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Glucose-induced structural changes and anomalous diffusion of elastin. Colloids Surf B Biointerfaces 2020; 188:110776. [PMID: 31945631 DOI: 10.1016/j.colsurfb.2020.110776] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/18/2019] [Accepted: 01/04/2020] [Indexed: 01/31/2023]
Abstract
Elastin is the principal protein component of elastic fiber, which renders essential elasticity to connective tissues and organs. Here, we adopted a multi-technique approach to study the transport, viscoelastic, and structural properties of elastin exposed to various glucose concentrations (X=[gluc]/[elastin]). Laser light scattering experiments revealed an anomalous behavior (anomaly exponent, β <0.6) of elastin. In this regime (β <0.6), the diffusion constant decreases by 40% in the presence of glucose (X> 10), which suggests the structural change in elastin. We have observed a peculiar inverse temperature transition of elastin protein, which is a measure of structural change, at 40 °C through rheology experiments. Moreover, we observe its shift towards lower temperature with a higher X. FTIR revealed that the presence of glucose (X < 10) favors the formation of β-sheet structure in elastin. However, for X > 10, dominative crowding effect reduces the mobility of protein and favors the increase in β-turns and γ-turns by 25 ± 1% over the β-sheet (β-sheet decreases by 12 ± 0.8%) and α-helix (α-helix decreases by 13 ± 0.8%). The stiffness of protein is estimated through Flory characteristic ratio, C∞ and found to be increasing with X. These glucose-based structural changes in the elastin may explain the role of glucose in age-related issues of the skin.
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Weißheit S, Kahse M, Kämpf K, Tietze A, Vogel M, Winter R, Thiele CM. Elastin-like Peptide in Confinement: FT-IR and NMR T
1 Relaxation Data. Z PHYS CHEM 2018. [DOI: 10.1515/zpch-2017-1047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
We employed FT-IR and NMR experiments to investigate the influence of a cell-mimicking crowding environment on the structure and dynamics of an elastin-like peptide (ELP) with the sequence GVG(VPGVG)3, which – due to a high number of hydrophobic amino acid side chains – exhibits an inverse temperature transition (ITT). As simplified crowding agent, we used 30 wt% Ficoll. The FT-IR data revealed the well-known broad ITT above ~25°C, as observed by the decrease of the relative population of random coil structures and the concomitant increase of type II β-turns. Interestingly, the addition of Ficoll leads to a destabilizing effect of type II β-turn structures. This is in contrast to the expected excluded-volume effect of the macromolecular crowder, but can be explained by weak interactions of the peptide with the polysaccharide chains of the crowding agent. Further, the crowding agent leads to the onset of a reversal of the folding transition at high temperatures. The full assignment of the ELP allowed for a residue-specific investigation of the dynamic behavior of ELP by NMR. Due to a strong change of microscopic viscosity between native/buffered conditions and crowded conditions, relaxation data remain inconclusive with respect to the observation of an ITT. Hence, no quantitative details in terms of internal conformational changes can be obtained. However, temperature dependent differences in the 13C relaxation behavior between core and terminal parts of the peptide indicate temperature induced changes in the internal dynamics with generally higher internal mobility at chain ends: This is in full agreement with FT-IR data. In harmony with the FT-IR analysis, macromolecular crowding does not lead to significant changes in the relaxation behavior.
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Affiliation(s)
- Susann Weißheit
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie , Technische Universität Darmstadt, Alarich-Weiss-Str. 16 , 64287 Darmstadt , Germany
| | - Marie Kahse
- Physical Chemistry I – Biophysical Chemistry, Faculty of Chemistry and Chemical Biology , TU Dortmund University, Otto-Hahn-Str. 4a , 44227 Dortmund , Germany
| | - Kerstin Kämpf
- Institut für Festkörperphysik , Technische Universität Darmstadt, Hochschulstr. 6 , 64289 Darmstadt , Germany
| | - Alesia Tietze
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie , Technische Universität Darmstadt, Alarich-Weiss-Str. 16 , 64287 Darmstadt , Germany
| | - Michael Vogel
- Institut für Festkörperphysik , Technische Universität Darmstadt, Hochschulstr. 6 , 64289 Darmstadt , Germany
| | - Roland Winter
- Physical Chemistry I – Biophysical Chemistry, Faculty of Chemistry and Chemical Biology , TU Dortmund University, Otto-Hahn-Str. 4a , 44227 Dortmund , Germany
| | - Christina Marie Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie , Technische Universität Darmstadt, Alarich-Weiss-Str. 16 , 64287 Darmstadt , Germany
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7
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Perticaroli S, Ehlers G, Stanley CB, Mamontov E, O'Neill H, Zhang Q, Cheng X, Myles DAA, Katsaras J, Nickels JD. Description of Hydration Water in Protein (Green Fluorescent Protein) Solution. J Am Chem Soc 2016; 139:1098-1105. [PMID: 27783480 DOI: 10.1021/jacs.6b08845] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structurally and dynamically perturbed hydration shells that surround proteins and biomolecules have a substantial influence upon their function and stability. This makes the extent and degree of water perturbation of practical interest for general biological study and industrial formulation. We present an experimental description of the dynamical perturbation of hydration water around green fluorescent protein in solution. Less than two shells (∼5.5 Å) were perturbed, with dynamics a factor of 2-10 times slower than bulk water, depending on their distance from the protein surface and the probe length of the measurement. This dependence on probe length demonstrates that hydration water undergoes subdiffusive motions (τ ∝ q-2.5 for the first hydration shell, τ ∝ q-2.3 for perturbed water in the second shell), an important difference with neat water, which demonstrates diffusive behavior (τ ∝ q-2). These results help clarify the seemingly conflicting range of values reported for hydration water retardation as a logical consequence of the different length scales probed by the analytical techniques used.
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Affiliation(s)
- Stefania Perticaroli
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Georg Ehlers
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Christopher B Stanley
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Eugene Mamontov
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Hugh O'Neill
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Qiu Zhang
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Xiaolin Cheng
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Dean A A Myles
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - John Katsaras
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Jonathan D Nickels
- Shull Wollan Center, a Joint Institute for Neutron Sciences, ‡Quantum Condensed Matter Division, §Biology and Soft Matter Division, ∥Chemical and Engineering Materials Division, and ⊥Center for Molecular Biophysics, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.,Department of Biochemistry and Cellular and Molecular Biology and ∇Department of Physics and Astronomy, University of Tennessee , Knoxville, Tennessee 37996, United States
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Krasnov I, Seydel T, Greving I, Blankenburg M, Vollrath F, Müller M. Strain-dependent fractional molecular diffusion in humid spider silk fibres. J R Soc Interface 2016; 13:20160506. [PMID: 27628174 PMCID: PMC5046950 DOI: 10.1098/rsif.2016.0506] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 08/22/2016] [Indexed: 11/12/2022] Open
Abstract
Spider silk is a material well known for its outstanding mechanical properties, combining elasticity and tensile strength. The molecular mobility within the silk's polymer structure on the nanometre length scale importantly contributes to these macroscopic properties. We have therefore investigated the ensemble-averaged single-particle self-dynamics of the prevailing hydrogen atoms in humid spider dragline silk fibres on picosecond time scales in situ as a function of an externally applied tensile strain. We find that the molecular diffusion in the amorphous fraction of the oriented fibres can be described by a generalized fractional diffusion coefficient Kα that is independent of the observation length scale in the probed range from approximately 0.3-3.5 nm. Kα increases towards a diffusion coefficient of the classical Fickian type with increasing tensile strain consistent with an increasing loss of memory or entropy in the polymer matrix.
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Affiliation(s)
- Igor Krasnov
- Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24098 Kiel, Germany Institute of Materials Research, Helmholtz-Zentrum Geesthacht (HZG), 21502 Geesthacht, Germany
| | - Tilo Seydel
- Institut Max von Laue-Paul Langevin (ILL), CS 20156, 38042 Grenoble, France
| | - Imke Greving
- Institute of Materials Research, Helmholtz-Zentrum Geesthacht (HZG), 21502 Geesthacht, Germany
| | - Malte Blankenburg
- Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24098 Kiel, Germany Institute of Materials Research, Helmholtz-Zentrum Geesthacht (HZG), 21502 Geesthacht, Germany
| | - Fritz Vollrath
- Department of Zoology, University of Oxford, Oxford OX13PS, UK
| | - Martin Müller
- Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24098 Kiel, Germany Institute of Materials Research, Helmholtz-Zentrum Geesthacht (HZG), 21502 Geesthacht, Germany
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9
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Nickels JD, Atkinson J, Papp-Szabo E, Stanley C, Diallo SO, Perticaroli S, Baylis B, Mahon P, Ehlers G, Katsaras J, Dutcher JR. Structure and Hydration of Highly-Branched, Monodisperse Phytoglycogen Nanoparticles. Biomacromolecules 2016; 17:735-43. [DOI: 10.1021/acs.biomac.5b01393] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jonathan D. Nickels
- Joint
Institute for Neutron Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Physics, University of Tennessee, Knoxville, Tennessee 37996, United States
- Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - John Atkinson
- Department
of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Erzsebet Papp-Szabo
- Department
of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Christopher Stanley
- Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Souleymane O. Diallo
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | | | - Benjamin Baylis
- Department
of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Perry Mahon
- Department
of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Georg Ehlers
- Quantum Condensed
Matter Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
| | - John Katsaras
- Joint
Institute for Neutron Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Physics, University of Tennessee, Knoxville, Tennessee 37996, United States
- Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - John R. Dutcher
- Department
of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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