to increase HP resistance in the type strain Alcanivorax borkumensis SK2. Control cultures grown under standard conditions of salinity and osmotic pressure with respect to seawater (35.6 ppt or 1136 mOsm kg-1, respectively) were compared with cultures subjected to hypo- and hyperosmosis (330 and 1720 mOsm kg-1, or 18 and 62 ppt in salinity, equivalent to brackish and brine waters, respectively), under atmospheric or increased HP (0.1 and 10 MPa). Osmotic stress had a remarkably positive impact on cell metabolic activity in terms of CO2 production (thus, oil bioremediation) and O2 respiration under hyperosmosis, as acclimation to high salinity enhanced cell activity under 10 MPa by a factor of 10. Both osmotic shocks significantly enhanced cell protection by reducing membrane damage under HP, with cell integrities close to 100% under hyposmosis. The latter was likely due to intracellular water-reclamation as no trace of the piezolyte ectoine was found, contrary to hyperosmosis. Notably, ectoine production was equivalent at 0.1 MPa in hyperosmosis-acclimated cells and at 10 MPa under isosmotic conditions. While stimulating cell metabolism and enhancing cell integrity, osmotic stress had always a negative impact on culture growth and performance. No net growth was observed during 4-days incubation tests, and CO2:O2 ratios and pH values indicated that culture performance in terms of hydrocarbon degradation was lowered by the effects of osmotic stress alone or combined with increased HP. These findings confirm the piezosensitive nature of A. borkumensis, which lacks proper resistance mechanisms to improve its metabolic efficiency under increased HP, thus explaining its limited role in oil-polluted deep-sea environments.
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Affiliation(s)
- Alberto Scoma
- Center for Microbial Ecology and Technology, Department of Biochemical and Microbial Technology, University of Ghent Ghent, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology, Department of Biochemical and Microbial Technology, University of Ghent Ghent, Belgium
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92
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Hayashi M, Nishiyama M, Kazayama Y, Toyota T, Harada Y, Takiguchi K. Reversible Morphological Control of Tubulin-Encapsulating Giant Liposomes by Hydrostatic Pressure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3794-3802. [PMID: 27023063 DOI: 10.1021/acs.langmuir.6b00799] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Liposomes encapsulating cytoskeletons have drawn much recent attention to develop an artificial cell-like chemical-machinery; however, as far as we know, there has been no report showing isothermally reversible morphological changes of liposomes containing cytoskeletons because the sets of various regulatory factors, that is, their interacting proteins, are required to control the state of every reaction system of cytoskeletons. Here we focused on hydrostatic pressure to control the polymerization state of microtubules (MTs) within cell-sized giant liposomes (diameters ∼10 μm). MT is the cytoskeleton formed by the polymerization of tubulin, and cytoskeletal systems consisting of MTs are very dynamic and play many important roles in living cells, such as the morphogenesis of nerve cells and formation of the spindle apparatus during mitosis. Using real-time imaging with a high-pressure microscope, we examined the effects of hydrostatic pressure on the morphology of tubulin-encapsulating giant liposomes. At ambient pressure (0.1 MPa), many liposomes formed protrusions due to tubulin polymerization within them. When high pressure (60 MPa) was applied, the protrusions shrank within several tens of seconds. This process was repeatedly inducible (around three times), and after the pressure was released, the protrusions regenerated within several minutes. These deformation rates of the liposomes are close to the velocities of migrating or shape-changing living cells rather than the shortening and elongation rates of the single MTs, which have been previously measured. These results demonstrate that the elongation and shortening of protrusions of giant liposomes is repeatedly controllable by regulating the polymerization state of MTs within them by applying and releasing hydrostatic pressure.
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Affiliation(s)
- Masahito Hayashi
- Division of Biological Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan
| | | | | | | | | | - Kingo Takiguchi
- Division of Biological Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan
- Structural Biology Research Center, Nagoya University , Nagoya 464-8601, Japan
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93
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Hölzl C, Kibies P, Imoto S, Frach R, Suladze S, Winter R, Marx D, Horinek D, Kast SM. Design principles for high–pressure force fields: Aqueous TMAO solutions from ambient to kilobar pressures. J Chem Phys 2016; 144:144104. [DOI: 10.1063/1.4944991] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Christoph Hölzl
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Patrick Kibies
- Physikalische Chemie III, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Sho Imoto
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Roland Frach
- Physikalische Chemie III, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Saba Suladze
- Physikalische Chemie I, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Roland Winter
- Physikalische Chemie I, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Dominik Marx
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Dominik Horinek
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040 Regensburg, Germany
| | - Stefan M. Kast
- Physikalische Chemie III, Technische Universität Dortmund, 44227 Dortmund, Germany
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94
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High pressure assisted thermal processing of pumpkin purée: Effect on microbial counts, color, bioactive compounds and polyphenoloxidase enzyme. FOOD AND BIOPRODUCTS PROCESSING 2016. [DOI: 10.1016/j.fbp.2016.01.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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95
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Scoma A, Barbato M, Hernandez-Sanabria E, Mapelli F, Daffonchio D, Borin S, Boon N. Microbial oil-degradation under mild hydrostatic pressure (10 MPa): which pathways are impacted in piezosensitive hydrocarbonoclastic bacteria? Sci Rep 2016; 6:23526. [PMID: 27020120 PMCID: PMC4810429 DOI: 10.1038/srep23526] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 03/08/2016] [Indexed: 01/19/2023] Open
Abstract
Oil spills represent an overwhelming carbon input to the marine environment that immediately impacts the sea surface ecosystem. Microbial communities degrading the oil fraction that eventually sinks to the seafloor must also deal with hydrostatic pressure, which linearly increases with depth. Piezosensitive hydrocarbonoclastic bacteria are ideal candidates to elucidate impaired pathways following oil spills at low depth. In the present paper, we tested two strains of the ubiquitous Alcanivorax genus, namely A. jadensis KS_339 and A. dieselolei KS_293, which is known to rapidly grow after oil spills. Strains were subjected to atmospheric and mild pressure (0.1, 5 and 10 MPa, corresponding to a depth of 0, 500 and 1000 m, respectively) providing n-dodecane as sole carbon source. Pressures equal to 5 and 10 MPa significantly lowered growth yields of both strains. However, in strain KS_293 grown at 10 MPa CO2 production per cell was not affected, cell integrity was preserved and PO4(3-) uptake increased. Analysis of its transcriptome revealed that 95% of its genes were downregulated. Increased transcription involved protein synthesis, energy generation and respiration pathways. Interplay between these factors may play a key role in shaping the structure of microbial communities developed after oil spills at low depth and limit their bioremediation potential.
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Affiliation(s)
- Alberto Scoma
- Laboratory of Microbial Ecology and Technology (LabMET), University of Gent, Coupure Links 653, B 9000 Gent, Belgium
| | - Marta Barbato
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milano, Via Celoria 2, 20133, Milano, Italy
| | - Emma Hernandez-Sanabria
- Laboratory of Microbial Ecology and Technology (LabMET), University of Gent, Coupure Links 653, B 9000 Gent, Belgium
| | - Francesca Mapelli
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milano, Via Celoria 2, 20133, Milano, Italy
| | - Daniele Daffonchio
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences and Engineering Division, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milano, Via Celoria 2, 20133, Milano, Italy
| | - Sara Borin
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milano, Via Celoria 2, 20133, Milano, Italy
| | - Nico Boon
- Laboratory of Microbial Ecology and Technology (LabMET), University of Gent, Coupure Links 653, B 9000 Gent, Belgium
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96
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Itävaara M, Salavirta H, Marjamaa K, Ruskeeniemi T. Geomicrobiology and Metagenomics of Terrestrial Deep Subsurface Microbiomes. ADVANCES IN APPLIED MICROBIOLOGY 2016; 94:1-77. [PMID: 26917241 DOI: 10.1016/bs.aambs.2015.12.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fractures in the deep subsurface of Earth's crust are inhabited by diverse microbial communities that participate in biogeochemical cycles of the Earth. Life on Earth, which arose c. 3.5-4.0 billion years ago, reaches down at least 5 km in the crust. Deep mines, caves, and boreholes have provided scientists with opportunities to sample deep subsurface microbiomes and to obtain information on the species diversity and functions. A wide variety of bacteria, archaea, eukaryotes, and viruses are now known to reside in the crust, but their functions are still largely unknown. The crust at different depths has varying geological composition and hosts endemic microbiomes accordingly. The diversity is driven by geological formations and gases evolving from deeper depths. Cooperation among different species is still mostly unexplored, but viruses are known to restrict density of bacterial and archaeal populations. Due to the complex growth requirements of the deep subsurface microbiomes, the new knowledge about their diversity and functions is mostly obtained by molecular methods, eg, meta'omics'. Geomicrobiology is a multidisciplinary research area combining disciplines from geology, mineralogy, geochemistry, and microbiology. Geomicrobiology is concerned with the interaction of microorganisms and geological processes. At the surface of mineralogical or rock surfaces, geomicrobial processes occur mainly under aerobic conditions. In the deep subsurface, however, the environmental conditions are reducing and anaerobic. The present chapter describes the world of microbiomes in deep terrestrial geological environments as well as metagenomic and metatranscriptomic methods suitable for studies of these enigmatic communities.
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Affiliation(s)
- M Itävaara
- VTT Technical Research Centre of Finland Ltd, Espoo, Finland
| | - H Salavirta
- VTT Technical Research Centre of Finland Ltd, Espoo, Finland
| | - K Marjamaa
- VTT Technical Research Centre of Finland Ltd, Espoo, Finland
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97
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Pressure adaptation of 3-isopropylmalate dehydrogenase from an extremely piezophilic bacterium is attributed to a single amino acid substitution. Extremophiles 2016; 20:177-86. [PMID: 26847201 DOI: 10.1007/s00792-016-0811-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 01/15/2016] [Indexed: 10/22/2022]
Abstract
3-Isopropylmalate dehydrogenase (IPMDH) from the extreme piezophile Shewanella benthica (SbIPMDH) is more pressure-tolerant than that from the atmospheric pressure-adapted Shewanella oneidensis (SoIPMDH). To understand the molecular mechanisms of this pressure tolerance, we analyzed mutated enzymes. The results indicate that only a single mutation at position 266, corresponding to Ala (SbIPMDH) and Ser (SoIPMDH), essentially affects activity under higher-pressure conditions. Structural analyses of SoIPMDH suggests that penetration of three water molecules into the cleft around Ser266 under high-pressure conditions could reduce the activity of the wild-type enzyme; however, no water molecule is observed in the Ala266 mutant.
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98
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Hyperbaric storage at room temperature: Effect of pressure level and storage time on the natural microbiota of strawberry juice. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2015.10.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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99
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Ragon M, Nguyen Thi Minh H, Guyot S, Loison P, Burgaud G, Dupont S, Beney L, Gervais P, Perrier-Cornet JM. Innovative High Gas Pressure Microscopy Chamber Designed for Biological Cell Observation. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2016; 22:63-70. [PMID: 26810277 DOI: 10.1017/s1431927615015639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An original high-pressure microscopy chamber has been designed for real-time visualization of biological cell growth during high isostatic (gas or liquid) pressure treatments up to 200 MPa. This new system is highly flexible allowing cell visualization under a wide range of pressure levels as the thickness and the material of the observation window can be easily adapted. Moreover, the design of the observation area allows different microscope objectives to be used as close as possible to the observation window. This chamber can also be temperature controlled. In this study, the resistance and optical properties of this new high-pressure chamber have been tested and characterized. The use of this new chamber was illustrated by a real-time study of the growth of two different yeast strains - Saccharomyces cerevisiae and Candida viswanathii - under high isostatic gas pressure (30 or 20 MPa, respectively). Using image analysis software, we determined the evolution of the area of colonies as a function of time, and thus calculated colony expansion rates.
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Affiliation(s)
- Mélanie Ragon
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Hue Nguyen Thi Minh
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Stéphane Guyot
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Pauline Loison
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Gaëtan Burgaud
- 2Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (EA3882),IFR 148,Université Européenne de Bretagne/Université de Brest/ESMISAB,Technopole Brest-Iroise,29280 Plouzané,France
| | - Sébastien Dupont
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Laurent Beney
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Patrick Gervais
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
| | - Jean-Marie Perrier-Cornet
- 1UMR A 02.102 Procédés Alimentaires et Microbiologiques,Université Bourgogne Franche-Comté/AgroSup Dijon,1 Esplanade Erasme,21000 Dijon,France
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100
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