1
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Taniguchi T, Agbo DO, Yang Q, Kapitán J, Wu T, Oyama S, Akai S, Sawama Y, Bouř P. Raman optical activity study of deuterated sugars: deuterium labelling as a tool for structural analysis. Phys Chem Chem Phys 2024; 26:21568-21574. [PMID: 39082369 DOI: 10.1039/d4cp02406k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Structural analyses using Raman optical activity (ROA) spectroscopy conventionally rely on vibrational signals in the fingerprint region ranging from 100 to 1800 cm-1. Use of deuterium labelling to observe ROA signals in the C-D stretching region provides additional information about a local structure of large molecular systems. So far, the potential of C-D stretching ROA signals for structural analysis has rarely been explored. In the present work, we synthesized model deuterated glucose monosaccharides and studied their ROA properties by employing molecular dynamics and density functional theory to interpret the spectra. A good agreement between the simulated and experimental spectra is achieved when the proper conformer ratios are considered. This shows the usefulness of ROA spectroscopy assisted by deuterium labelling for stereochemical and conformational analysis.
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Affiliation(s)
- Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, North 21 West 11, Sapporo 001-0021, Japan.
| | - Davidson Obinna Agbo
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, North 21 West 11, Sapporo 001-0021, Japan.
| | - Qin Yang
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague, Czech Republic
| | - Josef Kapitán
- Department of Optics, Palacký University Olomouc, 17. listopadu 12, 77146 Olomouc, Czech Republic
| | - Tao Wu
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague, Czech Republic
| | - Shuki Oyama
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoshinari Sawama
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague, Czech Republic
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2
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Chen Q, Zhang M, Liu Y, Liu W, Peng C, Zheng L. Sulfated Polysaccharides with Anticoagulant Potential: A Review Focusing on Structure-Activity Relationship and Action Mechanism. Chem Biodivers 2024; 21:e202400152. [PMID: 38600639 DOI: 10.1002/cbdv.202400152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/12/2024]
Abstract
Thromboembolism is the culprit of cardiovascular diseases, leading to the highest global mortality rate. Anticoagulation emerges as the primary approach for managing thrombotic conditions. Notably, sulfated polysaccharides exhibit favorable anticoagulant efficacy with reduced side effects. This review focuses on the structure-anticoagulant activity relationship of sulfated polysaccharides and the underlying action mechanisms. It is concluded that chlorosulfonicacid-pyridine method serves as the preferred technique to synthesize sulfated polysaccharides. The anticoagulant activity of sulfated polysaccharides is linked to the substitution site of sulfate groups, degree of substitution, molecular weight, main side chain structure, and glycosidic bond conformation. Moreover, sulfated polysaccharides exert anticoagulant activity via various pathways, including the inhibition of blood coagulation factors, activation of antithrombin III and heparin cofactor II, antiplatelet aggregation, and promotion of the fibrinolytic system.
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Affiliation(s)
- Qianfeng Chen
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu, 215500, China
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315000, China
| | - Mengjiao Zhang
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu, 215500, China
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, Jiangsu, 225000, China
| | - Yue Liu
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315000, China
| | - Wei Liu
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu, 215500, China
| | - Cheng Peng
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu, 215500, China
| | - Lixue Zheng
- School of Biology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu, 215500, China
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3
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Sacco P, Piazza F, Marsich E, Abrami M, Grassi M, Donati I. Ionic Strength Impacts the Physical Properties of Agarose Hydrogels. Gels 2024; 10:94. [PMID: 38391424 PMCID: PMC11154414 DOI: 10.3390/gels10020094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 02/24/2024] Open
Abstract
Agarose is a natural polysaccharide known for its ability to form thermoreversible hydrogels. While the effects of curing temperature and polysaccharide concentration on mechanical properties have been discussed in the literature, the role of ionic strength has been less studied. In the present manuscript, we investigate the effects of supporting salt concentration and the role of cation (i.e. Na+ or Li+, neighbors in the Hofmeister series), on the setting and performance of agarose hydrogels. Compressive and rheological measurements show that the supporting salts reduce the immediate elastic response of agarose hydrogels, with Li+ showing a stronger effect than Na+ at high ionic strength, while they significantly increase the extent of linear stress-strain response (i.e., linear elasticity). The presence of increasing amounts of added supporting salt also leads to a reduction in hysteresis during mechanical deformation due to loading and unloading cycles, which is more pronounced with Li+ than with Na+. The combination of rheological measurements and NMR relaxometry shows a mesh size in agarose hydrogels in the order of 6-17 nm, with a thickness of the water layer bound to the biopolymer of about 3 nm. Of note, the different structuring of the water within the hydrogel network due to the different alkali seems to play a role for the final performance of the hydrogels.
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Affiliation(s)
- Pasquale Sacco
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 5, I-34127 Trieste, Italy; (F.P.); (I.D.)
| | - Francesco Piazza
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 5, I-34127 Trieste, Italy; (F.P.); (I.D.)
| | - Eleonora Marsich
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Piazza dell’Ospitale 1, I-34129 Trieste, Italy;
| | - Michela Abrami
- Department of Engineering and Architecture, University of Trieste, Via A. Valerio 6/1, I-34127 Trieste, Italy; (M.A.); (M.G.)
| | - Mario Grassi
- Department of Engineering and Architecture, University of Trieste, Via A. Valerio 6/1, I-34127 Trieste, Italy; (M.A.); (M.G.)
| | - Ivan Donati
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 5, I-34127 Trieste, Italy; (F.P.); (I.D.)
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4
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Double-interpenetrating nanostructured networks of marine polysaccharides possessing properties comparable to synthetic polymers. Proc Natl Acad Sci U S A 2022; 119:e2204073119. [PMID: 36215498 PMCID: PMC9586260 DOI: 10.1073/pnas.2204073119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Sustainable circular economy requires materials that possess a property profile comparable to synthetic polymers and, additionally, processing and sourcing of raw materials that have a small environmental footprint. Here, we present a paradigm for processing marine biopolymers into materials that possess both elastic and plastic behavior within a single system involving a double-interpenetrating polymer network comprising the elastic phase of dynamic physical cross-links and stress-dissipating ionically cross-linked domains. As a proof of principle, films possessing more than twofold higher elastic modulus, ultimate tensile strength, and yield stress than those of polylactic acid were realized by blending two water-soluble marine polysaccharides, namely alginic acid (Alg) with physically cross-linkable carboxylated agarose (CA) followed by ionic cross-linking with a divalent cation. Dried CAAlg films showed homogeneous nano-micro-scale domains, with yield stress and size of the domains scaling inversely with calcium concentration. Through surface activation/cross-linking using calcium, CAAlg films could be further processed using wet bonding to yield laminated structures with interfacial failure loads (13.2 ± 0.81 N) similar to the ultimate loads of unlaminated films (10.09 ± 1.47 N). Toward the engineering of wood-marine biopolymer composites, an array of lines of CAAlg were printed on wood veneers (panels), dried, and then bonded following activation with calcium to yield fully bonded wood two-ply laminate. The system presented herein provides a blueprint for the adoption of marine algae-derived polysaccharides in the development of sustainable high-performance materials.
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5
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Sun P, Liu W, Yang D, Zhang Y, Xiong W, Li S, Chen J, Tian J, Zhang L. Stable Zn Anodes Enabled by High-Modulus Agarose Gel Electrolyte with Confined Water Molecule Mobility. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Betschart MU, Sarem M, Shastri VP, Lüdeke S. Reversible, β-sheet-dependent self-assembly of the phosphoprotein phosvitin is controlled by the concentration and valency of cations. Phys Chem Chem Phys 2022; 24:11791-11800. [PMID: 35506877 DOI: 10.1039/d1cp05493g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hyperphosphorylated protein phosvitin (PV) undergoes a pH-dependent transition between PII- and β-sheet secondary structures, a process deemed crucial for its role in the promotion of biogenic apatite formation. The transition occurs surprisingly slowly (minutes to hours). This is consistent with a slow aggregation process involving ionic interactions of charged groups on the protein surface. Herein, we determined the associated transition pK values and time constants through matrix least-squares (MLS) global fitting of a series of pH- and time-dependent circular dichroism (CD) spectra recorded in the presence of different mono-, bi- and trivalent cations. Supporting our results with dynamic light scattering data, we clearly identified a close correlation of β-sheet transition and the formation of small aggregates at low pH. This process is inhibited in the presence of all tested cations with the strongest effects for trivalent cations (Fe3+ and Al3+). In the presence of Ca2+ and Mg2+, larger higher-order particles are formed from PV in the β-sheet conformation, as identified from the interpretation of differential scattering observed in the CD spectra. Our observations are consistent with the existence of a multi-step equilibrium between aggregated and non-aggregated species of PV. The equilibrium is highly sensitive to the environment pH and salt concentration with exceptional behavior in the presence of divalent cations such as Ca2+ and Mg2+.
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Affiliation(s)
- Martin U Betschart
- Institut für Pharmazeutische Wissenschaften, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany
| | - Melika Sarem
- Institute for Macromolecular Chemistry, Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany.,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany
| | - V Prasad Shastri
- Institute for Macromolecular Chemistry, Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany.,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany
| | - Steffen Lüdeke
- Institut für Pharmazeutische Wissenschaften, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany.,Institut für Pharmazeutische und Biomedizinische Wissenschaften (IPBW), Johannes Gutenberg-Universität Mainz, Staudingerweg 5, 55128 Mainz, Germany.
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7
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Lüdeke S, Lohner P, Stühn LG, Betschart MU, Huber MC, Schreiber A, Schiller SM. Dynamische Strukturänderung und Thermodynamik von Phasentrennprozessen eines Proteinmodells mit intrinsisch ungeordneter/geordneter Struktur. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Steffen Lüdeke
- Institut für Pharmazeutische und Biomedizinische Wissenschaften (IPBW) Johannes Gutenberg-Universität Mainz Staudinger Weg 5 55128 Mainz Deutschland
- Institut für Pharmazeutische Wissenschaften Albert-Ludwigs-Universität Freiburg Albertstraße 25 79104 Freiburg Deutschland
| | - Philipp Lohner
- Institut für Pharmazeutische Wissenschaften Albert-Ludwigs-Universität Freiburg Albertstraße 25 79104 Freiburg Deutschland
| | - Lara G. Stühn
- Zentrum für Biosystemanalyse (ZBSA) Albert-Ludwigs-Universität Freiburg Habsburgerstraße 49 79104 Freiburg Deutschland
| | - Martin U. Betschart
- Institut für Pharmazeutische Wissenschaften Albert-Ludwigs-Universität Freiburg Albertstraße 25 79104 Freiburg Deutschland
| | - Matthias C. Huber
- Cluster of Excellence livMatS @ FIT – Freiburg Center for Interactive Materials and Bioinspired Technologies Albert-Ludwigs-Universität Freiburg Georges-Köhler-Allee 105 79104 Freiburg Deutschland
| | - Andreas Schreiber
- Zentrum für Biosystemanalyse (ZBSA) Albert-Ludwigs-Universität Freiburg Habsburgerstraße 49 79104 Freiburg Deutschland
| | - Stefan M. Schiller
- Zentrum für Biosystemanalyse (ZBSA) Albert-Ludwigs-Universität Freiburg Habsburgerstraße 49 79104 Freiburg Deutschland
- Cluster of Excellence livMatS @ FIT – Freiburg Center for Interactive Materials and Bioinspired Technologies Albert-Ludwigs-Universität Freiburg Georges-Köhler-Allee 105 79104 Freiburg Deutschland
- IMTEK – Institut für Mikrosystemtechnik Albert-Ludwigs-Universität Freiburg Georges-Köhler-Allee 103 79104 Freiburg Deutschland
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8
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Lüdeke S, Lohner P, Stühn LG, Betschart MU, Huber MC, Schreiber A, Schiller SM. Dynamic Structural Changes and Thermodynamics in Phase Separation Processes of an Intrinsically Disordered-Ordered Protein Model. Angew Chem Int Ed Engl 2022; 61:e202112738. [PMID: 34806270 PMCID: PMC9299898 DOI: 10.1002/anie.202112738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/21/2021] [Indexed: 01/03/2023]
Abstract
Elastin-like proteins (ELPs) are biologically important proteins and models for intrinsically disordered proteins (IDPs) and dynamic structural transitions associated with coacervates and liquid-liquid phase transitions. However, the conformational status below and above coacervation temperature and its role in the phase separation process is still elusive. Employing matrix least-squares global Boltzmann fitting of the circular dichroism spectra of the ELPs (VPGVG)20 , (VPGVG)40 , and (VPGVG)60 , we found that coacervation occurs sharply when a certain number of repeat units has acquired β-turn conformation (in our sequence setting a threshold of approx. 20 repeat units). The character of the differential scattering of the coacervate suspensions indicated that this fraction of β-turn structure is still retained after polypeptide assembly. Such conformational thresholds may also have a role in other protein assembly processes with implications for the design of protein-based smart materials.
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Affiliation(s)
- Steffen Lüdeke
- Institut für Pharmazeutische und Biomedizinische Wissenschaften (IPBW)Johannes Gutenberg-Universität MainzStaudinger Weg 555128MainzGermany
- Institut für Pharmazeutische WissenschaftenAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2579104FreiburgGermany
| | - Philipp Lohner
- Institut für Pharmazeutische WissenschaftenAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2579104FreiburgGermany
| | - Lara G. Stühn
- Zentrum für Biosystemanalyse (ZBSA)Albert-Ludwigs-Universität FreiburgHabsburgerstrasse 4979104FreiburgGermany
| | - Martin U. Betschart
- Institut für Pharmazeutische WissenschaftenAlbert-Ludwigs-Universität FreiburgAlbertstrasse 2579104FreiburgGermany
| | - Matthias C. Huber
- Cluster of Excellence livMatS @ FIT—Freiburg Center for Interactive Materials and Bioinspired TechnologiesAlbert-Ludwigs-Universität FreiburgGeorges-Köhler-Allee 10579104FreiburgGermany
| | - Andreas Schreiber
- Zentrum für Biosystemanalyse (ZBSA)Albert-Ludwigs-Universität FreiburgHabsburgerstrasse 4979104FreiburgGermany
| | - Stefan M. Schiller
- Zentrum für Biosystemanalyse (ZBSA)Albert-Ludwigs-Universität FreiburgHabsburgerstrasse 4979104FreiburgGermany
- Cluster of Excellence livMatS @ FIT—Freiburg Center for Interactive Materials and Bioinspired TechnologiesAlbert-Ludwigs-Universität FreiburgGeorges-Köhler-Allee 10579104FreiburgGermany
- IMTEK—Institut für MikrosystemtechnikAlbert-Ludwigs-Universität FreiburgGeorges-Köhler-Allee 10379104FreiburgGermany
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9
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Palivec V, Johannessen C, Kaminský J, Martinez-Seara H. Use of Raman and Raman optical activity to extract atomistic details of saccharides in aqueous solution. PLoS Comput Biol 2022; 18:e1009678. [PMID: 35051172 PMCID: PMC8806073 DOI: 10.1371/journal.pcbi.1009678] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/01/2022] [Accepted: 01/03/2022] [Indexed: 12/13/2022] Open
Abstract
Sugars are crucial components in biosystems and industrial applications. In aqueous environments, the natural state of short saccharides or charged glycosaminoglycans is floating and wiggling in solution. Therefore, tools to characterize their structure in a native aqueous environment are crucial but not always available. Here, we show that a combination of Raman/ROA and, on occasions, NMR experiments with Molecular Dynamics (MD) and Quantum Mechanics (QM) is a viable method to gain insights into structural features of sugars in solutions. Combining these methods provides information about accessible ring puckering conformers and their proportions. It also provides information about the conformation of the linkage between the sugar monomers, i.e., glycosidic bonds, allowing for identifying significantly accessible conformers and their relative abundance. For mixtures of sugar moieties, this method enables the deconvolution of the Raman/ROA spectra to find the actual amounts of its molecular constituents, serving as an effective analytical technique. For example, it allows calculating anomeric ratios for reducing sugars and analyzing more complex sugar mixtures to elucidate their real content. Altogether, we show that combining Raman/ROA spectroscopies with simulations is a versatile method applicable to saccharides. It allows for accessing many features with precision comparable to other methods routinely used for this task, making it a viable alternative. Furthermore, we prove that the proposed technique can scale up by studying the complicated raffinose trisaccharide, and therefore, we expect its wide adoption to characterize sugar structural features in solution.
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Affiliation(s)
- Vladimír Palivec
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | | | - Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Hector Martinez-Seara
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
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10
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Kaminský J, Horáčková F, Biačková N, Hubáčková T, Socha O, Kubelka J. Double Hydrogen Bonding Dimerization Propensity of Aqueous Hydroxy Acids Investigated Using Vibrational Optical Activity. J Phys Chem B 2021; 125:11350-11363. [PMID: 34612644 DOI: 10.1021/acs.jpcb.1c05480] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lactic and malic acids are key substances in a number of biochemical processes in living cells and are also utilized in industry. Vibrational spectroscopy represents an efficient and sensitive way to study their structure and interactions. Since water is the natural environment, proper understanding of their molecular dynamics in aqueous solutions is of critical importance. To this end, we employed Raman spectroscopy and Raman optical activity (ROA) to study the conformation of l-lactic and l-malic acids in water (while varying pH, temperature, and concentration), with special emphasis on their double hydrogen bonding dimerization propensity. Raman and ROA experimental data were supported by extensive theoretical calculations of the vibrational properties and by additional experiments (IR absorption, vibrational circular dichroism, and NMR). Conformational behavior of the acids in water was described by molecular dynamics simulations. Reliability of the results was verified by calculating the vibrational properties of populated conformers and by comparing thus obtained spectral features with the experimental data. Calculations estimated the incidence of H-bonded dimers in water to be low in lactic acid and comparable to monomers in malic acid. The "hybrid" approach presented here reveals limitations of relying on the experimental spectra alone to study dimer formation.
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Affiliation(s)
- Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Františka Horáčková
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Nina Biačková
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Tereza Hubáčková
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Ondřej Socha
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Jan Kubelka
- University of Wyoming, 651 N. 19th Street, Laramie, Wyoming 82072, United States
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11
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Kuzucu M, Vera G, Beaumont M, Fischer S, Wei P, Shastri VP, Forget A. Extrusion-Based 3D Bioprinting of Gradients of Stiffness, Cell Density, and Immobilized Peptide Using Thermogelling Hydrogels. ACS Biomater Sci Eng 2021; 7:2192-2197. [PMID: 33970597 PMCID: PMC8207502 DOI: 10.1021/acsbiomaterials.1c00183] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/06/2021] [Indexed: 01/09/2023]
Abstract
To study biological processes in vitro, biomaterials-based engineering solutions to reproduce the gradients observed in tissues are necessary. We present a platform for the 3D bioprinting of functionally graded biomaterials based on carboxylated agarose, a bioink amendable by extrusion bioprinting. Using this bioink, objects with a gradient of stiffness and gradient of cell concentration were printed. Functionalization of carboxylated agarose with maleimide moieties that react in minutes with a cysteine-terminated cell-adhesion peptide allowed us to print objects with a gradient of an immobilized peptide. This approach paves the way toward the development of tissue mimics with gradients.
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Affiliation(s)
- Merve Kuzucu
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - Grace Vera
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - Marco Beaumont
- School
of Chemistry and Physics, Queensland University
of Technology, 2 George
St, Brisbane City, Queensland 4000, Australia
- Institute
of Chemistry of Renewable Resources, University
of Natural Resources and Life Sciences (BOKU), Konrad-Lorenz-Straße 24 3430 Tulln, Austria
| | - Sascha Fischer
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - Pan Wei
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - V. Prasad Shastri
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
- BIOSS,
Centre for Cell Signalling Studies, Schänzlestr. 18, 79104 Freiburg, Germany
| | - Aurelien Forget
- Institute
for Macromolecular Chemistry, University
of Freiburg, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
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12
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All-dielectric chiral-field-enhanced Raman optical activity. Nat Commun 2021; 12:3062. [PMID: 34031409 PMCID: PMC8144208 DOI: 10.1038/s41467-021-23364-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 04/20/2021] [Indexed: 11/10/2022] Open
Abstract
Raman optical activity (ROA) is effective for studying the conformational structure and behavior of chiral molecules in aqueous solutions and is advantageous over X-ray crystallography and nuclear magnetic resonance spectroscopy in sample preparation and cost performance. However, ROA signals are inherently minuscule; 3–5 orders of magnitude weaker than spontaneous Raman scattering due to the weak chiral light–matter interaction. Localized surface plasmon resonance on metallic nanoparticles has been employed to enhance ROA signals, but suffers from detrimental spectral artifacts due to its photothermal heat generation and inability to efficiently transfer and enhance optical chirality from the far field to the near field. Here we demonstrate all-dielectric chiral-field-enhanced ROA by devising a silicon nanodisk array and exploiting its dark mode to overcome these limitations. Specifically, we use it with pairs of chemical and biological enantiomers to show >100x enhanced chiral light–molecule interaction with negligible artifacts for ROA measurements. Raman optical activity (ROA) is useful for studying conformational structure and behavior of chiral molecules, but is limited by the weak signals. Here, the authors demonstrate 100x signal enhancement via an all-dielectric approach, using a silicon nanodisk array and exploiting its dark mode.
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13
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Gu Y, Schwarz B, Forget A, Barbero A, Martin I, Shastri VP. Advanced Bioink for 3D Bioprinting of Complex Free-Standing Structures with High Stiffness. Bioengineering (Basel) 2020; 7:E141. [PMID: 33171883 PMCID: PMC7711998 DOI: 10.3390/bioengineering7040141] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/02/2020] [Accepted: 11/03/2020] [Indexed: 12/15/2022] Open
Abstract
One of the challenges in 3D-bioprinting is the realization of complex, volumetrically defined structures, that are also anatomically accurate and relevant. Towards this end, in this study we report the development and validation of a carboxylated agarose (CA)-based bioink that is amenable to 3D printing of free-standing structures with high stiffness at physiological temperature using microextrusion printing without the need for a fugitive phase or post-processing or support material (FRESH). By blending CA with negligible amounts of native agarose (NA) a bioink formulation (CANA) which is suitable for printing with nozzles of varying internal diameters under ideal pneumatic pressure was developed. The ability of the CANA ink to exhibit reproducible sol-gel transition at physiological temperature of 37 °C was established through rigorous characterization of the thermal behavior, and rheological properties. Using a customized bioprinter equipped with temperature-controlled nozzle and print bed, high-aspect ratio objects possessing anatomically-relevant curvature and architecture have been printed with high print reproducibility and dimension fidelity. Objects printed with CANA bioink were found to be structurally stable over a wide temperature range of 4 °C to 37 °C, and exhibited robust layer-to-layer bonding and integration, with evenly stratified structures, and a porous interior that is conducive to fluid transport. This exceptional layer-to-layer fusion (bonding) afforded by the CANA bioink during the print obviated the need for post-processing to stabilize printed structures. As a result, this novel CANA bioink is capable of yielding large (5-10 mm tall) free-standing objects ranging from simple tall cylinders, hemispheres, bifurcated 'Y'-shaped and 'S'-shaped hollow tubes, and cylinders with compartments without the need for support and/or a fugitive phase. Studies with human nasal chondrocytes showed that the CANA bioink is amenable to the incorporation of high density of cells (30 million/mL) without impact on printability. Furthermore, printed cells showed high viability and underwent mitosis which is necessary for promoting remodeling processes. The ability to print complex structures with high cell densities, combined with excellent cell and tissue biocompatibility of CA bodes well for the exploitation of CANA bioinks as a versatile 3D-bioprinting platform for the clinical translation of regenerative paradigms.
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Affiliation(s)
- Yawei Gu
- Institute for Macromolecular Chemistry, University of Freiburg, 79104 Freiburg, Germany; (Y.G.); (B.S.); (A.F.)
| | - Benjamin Schwarz
- Institute for Macromolecular Chemistry, University of Freiburg, 79104 Freiburg, Germany; (Y.G.); (B.S.); (A.F.)
| | - Aurelien Forget
- Institute for Macromolecular Chemistry, University of Freiburg, 79104 Freiburg, Germany; (Y.G.); (B.S.); (A.F.)
| | - Andrea Barbero
- Tissue Engineering Laboratory, Department of Biomedicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (A.B.); (I.M.)
| | - Ivan Martin
- Tissue Engineering Laboratory, Department of Biomedicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (A.B.); (I.M.)
| | - V. Prasad Shastri
- Institute for Macromolecular Chemistry, University of Freiburg, 79104 Freiburg, Germany; (Y.G.); (B.S.); (A.F.)
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14
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Palivec V, Kopecký V, Jungwirth P, Bouř P, Kaminský J, Martinez-Seara H. Simulation of Raman and Raman optical activity of saccharides in solution. Phys Chem Chem Phys 2020; 22:1983-1993. [DOI: 10.1039/c9cp05682c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
All conformers and anomeric forms of sugars in solutions together with the surrounding waters need to be averaged for reliable simulations of vibrational spectra.
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Affiliation(s)
- Vladimír Palivec
- Institute of Organic Chemistry and Biochemistry
- Czech Academy of Sciences
- Prague 6
- Czech Republic
| | - Vladimír Kopecký
- Institute of Physics
- Faculty of Mathematics and Physics
- Charles University
- Prague 2
- Czech Republic
| | - Pavel Jungwirth
- Institute of Organic Chemistry and Biochemistry
- Czech Academy of Sciences
- Prague 6
- Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry
- Czech Academy of Sciences
- Prague 6
- Czech Republic
| | - Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry
- Czech Academy of Sciences
- Prague 6
- Czech Republic
- Gilead Sciences & IOCB Research Center
| | - Hector Martinez-Seara
- Institute of Organic Chemistry and Biochemistry
- Czech Academy of Sciences
- Prague 6
- Czech Republic
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15
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Masciotti V, Piantanida L, Naumenko D, Amenitsch H, Fanetti M, Valant M, Lei D, Ren G, Lazzarino M. A DNA origami plasmonic sensor with environment-independent read-out. NANO RESEARCH 2019; 12:2900-2907. [PMID: 37799163 PMCID: PMC10552622 DOI: 10.1007/s12274-019-2535-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 09/24/2019] [Accepted: 10/06/2019] [Indexed: 10/07/2023]
Abstract
DNA origami is a promising technology for its reproducibility, flexibility, scalability and biocompatibility. Among the several potential applications, DNA origami has been proposed as a tool for drug delivery and as a contrast agent, since a conformational change upon specific target interaction may be used to release a drug or produce a physical signal, respectively. However, its conformation should be robust with respect to the properties of the medium in which either the recognition or the read-out take place, such as pressure, viscosity and any other unspecific interaction other than the desired target recognition. Here we report on the read-out robustness of a tetragonal DNA-origami/gold-nanoparticle hybrid structure able to change its configuration, which is transduced in a change of its plasmonic properties, upon interaction with a specific DNA target. We investigated its response when analyzed in three different media: aqueous solution, solid support and viscous gel. We show that, once a conformational variation is produced, it remains unaffected by the subsequent physical interactions with the environment.
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Affiliation(s)
- Valentina Masciotti
- CNR-IOM, AREA Science Park, Basovizza Trieste I-34149, Italy
- PhD Course in Nanotechnology, University of Trieste, Trieste I-34127, Italy
| | - Luca Piantanida
- CNR-IOM, AREA Science Park, Basovizza Trieste I-34149, Italy
| | - Denys Naumenko
- CNR-IOM, AREA Science Park, Basovizza Trieste I-34149, Italy
- Institute for Physics of Semiconductors, National Academy of Sciences of Ukraine, Kyiv 03028, Ukraine
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Graz A-8010, Austria
| | - Mattia Fanetti
- Materials Research Laboratory, University of Nova Gorica, Nova Gorica SI-5000, Slovenia
| | - Matjaž Valant
- Materials Research Laboratory, University of Nova Gorica, Nova Gorica SI-5000, Slovenia
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Dongsheng Lei
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley CA 94720, USA
- School of Physical Science and Technology, Electron Microscopy Center of LZU, Lanzhou University, Lanzhou 730000, China
| | - Gang Ren
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley CA 94720, USA
| | - Marco Lazzarino
- CNR-IOM, AREA Science Park, Basovizza Trieste I-34149, Italy
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16
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Marolt M, Lüdeke S. Studying NAD(P)H cofactor-binding to alcohol dehydrogenases through global analysis of circular dichroism spectra. Phys Chem Chem Phys 2019; 21:1671-1681. [PMID: 30328850 DOI: 10.1039/c8cp04869j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The initial step in reactions catalyzed by NAD(P)H-dependent alcohol dehydrogenases (ADHs) is the binding of the cofactor to the active site. To study this process, we measured NAD(P)H concentration-dependent circular dichroism (CD) in the presence of purified enzymes (ADH from horse liver, HLADH; ADH-A from Rhodococcus ruber; YGL157w from Saccharomyces cerevisiae) or enzyme-containing whole cell extract (ADH from Lactobacillus brevis, LbADH). We determined the proportions of binding and non-binding NAD(P)H and the associated dissociation constants (Kd) from matrix least-squares global fitting of law of mass action-derived model. Furthermore, the fitting allowed the back calculation of CD spectra corresponding to the cofactor in its bound conformation. With increasing pH and/or increasing ionic strength, we detected an increase in Kd for the NADH·HLADH complex with the shape of the bound cofactor conformation spectrum remaining unaffected. While the bound cofactor spectrum for the ADH-A·NADH complex was similar to that for HLADH, the corresponding spectra obtained for the NADPH-dependent enzymes YGL157w and LbADH exhibited opposite signs of the most prominent band. In comparison to CD spectra calculated on cofactor geometries from the crystal structures at the sTD-DFT level, we found that the sign of the bound cofactor spectrum correlates with the orientation of the nicotinamide ring of the cofactor in the active site. These results demonstrate the usefulness of the global analysis of cofactor titration CD spectra to study the role of cofactor binding and its geometry in ADH catalysis.
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Affiliation(s)
- Marija Marolt
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstraße 25, 79104 Freiburg, Germany.
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17
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Bertula K, Martikainen L, Munne P, Hietala S, Klefström J, Ikkala O, Nonappa. Strain-Stiffening of Agarose Gels. ACS Macro Lett 2019; 8:670-675. [PMID: 35619522 DOI: 10.1021/acsmacrolett.9b00258] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Strain-stiffening is one of the characteristic properties of biological hydrogels and extracellular matrices, where the stiffness increases upon increased deformation. Whereas strain-stiffening is ubiquitous in protein-based materials, it has been less observed for polysaccharide and synthetic polymer gels. Here we show that agarose, that is, a common linear polysaccharide, forms helical fibrillar bundles upon cooling from aqueous solution. The hydrogels with these semiflexible fibrils show pronounced strain-stiffening. However, to reveal strain-stiffening, suppressing wall slippage turned as untrivial. Upon exploring different sample preparation techniques and rheological architectures, the cross-hatched parallel plate geometries and in situ gelation in the rheometer successfully prevented the slippage and resolved the strain-stiffening behavior. Combining with microscopy, we conclude that strain-stiffening is due to the semiflexible nature of the agarose fibrils and their geometrical connectivity, which is below the central-force isostatic critical connectivity. The biocompatibility and the observed strain-stiffening suggest the potential of agarose hydrogels in biomedical applications.
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Affiliation(s)
- Kia Bertula
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, P.O. Box 15100, FI-00076, Espoo, Finland
| | - Lahja Martikainen
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, P.O. Box 15100, FI-00076, Espoo, Finland
| | - Pauliina Munne
- Research Programs Unit/Translational Cancer Medicine Program and HiLIFE, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland
| | - Sami Hietala
- Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014, HU, Helsinki, Finland
| | - Juha Klefström
- Research Programs Unit/Translational Cancer Medicine Program and HiLIFE, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland
| | - Olli Ikkala
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, P.O. Box 15100, FI-00076, Espoo, Finland
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, P.O.
Box 15100, FI-00076, Espoo, Finland
| | - Nonappa
- Department of Applied Physics, Molecular Materials Group, Aalto University School of Science, P.O. Box 15100, FI-00076, Espoo, Finland
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, P.O.
Box 15100, FI-00076, Espoo, Finland
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18
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Arya N, Forget A, Sarem M, Shastri VP. RGDSP functionalized carboxylated agarose as extrudable carriers for chondrocyte delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:103-111. [DOI: 10.1016/j.msec.2019.01.080] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 12/11/2018] [Accepted: 01/20/2019] [Indexed: 01/23/2023]
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19
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McIlvain G, Ganji E, Cooper C, Killian ML, Ogunnaike BA, Johnson CL. Reliable preparation of agarose phantoms for use in quantitative magnetic resonance elastography. J Mech Behav Biomed Mater 2019; 97:65-73. [PMID: 31100487 DOI: 10.1016/j.jmbbm.2019.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/28/2019] [Accepted: 05/02/2019] [Indexed: 12/28/2022]
Abstract
Agarose phantoms are one type of phantom commonly used in developing in vivo brain magnetic resonance elastography (MRE) sequences because they are inexpensive and easy to work with, store, and dispose of; however, protocols for creating agarose phantoms are non-standardized and often result in inconsistent phantoms with significant variability in mechanical properties. Many magnetic resonance imaging (MRI) and ultrasound studies use phantoms, but often these phantoms are not tailored for desired mechanical properties and as such are too stiff or not mechanically consistent enough to be used in MRE. In this work, we conducted a systematic study of agarose phantom creation parameters to identify those factors that are most conducive to producing mechanically consistent agarose phantoms for MRE research. We found that cooling rate and liquid temperature affected phantom homogeneity. Phantom stiffness is affected by agar concentration (quadratically), by final liquid temperature and salt content in phantoms, and by the interaction of these two metrics each with stir rate. We captured and quantified the implied relationships with a regression model that can be used to estimate stiffness of resulting phantoms. Additionally, we characterized repeatability, stability over time, impact on MR signal parameters, and differences in agar gel microstructure. This protocol and regression model should prove beneficial in future MRE development studies that use phantoms to determine stiffness measurement accuracy.
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Affiliation(s)
- Grace McIlvain
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - Elahe Ganji
- Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - Catherine Cooper
- Department of Linguistics and Cognitive Science, University of Delaware, Newark, DE, USA
| | - Megan L Killian
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA
| | - Babatunde A Ogunnaike
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, USA
| | - Curtis L Johnson
- Department of Biomedical Engineering, University of Delaware, Newark, DE, USA.
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20
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Van de Vondel E, Herrebout W, Johannessen C. Tracking Conformational Changes in Phosvitin throughout a Crowding-Agent-Based Titration. Chembiochem 2019; 20:770-777. [PMID: 30451361 DOI: 10.1002/cbic.201800581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/11/2022]
Abstract
The sensitivity of Raman optical activity (ROA) towards small conformational changes is explored by tracking the structural changes in an intrinsically disordered protein-phosvitin-induced by different concentrations of crowding agent. It is shown that ROA is capable of tracking small conformational changes involving β-sheet and α-helical secondary structural properties of the protein. Furthermore, it is indicated that the influences of the crowding agents employed, Ficoll 70 and dextran 70, on the structural properties of phosvitin differ significantly, with the structural changes induced by the presence of Ficoll 70 being more pronounced and already being visible at a lower concentration. The data also suggest that some spectral changes do not arise from a change in the secondary structure of the protein, but are related to differences in interaction between the phosphorylated residues of the protein and the sugar-based crowding agent.
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Affiliation(s)
- Evelien Van de Vondel
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Wouter Herrebout
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Christian Johannessen
- Molecular Spectroscopy Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
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21
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Dudek M, Zajac G, Szafraniec E, Wiercigroch E, Tott S, Malek K, Kaczor A, Baranska M. Raman Optical Activity and Raman spectroscopy of carbohydrates in solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:597-612. [PMID: 30196153 DOI: 10.1016/j.saa.2018.08.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/02/2018] [Accepted: 08/11/2018] [Indexed: 06/08/2023]
Abstract
This comprehensive study on selected 14 carbohydrates in water solution is an extension of previously published one focused only on solid state analysis. Here, Raman spectroscopy was used as a dedicated method for analysis of carbohydrates in solution, both using a normal effect (RS) and its chiral analogue: Raman Optical Activity spectroscopy (ROA). The compounds were selected as biologically important and representative of all groups: monosaccharides, disaccharides, trisaccharides, cyclodextrines and polysaccharides. RS and ROA spectra are presented together with an expanded discussion on various structures and conformations of studied carbohydrates in the solution taking into account particular regions, i.e. (1) low wavenumber region (250-600 cm-1), (2) anomeric region (600-950 cm-1), (3) fingerprint region (950-1200 cm-1) and (4) CH2and COH deformations region (1200-1500 cm-1). So, the following information can be obtained about: (1) the absolute configuration of the anomeric centre; (2) the configuration of the anomeric centre and the orientation of the anomeric hydroxyl group; (3) the ring structures and the relative orientation of substituents and (4) the conformation of the exocyclic CH2OH (4), respectively. Raman spectroscopy and Raman Optical Activity were shown as unique tools to study complex structures of carbohydrates.
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Affiliation(s)
- Monika Dudek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Grzegorz Zajac
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Ewelina Szafraniec
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Ewelina Wiercigroch
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Szymon Tott
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Kamilla Malek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Agnieszka Kaczor
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Malgorzata Baranska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland.
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22
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Profant V, Johannessen C, Blanch EW, Bouř P, Baumruk V. Effects of sulfation and the environment on the structure of chondroitin sulfate studied via Raman optical activity. Phys Chem Chem Phys 2019; 21:7367-7377. [DOI: 10.1039/c9cp00472f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Raman optical activity reflects differences in the secondary structure of chondroitin caused by its sulfation.
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Affiliation(s)
- Václav Profant
- Institute of Physics
- Faculty of Mathematics and Physics
- Charles University
- 121 16 Prague 2
- Czech Republic
| | | | | | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Vladimír Baumruk
- Institute of Physics
- Faculty of Mathematics and Physics
- Charles University
- 121 16 Prague 2
- Czech Republic
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