1
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Cisse A, Schachner-Nedherer AL, Appel M, Beck C, Ollivier J, Leitinger G, Prassl R, Kornmueller K, Peters J. Dynamics of Apolipoprotein B-100 in Interaction with Detergent Probed by Incoherent Neutron Scattering. J Phys Chem Lett 2021; 12:12402-12410. [PMID: 34939807 DOI: 10.1021/acs.jpclett.1c03141] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Apolipoprotein B-100 (apo B-100) is the protein moiety of both low- and very-low-density lipoproteins, whose role is crucial to cholesterol and triglyceride transport. Aiming at the molecular dynamics' details of apo B-100, scarcely studied, we performed elastic and quasi-elastic incoherent neutron scattering (EINS, QENS) experiments combining different instruments and time scales. Similar to classical membrane proteins, the solubilization results in remaining detergent, here Nonidet P-40 (NP40). Therefore, we propose a framework for QENS studies of protein-detergent complexes, with the introduction of a combined model, including the experimental apo B-100/NP40 ratio. Relying on the simultaneous analysis of all QENS amplitudes, this approach is sensitive enough to separate both contributions. Its application identified two points: (i) apo B-100 slow dynamics and (ii) the acceleration of NP40 dynamics in the presence of apo B-100. Direct translation of the exposed methodology now makes the investigation of more membrane proteins by neutron spectroscopy achievable.
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Affiliation(s)
- Aline Cisse
- Université Grenoble Alpes, CNRS, LiPhy, 38000 Grenoble, France
- Institut Laue Langevin, 38042 Grenoble, France
| | | | | | - Christian Beck
- Institut Laue Langevin, 38042 Grenoble, France
- Institut of Applied Physics, University of Tübingen, 72076 Tübingen, Germany
| | | | | | | | | | - Judith Peters
- Université Grenoble Alpes, CNRS, LiPhy, 38000 Grenoble, France
- Institut Laue Langevin, 38042 Grenoble, France
- Institut Universitaire de France, 75231 Paris, France
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2
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Kämpf K, Demuth D, Zamponi M, Wuttke J, Vogel M. Quasielastic neutron scattering studies on couplings of protein and water dynamics in hydrated elastin. J Chem Phys 2020; 152:245101. [PMID: 32610976 DOI: 10.1063/5.0011107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Performing quasielastic neutron scattering measurements and analyzing both elastic and quasielasic contributions, we study protein and water dynamics of hydrated elastin. At low temperatures, hydration-independent methyl group rotation dominates the findings. It is characterized by a Gaussian distribution of activation energies centered at about Em = 0.17 eV. At ∼195 K, coupled protein-water motion sets in. The hydration water shows diffusive motion, which is described by a Gaussian distribution of activation energies with Em = 0.57 eV. This Arrhenius behavior of water diffusion is consistent with previous results for water reorientation, but at variance with a fragile-to-strong crossover at ∼225 K. The hydration-related elastin backbone motion is localized and can be attributed to the cage rattling motion. We speculate that its onset at ∼195 K is related to a secondary glass transition, which occurs when a β relaxation of the protein has a correlation time of τβ ∼ 100 s. Moreover, we show that its temperature-dependent amplitude has a crossover at the regular glass transition Tg = 320 K of hydrated elastin, where the α relaxation of the protein obeys τα ∼ 100 s. By contrast, we do not observe a protein dynamical transition when water dynamics enters the experimental time window at ∼240 K.
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Affiliation(s)
- Kerstin Kämpf
- Institute of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt, Germany
| | - Dominik Demuth
- Institute of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt, Germany
| | - Michaela Zamponi
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Lichtenbergstraße 1, 85747 Garching, Germany
| | - Joachim Wuttke
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Lichtenbergstraße 1, 85747 Garching, Germany
| | - Michael Vogel
- Institute of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt, Germany
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3
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Saouessi M, Peters J, Kneller GR. Asymptotic analysis of quasielastic neutron scattering data from human acetylcholinesterase reveals subtle dynamical changes upon ligand binding. J Chem Phys 2019; 150:161104. [PMID: 31042885 DOI: 10.1063/1.5094625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this paper, we show that subtle changes in the internal dynamics of human acetylcholinesterase upon ligand binding can be extracted from quasielastic neutron scattering data by employing a nonexponential relaxation model for the intermediate scattering function. The relaxation is here described by a stretched Mittag-Leffler function, which exhibits slow power law decay for long times. Our analysis reveals that binding of a Huperzine A ligand increases the atomic motional amplitudes of the enzyme and slightly slows down its internal diffusive motions. This result is interpreted within an energy landscape picture for the motion of the hydrogen atoms.
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Affiliation(s)
- Melek Saouessi
- Centre de Biophysique Moléculaire, CNRS and Université d'Orléans, Rue Charles Sadron, 45071 Orléans, France
| | - Judith Peters
- Institut Laue Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Gerald R Kneller
- Centre de Biophysique Moléculaire, CNRS and Université d'Orléans, Rue Charles Sadron, 45071 Orléans, France
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4
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Zeller D, Telling MTF, Zamponi M, García Sakai V, Peters J. Analysis of elastic incoherent neutron scattering data beyond the Gaussian approximation. J Chem Phys 2018; 149:234908. [PMID: 30579322 DOI: 10.1063/1.5049938] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
This work addresses the use of the Gaussian approximation as a common tool to extract atomic motions in proteins from elastic incoherent neutron scattering and whether improvements in data analysis and additional information can be obtained when going beyond that. We measured alpha-lactalbumin with different levels of hydration on three neutron backscattering spectrometers, to be able to resolve a wide temporal and spatial range for dynamics. We demonstrate that the Gaussian approximation gives qualitatively similar results to models that include heterogeneity, if one respects a certain procedure to treat the intercept of the elastic intensities with the momentum transfer axis. However, the inclusion of motional heterogeneity provides better fits to the data. Our analysis suggests an approach of limited heterogeneity, where including only two kinds of motions appears sufficient to obtain more quantitative results for the mean square displacement. Finally, we note that traditional backscattering spectrometers pose a limit on the lowest accessible momentum transfer. We therefore suggest that complementary information about the spatial evolution of the elastic intensity close to zero momentum transfer can be obtained using other neutron methods, in particular, neutron spin-echo together with polarization analysis.
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Affiliation(s)
- D Zeller
- Université Grenoble Alpes, CNRS, LiPhy, 140 av. de la Physique, 38000 Grenoble, France
| | - M T F Telling
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
| | - M Zamponi
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstr. 1, 85748 Garching, Germany
| | - V García Sakai
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom
| | - J Peters
- Université Grenoble Alpes, CNRS, LiPhy, 140 av. de la Physique, 38000 Grenoble, France
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5
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Andersson CD, Martinez N, Zeller D, Allgardsson A, Koza MM, Frick B, Ekström F, Peters J, Linusson A. Influence of Enantiomeric Inhibitors on the Dynamics of Acetylcholinesterase Measured by Elastic Incoherent Neutron Scattering. J Phys Chem B 2018; 122:8516-8525. [DOI: 10.1021/acs.jpcb.8b05485] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Nicolas Martinez
- Institut Laue Langevin, F-38042 Grenoble Cedex 9, France
- Université Grenoble Alpes, IBS and LiPhy, F-38000 Grenoble, France
| | - Dominik Zeller
- Institut Laue Langevin, F-38042 Grenoble Cedex 9, France
- Université Grenoble Alpes, IBS and LiPhy, F-38000 Grenoble, France
| | - Anders Allgardsson
- CBRN Defence and Security, Swedish Defence Research Agency, SE-90621 Umeå, Sweden
| | | | - Bernhard Frick
- Institut Laue Langevin, F-38042 Grenoble Cedex 9, France
| | - Fredrik Ekström
- CBRN Defence and Security, Swedish Defence Research Agency, SE-90621 Umeå, Sweden
| | - Judith Peters
- Institut Laue Langevin, F-38042 Grenoble Cedex 9, France
- Université Grenoble Alpes, IBS and LiPhy, F-38000 Grenoble, France
| | - Anna Linusson
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
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6
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Andersson CD, Martinez N, Zeller D, Rondahl SH, Koza MM, Frick B, Ekström F, Peters J, Linusson A. Changes in dynamics of α-chymotrypsin due to covalent inhibitors investigated by elastic incoherent neutron scattering. Phys Chem Chem Phys 2017; 19:25369-25379. [DOI: 10.1039/c7cp04041e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dynamics of chymotrypsin increases when bound to two different covalent inhibitors. These effects were analyzed by univariate and multivariate methods.
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Affiliation(s)
| | - N. Martinez
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - D. Zeller
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - S. H. Rondahl
- CBRN Defence and Security
- Swedish Defence Research Agency
- SE-90621 Umeå
- Sweden
| | - M. M. Koza
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
| | - B. Frick
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
| | - F. Ekström
- CBRN Defence and Security
- Swedish Defence Research Agency
- SE-90621 Umeå
- Sweden
| | - J. Peters
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
- Univ. Grenoble Alpes
- IBS and LiPhy
| | - A. Linusson
- Department of Chemistry
- Umeå University
- SE-90187 Umeå
- Sweden
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7
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Stadler AM, Knieps-Grünhagen E, Bocola M, Lohstroh W, Zamponi M, Krauss U. Photoactivation Reduces Side-Chain Dynamics of a LOV Photoreceptor. Biophys J 2016; 110:1064-74. [PMID: 26958884 DOI: 10.1016/j.bpj.2016.01.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 01/08/2016] [Accepted: 01/20/2016] [Indexed: 11/17/2022] Open
Abstract
We used neutron-scattering experiments to probe the conformational dynamics of the light, oxygen, voltage (LOV) photoreceptor PpSB1-LOV from Pseudomonas putida in both the dark and light states. Global protein diffusion and internal macromolecular dynamics were measured using incoherent neutron time-of-flight and backscattering spectroscopy on the picosecond to nanosecond timescales. Global protein diffusion of PpSB1-LOV is not influenced by photoactivation. Observation-time-dependent global diffusion coefficients were found, which converge on the nanosecond timescale toward diffusion coefficients determined by dynamic light scattering. Mean-square displacements of localized internal motions and effective force constants, <k'>, describing the resilience of the proteins were determined on the respective timescales. Photoactivation significantly modifies the flexibility and the resilience of PpSB1-LOV. On the fast, picosecond timescale, small changes in the mean-square displacement and <k'> are observed, which are enhanced on the slower, nanosecond timescale. Photoactivation results in a slightly larger resilience of the photoreceptor on the fast, picosecond timescale, whereas in the nanosecond range, a significantly less resilient structure of the light-state protein is observed. For a residue-resolved interpretation of the experimental neutron-scattering data, we analyzed molecular dynamics simulations of the PpSB1-LOV X-ray structure. Based on these data, it is tempting to speculate that light-induced changes in the protein result in altered side-chain mobility mostly for residues on the protruding Jα helix and on the LOV-LOV dimer interface. Our results provide strong experimental evidence that side-chain dynamics play a crucial role in photoactivation and signaling of PpSB1-LOV via modulation of conformational entropy.
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Affiliation(s)
- Andreas M Stadler
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich, Jülich, Germany.
| | - Esther Knieps-Grünhagen
- Institute of Molecular Enzyme Technology, Heinrich-Heine-Universität Düsseldorf, Forschungszentrum Jülich, Jülich, Germany
| | - Marco Bocola
- Chair of Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Wiebke Lohstroh
- Heinz Maier-Leibnitz Zentrum, Technische Universität München, Garching, Germany
| | - Michaela Zamponi
- Jülich Centre for Neutron Science (JCNS), Outstation at MLZ, Forschungszentrum Jülich, Garching, Germany
| | - Ulrich Krauss
- Institute of Molecular Enzyme Technology, Heinrich-Heine-Universität Düsseldorf, Forschungszentrum Jülich, Jülich, Germany
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8
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Peters J, Martinez N, Trovaslet M, Scannapieco K, Koza MM, Masson P, Nachon F. Dynamics of human acetylcholinesterase bound to non-covalent and covalent inhibitors shedding light on changes to the water network structure. Phys Chem Chem Phys 2016; 18:12992-3001. [PMID: 27109895 DOI: 10.1039/c6cp00280c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the effects of non-covalent reversible and covalent irreversible inhibitors on human acetylcholinesterase and human butyrylcholinesterase. Remarkably a non-covalent inhibitor, Huperzine A, has almost no effect on the molecular dynamics of the protein, whereas the covalently binding nerve agent soman renders the molecular structure stiffer in its aged form. The modified movements were studied by incoherent neutron scattering on different time scales and they indicate a stabilization and stiffening of aged human acetylcholinesterase. It is not straightforward to understand the forces leading to this strong effect. In addition to the specific interactions of the adduct within the protein, some indications point towards an extensive water structure change for the aged conjugate as water Bragg peaks appeared at cryogenic temperature despite an identical initial hydration state for all samples. Such a change associated to an apparent increase in free water volume upon aging suggests higher ordering of the hydration shell that leads to the stiffening of protein. Thus, several additive contributions seem responsible for the improved flexibility or stiffening effect of the inhibitors rather than a single interaction.
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Affiliation(s)
- Judith Peters
- Univ. Grenoble Alpes, LiPhy, F-38044 Grenoble, France
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9
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Stadler AM, Demmel F, Ollivier J, Seydel T. Picosecond to nanosecond dynamics provide a source of conformational entropy for protein folding. Phys Chem Chem Phys 2016; 18:21527-38. [DOI: 10.1039/c6cp04146a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Myoglobin can be trapped in fully folded structures, partially folded molten globules, and unfolded states under stable equilibrium conditions.
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Affiliation(s)
- Andreas M. Stadler
- Jülich Centre for Neutron Science JCNS and Institute for Complex Systems ICS
- Forschungszentrum Jülich GmbH
- 52425 Jülich
- Germany
| | | | | | - Tilo Seydel
- Institut Laue-Langevin
- 38042 Grenoble Cedex 9
- France
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10
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Bennion BJ, Essiz SG, Lau EY, Fattebert JL, Emigh A, Lightstone FC. A wrench in the works of human acetylcholinesterase: soman induced conformational changes revealed by molecular dynamics simulations. PLoS One 2015; 10:e0121092. [PMID: 25874456 PMCID: PMC4395452 DOI: 10.1371/journal.pone.0121092] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 01/27/2015] [Indexed: 01/06/2023] Open
Abstract
Irreversible inactivation of human acetylcholinesterase (hAChE) by organophosphorous pesticides (OPs) and chemical weapon agents (CWA) has severe morbidity and mortality consequences. We present data from quantum mechanics/molecular mechanics (QM/MM) and 80 classical molecular dynamics (MD) simulations of the apo and soman-adducted forms of hAChE to investigate the effects on the dynamics and protein structure when the catalytic Serine 203 is phosphonylated. We find that the soman phosphonylation of the active site Ser203 follows a water assisted addition-elimination mechanism with the elimination of the fluoride ion being the highest energy barrier at 6.5 kcal/mole. We observe soman-dependent changes in backbone and sidechain motions compared to the apo form of the protein. These alterations restrict the soman-adducted hAChE to a structural state that is primed for the soman adduct to be cleaved and removed from the active site. The altered motions and resulting structures provide alternative pathways into and out of the hAChE active site. In the soman-adducted protein both side and back door pathways are viable for soman adduct access. Correlation analysis of the apo and soman adducted MD trajectories shows that the correlation of gorge entrance and back door motion is disrupted when hAChE is adducted. This supports the hypothesis that substrate and product can use two different pathways as entry and exit sites in the apo form of the protein. These alternative pathways have important implications for the rational design of medical countermeasures.
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Affiliation(s)
- Brian J. Bennion
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore CA, United States of America
| | - Sebnem G. Essiz
- Bioinformatics and Genetics Department, Faculty of Engineering and Natural Sciences, Kadir Has University, 34083 Fatih, Istanbul, Turkey
| | - Edmond Y. Lau
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore CA, United States of America
| | - Jean-Luc Fattebert
- Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore CA, United States of America
| | - Aiyana Emigh
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore CA, United States of America
| | - Felice C. Lightstone
- Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore CA, United States of America
- * E-mail:
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11
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Trapp M, Tehei M, Trovaslet M, Nachon F, Martinez N, Koza MM, Weik M, Masson P, Peters J. Correlation of the dynamics of native human acetylcholinesterase and its inhibited huperzine A counterpart from sub-picoseconds to nanoseconds. J R Soc Interface 2015; 11:20140372. [PMID: 24872501 DOI: 10.1098/rsif.2014.0372] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It is a long debated question whether catalytic activities of enzymes, which lie on the millisecond timescale, are possibly already reflected in variations in atomic thermal fluctuations on the pico- to nanosecond timescale. To shed light on this puzzle, the enzyme human acetylcholinesterase in its wild-type form and complexed with the inhibitor huperzine A were investigated by various neutron scattering techniques and molecular dynamics simulations. Previous results on elastic neutron scattering at various timescales and simulations suggest that dynamical processes are not affected on average by the presence of the ligand within the considered time ranges between 10 ps and 1 ns. In the work presented here, the focus was laid on quasi-elastic (QENS) and inelastic neutron scattering (INS). These techniques give access to different kinds of individual diffusive motions and to the density of states of collective motions at the sub-picoseconds timescale. Hence, they permit going beyond the first approach of looking at mean square displacements. For both samples, the autocorrelation function was well described by a stretched-exponential function indicating a linkage between the timescales of fast and slow functional relaxation dynamics. The findings of the QENS and INS investigation are discussed in relation to the results of our earlier elastic incoherent neutron scattering and molecular dynamics simulations.
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Affiliation(s)
- M Trapp
- Helmholtz-Zentrum Berlin für Materialien und Energie, Lise-Meitner Campus, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - M Tehei
- School of Chemistry, University of Wollongong, New South Wales 2522, Australia Centre for Medical Bioscience, Australian Institute of Nuclear Science and Engineering (AINSE), Menai, New South Wales, Australia
| | - M Trovaslet
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France Institut de Recherche Biomédicale des Armées, 91223 Brétigny sur Orge, France
| | - F Nachon
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France Institut de Recherche Biomédicale des Armées, 91223 Brétigny sur Orge, France
| | - N Martinez
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France Institut Laue Langevin, 38042 Grenoble Cédex 9, France Université Joseph Fourier, UFR PhITEM, 38041 Grenoble Cédex 9, France
| | - M M Koza
- Institut Laue Langevin, 38042 Grenoble Cédex 9, France
| | - M Weik
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France
| | - P Masson
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France
| | - J Peters
- Institut de Biologie Structurale J.-P. Ebel, UMR 5075, CNRS-CEA-UJF, 38042 Grenoble Cédex 9, France Institut Laue Langevin, 38042 Grenoble Cédex 9, France Université Joseph Fourier, UFR PhITEM, 38041 Grenoble Cédex 9, France
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12
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Marion J, Trovaslet M, Martinez N, Masson P, Schweins R, Nachon F, Trapp M, Peters J. Pressure-induced molten globule state of human acetylcholinesterase: structural and dynamical changes monitored by neutron scattering. Phys Chem Chem Phys 2015; 17:3157-63. [DOI: 10.1039/c4cp02992e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We used neutron scattering to study the effects of high hydrostatic pressure on the structure and dynamics of human acetylcholinesterase (hAChE).
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Affiliation(s)
- J. Marion
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Institut Laue Langevin
| | - M. Trovaslet
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Institut de Recherche Biomédicale des Armées
| | - N. Martinez
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Institut Laue Langevin
| | - P. Masson
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Kazan Federal University
| | - R. Schweins
- Institut Laue Langevin
- F-38042 Grenoble Cedex 9
- France
| | - F. Nachon
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Institut Laue Langevin
| | - M. Trapp
- Angewandte Physikalische Chemie
- Universität Heidelberg
- 69120 Heidelberg
- Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie
| | - J. Peters
- Univ. Grenoble Alpes
- IBS
- F-38044 Grenoble
- France
- Institut Laue Langevin
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13
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Stadler AM, Koza MM, Fitter J. Determination of Conformational Entropy of Fully and Partially Folded Conformations of Holo- and Apomyoglobin. J Phys Chem B 2014; 119:72-82. [DOI: 10.1021/jp509732q] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Andreas M. Stadler
- Jülich
Centre for Neutron Science JCNS and Institute for Complex Systems
ICS, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | | | - Jörg Fitter
- Institute
of Complex Systems (ICS-5): Molecular Biophysics, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- I.
Physikalisches Institut (IA), AG Biophysik, RWTH Aachen, Sommerfeldstrasse
14, 52074 Aachen, Germany
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14
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Picosecond dynamics in haemoglobin from different species: A quasielastic neutron scattering study. Biochim Biophys Acta Gen Subj 2014; 1840:2989-99. [DOI: 10.1016/j.bbagen.2014.06.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 11/22/2022]
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15
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Falourd X, Natali F, Peters J, Foucat L. Molecular mobility in Medicago truncatula seed during early stage of germination: Neutron scattering and NMR investigations. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.10.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Peters J, Kneller GR. Motional heterogeneity in human acetylcholinesterase revealed by a non-Gaussian model for elastic incoherent neutron scattering. J Chem Phys 2013; 139:165102. [DOI: 10.1063/1.4825199] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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