1
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Peters J, Oliva R, Caliò A, Oger P, Winter R. Effects of Crowding and Cosolutes on Biomolecular Function at Extreme Environmental Conditions. Chem Rev 2023; 123:13441-13488. [PMID: 37943516 DOI: 10.1021/acs.chemrev.3c00432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
The extent of the effect of cellular crowding and cosolutes on the functioning of proteins and cells is manifold and includes the stabilization of the biomolecular systems, the excluded volume effect, and the modulation of molecular dynamics. Simultaneously, it is becoming increasingly clear how important it is to take the environment into account if we are to shed light on biological function under various external conditions. Many biosystems thrive under extreme conditions, including the deep sea and subseafloor crust, and can take advantage of some of the effects of crowding. These relationships have been studied in recent years using various biophysical techniques, including neutron and X-ray scattering, calorimetry, FTIR, UV-vis and fluorescence spectroscopies. Combining knowledge of the structure and conformational dynamics of biomolecules under extreme conditions, such as temperature, high hydrostatic pressure, and high salinity, we highlight the importance of considering all results in the context of the environment. Here we discuss crowding and cosolute effects on proteins, nucleic acids, membranes, and live cells and explain how it is possible to experimentally separate crowding-induced effects from other influences. Such findings will contribute to a better understanding of the homeoviscous adaptation of organisms and the limits of life in general.
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Affiliation(s)
- Judith Peters
- Univ. Grenoble Alpes, CNRS, LiPhy, 140 rue de la physique, 38400 St Martin d'Hères, France
- Institut Laue Langevin, 71 avenue des Martyrs, 38000 Grenoble, France
- Institut Universitaire de France, 75005 Paris, France
| | - Rosario Oliva
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126 Naples, Italy
| | - Antonino Caliò
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Philippe Oger
- INSA Lyon, Universite Claude Bernard Lyon1, CNRS, UMR5240, 69621 Villeurbanne, France
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, Dortmund, Otto-Hahn-Str. 4a, D-44227 Dortmund, Germany
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2
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Knop JM, Mukherjee S, Jaworek MW, Kriegler S, Manisegaran M, Fetahaj Z, Ostermeier L, Oliva R, Gault S, Cockell CS, Winter R. Life in Multi-Extreme Environments: Brines, Osmotic and Hydrostatic Pressure─A Physicochemical View. Chem Rev 2023; 123:73-104. [PMID: 36260784 DOI: 10.1021/acs.chemrev.2c00491] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Elucidating the details of the formation, stability, interactions, and reactivity of biomolecular systems under extreme environmental conditions, including high salt concentrations in brines and high osmotic and high hydrostatic pressures, is of fundamental biological, astrobiological, and biotechnological importance. Bacteria and archaea are able to survive in the deep ocean or subsurface of Earth, where pressures of up to 1 kbar are reached. The deep subsurface of Mars may host high concentrations of ions in brines, such as perchlorates, but we know little about how these conditions and the resulting osmotic stress conditions would affect the habitability of such environments for cellular life. We discuss the combined effects of osmotic (salts, organic cosolvents) and hydrostatic pressures on the structure, stability, and reactivity of biomolecular systems, including membranes, proteins, and nucleic acids. To this end, a variety of biophysical techniques have been applied, including calorimetry, UV/vis, FTIR and fluorescence spectroscopy, and neutron and X-ray scattering, in conjunction with high pressure techniques. Knowledge of these effects is essential to our understanding of life exposed to such harsh conditions, and of the physical limits of life in general. Finally, we discuss strategies that not only help us understand the adaptive mechanisms of organisms that thrive in such harsh geological settings but could also have important ramifications in biotechnological and pharmaceutical applications.
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Affiliation(s)
- Jim-Marcel Knop
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Sanjib Mukherjee
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Michel W Jaworek
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Simon Kriegler
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Magiliny Manisegaran
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Zamira Fetahaj
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Lena Ostermeier
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
| | - Rosario Oliva
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany.,Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126Naples, Italy
| | - Stewart Gault
- UK Centre for Astrobiology, SUPA School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, EH9 3FDEdinburgh, United Kingdom
| | - Charles S Cockell
- UK Centre for Astrobiology, SUPA School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, EH9 3FDEdinburgh, United Kingdom
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Biophysical Chemistry, TU Dortmund University, D-44221Dortmund, Germany
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3
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Kusova AM, Sitnitsky AE, Uversky VN, Zuev YF. Effect of Protein–Protein Interactions on Translational Diffusion of Spheroidal Proteins. Int J Mol Sci 2022; 23:ijms23169240. [PMID: 36012504 PMCID: PMC9409276 DOI: 10.3390/ijms23169240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/08/2022] [Accepted: 08/14/2022] [Indexed: 11/21/2022] Open
Abstract
One of the commonly accepted approaches to estimate protein–protein interactions (PPI) in aqueous solutions is the analysis of their translational diffusion. The present review article observes a phenomenological approach to analyze PPI effects via concentration dependencies of self- and collective translational diffusion coefficient for several spheroidal proteins derived from the pulsed field gradient NMR (PFG NMR) and dynamic light scattering (DLS), respectively. These proteins are rigid globular α-chymotrypsin (ChTr) and human serum albumin (HSA), and partly disordered α-casein (α-CN) and β-lactoglobulin (β-Lg). The PPI analysis enabled us to reveal the dominance of intermolecular repulsion at low ionic strength of solution (0.003–0.01 M) for all studied proteins. The increase in the ionic strength to 0.1–1.0 M leads to the screening of protein charges, resulting in the decrease of the protein electrostatic potential. The increase of the van der Waals potential for ChTr and α-CN characterizes their propensity towards unstable weak attractive interactions. The decrease of van der Waals interactions for β-Lg is probably associated with the formation of stable oligomers by this protein. The PPI, estimated with the help of interaction potential and idealized spherical molecular geometry, are in good agreement with experimental data.
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Affiliation(s)
- Aleksandra M. Kusova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
| | - Aleksandr E. Sitnitsky
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
| | - Vladimir N. Uversky
- Department of Molecular Medicine and Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, 12901 Bruce B. Downs Blvd., MDC07, Tampa, FL 33612, USA
| | - Yuriy F. Zuev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str., 2/31, 420111 Kazan, Russia
- Correspondence: ; Tel.: +7-(843)-2319036
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Pham VN, Radajewski D, Rodríguez-Ruiz I, Teychene S. Microfluidics: A Novel Approach for Dehydration Protein Droplets. BIOSENSORS 2021; 11:bios11110460. [PMID: 34821675 PMCID: PMC8615364 DOI: 10.3390/bios11110460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022]
Abstract
The equation of state of colloids plays an important role in the modelling and comprehension of industrial processes, defining the working conditions of processes such as drying, filtration, and mixing. The determination of the equation is based on the solvent equilibration, by dialysis, between the colloidal suspension and a reservoir with a known osmotic pressure. In this paper, we propose a novel microfluidic approach to determine the equation of state of a lysozyme solution. Monodispersed droplets of lysozyme were generated in the bulk of a continuous 1-decanol phase using a flow-focusing microfluidic geometry. In this multiphasic system and in the working operation conditions, the droplets can be considered to act as a permeable membrane system. A water mass transfer flow occurs by molecule continuous diffusion in the surrounding 1-decanol phase until a thermodynamic equilibrium is reached in a few seconds to minutes, in contrast with the standard osmotic pressure measurements. By changing the water saturation of the continuous phase, the equation of state of lysozyme in solution was determined through the relation of the osmotic pressure between protein molecules and the volume fraction of protein inside the droplets. The obtained equation shows good agreement with other standard approaches reported in the literature.
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Affiliation(s)
- Van Nhat Pham
- Graduate University of Science and Technology (GUST), Vietnam Academy of Science and Technology, Hanoi 10072, Vietnam;
- Department of Advanced Materials Science and Nanotechnology, Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi (USTH), Hanoi 10072, Vietnam
| | - Dimitri Radajewski
- Laboratoire de Génie Chimique, UMR 5503, 4 allée Emile Monso, 31432 Toulouse, France; (D.R.); (I.R.-R.)
| | - Isaac Rodríguez-Ruiz
- Laboratoire de Génie Chimique, UMR 5503, 4 allée Emile Monso, 31432 Toulouse, France; (D.R.); (I.R.-R.)
| | - Sebastien Teychene
- Laboratoire de Génie Chimique, UMR 5503, 4 allée Emile Monso, 31432 Toulouse, France; (D.R.); (I.R.-R.)
- Correspondence:
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5
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Golub M, Martinez N, Michoud G, Ollivier J, Jebbar M, Oger P, Peters J. The Effect of Crowding on Protein Stability, Rigidity, and High Pressure Sensitivity in Whole Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10419-10425. [PMID: 30086639 DOI: 10.1021/acs.langmuir.8b01240] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In live cells, high concentrations up to 300-400 mg/mL, as in Eschericia coli (Ellis, R. J. Curr. Opin. Struct. Biol. 2001, 11, 114) are achieved which have effects on their proper functioning. However, in many experiments only individual parts of the cells as proteins or membranes are studied in order to get insight into these specific components and to avoid the high complexity of whole cells, neglecting by the way the influence of crowding. In the present study, we investigated cells of the order of Thermococcales, which are known to live under extreme conditions, in their intact form and after cell lysis to extract the effect of crowding on the molecular dynamics of the proteome and of water molecules. We found that some parameters characterizing the dynamics within the cells seem to be intrinsic to the cell type, as flexibility typical for the proteome, others are more specific to the cellular environment, as bulk water's residence time and some fractions of particles participating to the different motions, which make the lysed cells' dynamics similar to the one of another Thermococcale adapted to live under high hydrostatic pressure. In contrast to studies on the impact of crowding on pure proteins we show here that the release of crowding constraints on proteins leads to an increase in the rigidity and a decrease in the high pressure sensitivity. In a way similar to high pressure adaptation in piezophiles, the hydration water layer is decreased for the lysed cells, demonstrating a first link between protein adaptation and the impact of crowding or osmolytes on proteins.
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Affiliation(s)
- Maksym Golub
- Université Grenoble Alpes, CNRS and CEA, IBS , Grenoble , F-38000 , France
- Institut Laue Langevin , Grenoble Cedex 9 , F-38042 , France
| | - Nicolas Martinez
- Université Grenoble Alpes, CNRS and CEA, IBS , Grenoble , F-38000 , France
- Institut Laue Langevin , Grenoble Cedex 9 , F-38042 , France
| | - Grégoire Michoud
- Université Brest, CNRS, Ifremer, LM2E, IUEM , Plouzané , 29280 , France
| | | | - Mohamed Jebbar
- Université Brest, CNRS, Ifremer, LM2E, IUEM , Plouzané , 29280 , France
| | - Philippe Oger
- Université Lyon, INSA Lyon CNRS UMR 5240 , Villeurbanne cedex , F-69621 , France
| | - Judith Peters
- Institut Laue Langevin , Grenoble Cedex 9 , F-38042 , France
- University of Grenoble Alpes, CNRS, LIPhy , Grenoble , 38000 , France
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6
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Al-Ayoubi SR, Schummel PH, Golub M, Peters J, Winter R. Influence of cosolvents, self-crowding, temperature and pressure on the sub-nanosecond dynamics and folding stability of lysozyme. Phys Chem Chem Phys 2018; 19:14230-14237. [PMID: 28447688 DOI: 10.1039/c7cp00705a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We studied the effects of temperature and hydrostatic pressure on the dynamical properties and folding stability of highly concentrated lysozyme solutions in the absence and presence of the osmolytes trimethylamine-N-oxide (TMAO) and urea. Elastic incoherent neutron scattering (EINS) was applied to determine the mean-squared displacement (MSD) of the protein's hydrogen atoms to yield insights into the effects of these cosolvents on the averaged sub-nanosecond dynamics in the pressure range from ambient up to 4000 bar. To evaluate the additional effect of self-crowding, two protein concentrations (80 and 160 mg mL-1) were used. We observed a distinct effect of TMAO on the internal hydrogen dynamics, namely a reduced mobility. Urea, on the other hand, revealed no marked effect and consequently, no counteracting effect in an urea-TMAO mixture was observed. Different from the less concentrated protein solution, no significant effect of pressure on the MSD was observed for 160 mg mL-1 lysozyme. The EINS experiments were complemented by Fourier-transform infrared (FTIR) spectroscopy measurements, which led to additional insights into the folding stability of lysozyme under the various environmental conditions. We observed a stabilization of the protein in the presence of the compatible osmolyte TMAO and a destabilization in the presence of urea against temperature and pressure for both protein concentrations. Additionally, we noticed a slight destabilizing effect upon self-crowding at very high protein concentration (160 mg mL-1), which is attributable to transient destabilizing intermolecular interactions. Furthermore, a pressure-temperature diagram could be obtained for lysozyme at these high protein concentrations that mimics densely packed intracellular conditions.
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Affiliation(s)
- S R Al-Ayoubi
- Physical Chemistry I - Biophysical Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 4a, 44227, Dortmund, Germany.
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7
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Marasini C, Foderà V, Vestergaard B. Sucrose modulates insulin amyloid-like fibril formation: effect on the aggregation mechanism and fibril morphology. RSC Adv 2017. [DOI: 10.1039/c6ra25872g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sucrose modifies the human insulin fibrillation pathways, affecting the fibril morphology.
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Affiliation(s)
- Carlotta Marasini
- Department of Drug Design and Pharmacology
- University of Copenhagen
- 2100 Copenhagen
- Denmark
| | - Vito Foderà
- Section for Biologics
- Department of Pharmacy
- University of Copenhagen
- 2100 Copenhagen
- Denmark
| | - Bente Vestergaard
- Department of Drug Design and Pharmacology
- University of Copenhagen
- 2100 Copenhagen
- Denmark
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8
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Wieland DCF, Garamus VM, Zander T, Krywka C, Wang M, Dedinaite A, Claesson PM, Willumeit-Römer R. Studying solutions at high shear rates: a dedicated microfluidics setup. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:480-486. [PMID: 26917136 DOI: 10.1107/s1600577515024856] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 12/28/2015] [Indexed: 06/05/2023]
Abstract
The development of a dedicated small-angle X-ray scattering setup for the investigation of complex fluids at different controlled shear conditions is reported. The setup utilizes a microfluidics chip with a narrowing channel. As a consequence, a shear gradient is generated within the channel and the effect of shear rate on structure and interactions is mapped spatially. In a first experiment small-angle X-ray scattering is utilized to investigate highly concentrated protein solutions up to a shear rate of 300000 s(-1). These data demonstrate that equilibrium clusters of lysozyme are destabilized at high shear rates.
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Affiliation(s)
- D C F Wieland
- Institute for Materials Research, Helmholtz-Zentrum Geestacht: Centre for Materials and Coast Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany
| | - V M Garamus
- Institute for Materials Research, Helmholtz-Zentrum Geestacht: Centre for Materials and Coast Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany
| | - T Zander
- Institute for Materials Research, Helmholtz-Zentrum Geestacht: Centre for Materials and Coast Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany
| | - C Krywka
- Institute for Materials Research, Helmholtz-Zentrum Geestacht: Centre for Materials and Coast Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany
| | - M Wang
- Department of Chemistry, Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, Stockholm 10044, Sweden
| | - A Dedinaite
- Department of Chemistry, Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, Stockholm 10044, Sweden
| | - P M Claesson
- Department of Chemistry, Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, Stockholm 10044, Sweden
| | - R Willumeit-Römer
- Institute for Materials Research, Helmholtz-Zentrum Geestacht: Centre for Materials and Coast Research, Max-Planck-Strasse 1, Geesthacht 21502, Germany
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9
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Riest J, Nägele G. Short-time dynamics in dispersions with competing short-range attraction and long-range repulsion. SOFT MATTER 2015; 11:9273-9280. [PMID: 26426932 DOI: 10.1039/c5sm02099a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dynamic clustering of globular Brownian particles in dispersions exhibiting competing short-range attraction and long-range repulsion (SALR) such as low-salinity protein solutions has gained a lot of interest over the past few years. While the structure of the various cluster phases has been intensely explored, little is known about the dynamics of SALR systems. We present the first systematic theoretical study of short-time diffusion and rheological transport properties of two-Yukawa potential SALR systems in the single-particle dominated dispersed-fluid phase, using semi-analytic methods where the salient hydrodynamic interactions are accounted for. We show that the dynamics has unusual features compared to reference systems with pure repulsion or attraction. Results are discussed for the hydrodynamic function characterizing short-time diffusion that reveals an intermediate-range-order (cluster) peak, self-diffusion and sedimentation coefficients, and high-frequency viscosity. As important applications, we discuss the applicability of two generalized Stokes-Einstein relations, and assess the wavenumber range required for the determination of self-diffusion in a dynamic scattering experiment.
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Affiliation(s)
- Jonas Riest
- Forschungszentrum Jülich GmbH, ICS-3 - Soft Condensed Matter, 52425 Jülich, Germany. and Jülich-Aachen Research Alliance JARA - Soft Matter, 52425 Jülich, Germany
| | - Gerhard Nägele
- Forschungszentrum Jülich GmbH, ICS-3 - Soft Condensed Matter, 52425 Jülich, Germany. and Jülich-Aachen Research Alliance JARA - Soft Matter, 52425 Jülich, Germany
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10
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Luong TQ, Kapoor S, Winter R. Pressure-A Gateway to Fundamental Insights into Protein Solvation, Dynamics, and Function. Chemphyschem 2015; 16:3555-71. [DOI: 10.1002/cphc.201500669] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Indexed: 01/11/2023]
Affiliation(s)
- Trung Quan Luong
- Department of Chemistry and Chemical Biology, Physical Chemistry; TU Dortmund University, Dortmund; Otto-Hahn-Str. 6 d-44221 Dortmund Germany
| | - Shobhna Kapoor
- Department of Chemistry and Chemical Biology, Physical Chemistry; TU Dortmund University, Dortmund; Otto-Hahn-Str. 6 d-44221 Dortmund Germany
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Physical Chemistry; TU Dortmund University, Dortmund; Otto-Hahn-Str. 6 d-44221 Dortmund Germany
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11
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Boire A, Menut P, Morel MH, Sanchez C. Osmotic compression of anisotropic proteins: interaction properties and associated structures in wheat gliadin dispersions. J Phys Chem B 2015; 119:5412-21. [PMID: 25839358 DOI: 10.1021/acs.jpcb.5b01673] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this Article, we investigated the interaction properties of wheat gliadins, properties that are at the basis of their functionality in wheat grain and in food matrixes. We established the equation of state of our isolate by osmotic compression and characterized the concentration-induced structural transitions, from the secondary structure of proteins to the rheological properties. We evidenced three thermodynamical regimes corresponding to several structuring regimes. First, for Φ < 0.03, gliadins behave as repulsive colloids, with a positive second virial coefficient, arising presumably from their surface charge density and/or their steric repulsion. No intermolecular interaction was detected by FT-IR, suggesting that proteins form a stable dispersion. In the second regime, the system becomes more easily compressible, i.e., less repulsive and/or more attractive. It is associated with the disappearance of β-sheet intramolecular structures of the proteins in favor of random coils/α-helix and intermolecular β-sheet interactions. This coincides with the appearance of elasticity and the increase of the apparent viscosity. Finally, in the last regime, for Φ > 0.16, FT-IR spectra show that proteins are strongly interacting via intermolecular interactions. A correlation peak develops in SAXS, revealing a global order in the dispersion. Interestingly, the osmotic pressure applied to extract the solvent is higher than expected from a hard-sphere-like protein and we highlighted a liquid-like state at very high concentration (>450 g L(-1)) which is in contrast with most proteins that form gel or glass at such concentration. In the discussion, we questioned the existence of supramolecular assemblies and the role of the solvation that would lead to this specific behavior.
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Affiliation(s)
- Adeline Boire
- UMR IATE, Université de Montpellier, Montpellier SupAgro, INRA, CIRAD, 2, Place Viala, 34060 Montpellier Cedex 1, France
| | - Paul Menut
- UMR IATE, Université de Montpellier, Montpellier SupAgro, INRA, CIRAD, 2, Place Viala, 34060 Montpellier Cedex 1, France
| | - Marie-Hélène Morel
- UMR IATE, Université de Montpellier, Montpellier SupAgro, INRA, CIRAD, 2, Place Viala, 34060 Montpellier Cedex 1, France
| | - Christian Sanchez
- UMR IATE, Université de Montpellier, Montpellier SupAgro, INRA, CIRAD, 2, Place Viala, 34060 Montpellier Cedex 1, France
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12
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Erlkamp M, Marion J, Martinez N, Czeslik C, Peters J, Winter R. Influence of Pressure and Crowding on the Sub-Nanosecond Dynamics of Globular Proteins. J Phys Chem B 2015; 119:4842-8. [DOI: 10.1021/acs.jpcb.5b01017] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- M. Erlkamp
- Physical
Chemistry I − Biophysical Chemistry, Department of Chemistry and Chemical
Biology, TU Dortmund University, Otto-Hahn-Str. 6, 44227 Dortmund, Germany
| | - J. Marion
- Université
Grenoble Alpes, IBS, 71 avenue des
Martyrs, CS 10090, 38044 Grenoble, France
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 CEDEX 9 Grenoble, France
| | - N. Martinez
- Université
Grenoble Alpes, IBS, 71 avenue des
Martyrs, CS 10090, 38044 Grenoble, France
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 CEDEX 9 Grenoble, France
| | - C. Czeslik
- Physical
Chemistry I − Biophysical Chemistry, Department of Chemistry and Chemical
Biology, TU Dortmund University, Otto-Hahn-Str. 6, 44227 Dortmund, Germany
| | - J. Peters
- Université
Grenoble Alpes, IBS, 71 avenue des
Martyrs, CS 10090, 38044 Grenoble, France
- Institut Laue-Langevin, 71 avenue
des Martyrs, CS 20156, 38042 CEDEX 9 Grenoble, France
| | - R. Winter
- Physical
Chemistry I − Biophysical Chemistry, Department of Chemistry and Chemical
Biology, TU Dortmund University, Otto-Hahn-Str. 6, 44227 Dortmund, Germany
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13
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Winter R. Pressure Effects on the Intermolecular Interaction Potential of Condensed Protein Solutions. Subcell Biochem 2015; 72:151-176. [PMID: 26174381 DOI: 10.1007/978-94-017-9918-8_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Knowledge of the intermolecular interaction potential of proteins as a function of their solution conditions is essential for understanding protein aggregation, crystallization, and the phase behavior of proteins in general. Here, we report on a combined small-angle X-ray scattering and liquid-state theoretical approach to study dense lysozyme solutions as a function of temperature and pressure, but also in the presence of salts and osmolytes of different nature. We show that the pressure-dependent interaction potential of lysozyme changes in a nonlinear fashion over a wide range of temperatures, salt and protein concentrations, indicating that changes of the bulk water structure mediate the pressure dependence of the intermolecular forces. We present also results on the effect of high hydrostatic pressure on the phase behavior of dense lysozyme solutions in the liquid-liquid phase-coexistence region. As also shown in this study, the application of pressure can be used to fine-tune the second virial coefficient of protein solutions, which can be used to control nucleation rates and hence protein crystallization, or to prevent protein aggregation. Moreover, these results are also important for understanding the hydration behavior of biological matter under extreme environmental conditions, and the high stability of dense protein solutions (as they occur intracellularly) in organisms thriving under hydrostatic pressure conditions such as in the deep sea, where pressures up to the 100 MPa-level are reached.
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Affiliation(s)
- Roland Winter
- Physical Chemistry I - Biophysical Chemistry, TU Dortmund University, Otto-Hahn Str. 6, D-44227, Dortmund, Germany,
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Imoto S, Forbert H, Marx D. Water structure and solvation of osmolytes at high hydrostatic pressure: pure water and TMAO solutions at 10 kbar versus 1 bar. Phys Chem Chem Phys 2015; 17:24224-37. [DOI: 10.1039/c5cp03069b] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Solvation structures of trimethylamine N-oxide change drastically due to the increase in the hydrostatic pressure.
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Affiliation(s)
- Sho Imoto
- Ruhr-Universität Bochum
- D-44780 Bochum
- Germany
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