1
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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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2
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Dumouilla V, Dussap CG. Online analysis of D-glucose and D-mannose aqueous mixtures using Raman spectroscopy: an in silico and experimental approach. Bioengineered 2021; 12:4420-4431. [PMID: 34308749 PMCID: PMC8806848 DOI: 10.1080/21655979.2021.1955550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 07/08/2021] [Indexed: 11/30/2022] Open
Abstract
Raman spectroscopy was applied to an aqueous solution containing D-mannose and D-glucose at a fixed dry matter content. The Raman measurement apparatus was adapted online at the industrial scale to monitor a bioprocess including an epimerization reaction. Online Raman spectroscopy and deconvolution techniques were successfully applied to monitor in real time the D-mannose and D-glucose concentrations using the Raman shifts at 960 cm-1 and 974 cm-1 respectively. The two anomeric forms, α and β of D-mannose in the pyranose conformation were quantified. In silico analysis of vibrational frequencies and Raman intensities of hydrated structure of D-mannose and D-glucose in the pyranose form for α and β anomers were carried out using a two-step procedure. First molecular dynamics was used to generate the theoretical carbohydrates' structures keeping the experimental dry matter content, then quantum mechanics was used to compute the Raman frequencies and intensities. Computed vibrational frequencies are in satisfactory agreement with the experimental spectra considering a hydration shell approach. Raman intensities are qualitatively in accordance with the experimental data. The interpretation of Raman frequencies and intensities led to acceptable results regarding the current possible structures of D-mannose and D-glucose in aqueous solution. Online Raman spectroscopy coupled with in silico approaches such as quantum mechanics and molecular dynamics methodology is proved to be a valuable tool to quantify the carbohydrates and stereoisomers content in complex aqueous mixtures. This methodology offers a new way to monitor any bioprocesses that encounter aqueous mixtures of D-glucose and D-mannose.
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Affiliation(s)
- Vincent Dumouilla
- CNRS, SIGMA Clermont, Institut Pascal, Université Clermont Auvergne, Clermont-Ferrand, France
- Biotechnology and Process Department, Roquettes Frères, Lestrem, France
| | - Claude Gilles Dussap
- CNRS, SIGMA Clermont, Institut Pascal, Université Clermont Auvergne, Clermont-Ferrand, France
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3
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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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4
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Aerts R, Vanhove J, Herrebout W, Johannessen C. Paving the way to conformationally unravel complex glycopeptide antibiotics by means of Raman optical activity. Chem Sci 2021; 12:5952-5964. [PMID: 35342545 PMCID: PMC8867523 DOI: 10.1039/d1sc01446c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 03/22/2021] [Indexed: 01/06/2023] Open
Abstract
It is crucial for fundamental physical chemistry techniques to find their application in tackling real-world challenges. Hitherto, Raman optical activity (ROA) spectroscopy is one of the examples where a promising future within the pharmaceutical sector is foreseen, but has not yet been established. Namely, the technique is believed to be able to contribute in investigating the conformational behaviour of drug candidates. We, herein, strive towards the alignment of the ROA analysis outcome and the pharmaceutical expectations by proposing a fresh strategy that ensures a more complete, reliable, and transferable ROA study. The strategy consists of the treatment of the conformational space by means of a principal component analysis (PCA) and a clustering algorithm, succeeded by a thorough ROA spectral analysis and a novel way of estimating the contributions of the different chemical fragments to the total ROA spectral intensities. Here, vancomycin, an antibiotic glycopeptide, has been treated; it is the first antibiotic glycopeptide studied by means of ROA and is a challenging compound in ROA terms. By applying our approach we discover that ROA is capable of independently identifying the correct conformation of vancomycin in aqueous solution. In addition, we have a clear idea of what ROA can and cannot tell us regarding glycopeptides. Finally, the glycopeptide class turns out to be a spectroscopically curious case, as its spectral responses are unlike the typical ROA spectral responses of peptides and carbohydrates. This preludes future ROA studies of this intriguing molecular class.
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Affiliation(s)
- Roy Aerts
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Jente Vanhove
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Wouter Herrebout
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Christian Johannessen
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium
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5
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Bogaerts J, Atilaw Y, Peintner S, Aerts R, Kihlberg J, Johannessen C, Erdélyi M. Employing complementary spectroscopies to study the conformations of an epimeric pair of side-chain stapled peptides in aqueous solution. RSC Adv 2021; 11:4200-4208. [PMID: 35424346 PMCID: PMC8694311 DOI: 10.1039/d0ra10167b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 12/21/2020] [Indexed: 12/11/2022] Open
Abstract
Understanding the conformational preferences of free ligands in solution is often necessary to rationalize structure-activity relationships in drug discovery. Herein, we examine the conformational behavior of an epimeric pair of side-chain stapled peptides that inhibit the FAD dependent amine oxidase lysine specific demethylase 1 (LSD1). The peptides differ only at a single stereocenter, but display a major difference in binding affinity. Their Raman optical activity (ROA) spectra are most likely dominated by the C-terminus, obscuring the analysis of the epimeric macrocycle. By employing NMR spectroscopy, we show a difference in conformational behavior between the two compounds and that the LSD1 bound conformation of the most potent compound is present to a measurable extent in aqueous solution. In addition, we illustrate that Molecular Dynamics (MD) simulations produce ensembles that include the most important solution conformations, but that it remains problematic to identify relevant conformations with no a priori knowledge from the large conformational pool. Furthermore, this work highlights the importance of understanding the scope and limitations of the available techniques for conducting conformational analyses. It also emphasizes the importance of conformational selection of a flexible ligand in molecular recognition.
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Affiliation(s)
| | - Yoseph Atilaw
- Department of Chemistry - BMC, Uppsala University SE-751 23 Uppsala Sweden
| | - Stefan Peintner
- Department of Chemistry - BMC, Uppsala University SE-751 23 Uppsala Sweden
| | - Roy Aerts
- Department of Chemistry, University of Antwerp 2020 Antwerp Belgium
| | - Jan Kihlberg
- Department of Chemistry - BMC, Uppsala University SE-751 23 Uppsala Sweden
| | | | - Máté Erdélyi
- Department of Chemistry - BMC, Uppsala University SE-751 23 Uppsala Sweden
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6
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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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7
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Yao X, Fu C, Dai C, Jiang Z, Lei L, Lu W, He Y. Structural changes of orthorhombic α-D-galactose crystal by using Raman spectroscopy at high pressure. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Tang Y, Cheng F, Feng Z, Jia G, Li C. Stereostructural Elucidation of Glucose Phosphorylation by Raman Optical Activity. J Phys Chem B 2019; 123:7794-7800. [PMID: 31335146 DOI: 10.1021/acs.jpcb.9b05968] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Phosphorylation of glucose is the prime step in sugar metabolism and energy storage. Two key glucose phosphates are involved, that is, glucose 6-phosphate (G6P) and α-glucose 1-phosphate (αG1P). The chiral conformation of glucose, G6P, and αG1P plays an essential role in enzyme-mediated conversions. However, few techniques were able to give a direct view of the conformational changes from glucose to G6P and αG1P. Here, Raman optical activity (ROA) was used to elucidate the stereochemical evolution of glucose upon phosphorylation. ROA was found to be extremely sensitive to different phosphorylation sites. A characteristic ROA marker of (+)980 cm-1, originated from the phosphate group symmetric stretching vibration, is observed for αG1P with phosphorylation at chiral C1, while no corresponding ROA signal for G6P with phosphorylation at achiral C6 is observed. Phosphorylation-induced gauch-gauch (gg)/gauch-trans (gt) rotamer distribution changes can be sensitively probed by the sign of the ROA band around 1460 cm-1. A positive ROA band at 1465 cm-1 of glucose corresponds to a higher gt ratio, while a negative band at 1455 cm-1 of G6P suggests a dominant gg population, and the disappearance of this ROA band for αG1P indicates a nearly balanced gg/gt distribution. Meanwhile, the phosphorylation at C6 and C1 could cause dramatic reduction of the conformational flexibility of the adjacent C4-OH and C2-OH, respectively. These stereochemical changes revealed by ROA spectra offer a structural basis on the understanding of sugar phosphorylation from the perspective of chirality.
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Affiliation(s)
- Yuxuan Tang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , China.,University of Chinese Academy of Sciences , No. 19A Yuquan Road , Beijing 100049 , China
| | - Feng Cheng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , China
| | - Zhaochi Feng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , China
| | - Guoqing Jia
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , China
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9
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Mensch C, Bultinck P, Johannessen C. The effect of protein backbone hydration on the amide vibrations in Raman and Raman optical activity spectra. Phys Chem Chem Phys 2019; 21:1988-2005. [PMID: 30633268 DOI: 10.1039/c8cp06423g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Raman and specifically Raman optical activity (ROA) spectroscopy are very sensitive to the solution structure and conformation of biomolecules. Because of this strong conformational sensitivity, density functional theory (DFT) calculations are often used to get a better understanding of the experimentally observed spectral patterns. While e.g. for carbohydrate structure the water molecules that surround the solute have been demonstrated to be of vital importance to get accurate modelled ROA spectra, the effect of explicit water molecules on the calculated ROA patterns of peptides and proteins is less well studied. Here, the effect of protein backbone hydration was studied using DFT calculations of HCO-(l-Ala)5-NH2 in specific secondary structure conformations with different treatments of the solvation. The effect of the explicit water molecules on the calculated spectra mainly arises from the formation of hydrogen bonds with the amide C[double bond, length as m-dash]O and N-H groups. Hydrogen bonding of water with the C[double bond, length as m-dash]O group determines the shape and position of the amide I band. The C[double bond, length as m-dash]O bond length increases upon formation of C[double bond, length as m-dash]OH2O hydrogen bonds. The effect of the explicit water molecules on the amide III vibrations arises from hydrogen bonding of the solvent with both the C[double bond, length as m-dash]O and N-H group, but their contributions to this spectral region differ: geometrically, the formation of a C[double bond, length as m-dash]OH2O bond decreases the C-N bond length, while upon forming a N-HH2O hydrogen bond, the N-H bond length increases.
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Affiliation(s)
- Carl Mensch
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
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10
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Pendrill R, Mutter ST, Mensch C, Barron LD, Blanch EW, Popelier PLA, Widmalm G, Johannessen C. Solution Structure of Mannobioses Unravelled by Means of Raman Optical Activity. Chemphyschem 2019; 20:695-705. [PMID: 30688397 DOI: 10.1002/cphc.201801172] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/25/2019] [Indexed: 01/31/2023]
Abstract
Structural analysis of carbohydrates is a complicated endeavour, due to the complexity and diversity of the samples at hand. Herein, we apply a combined computational and experimental approach, employing molecular dynamics (MD) and density functional theory (DFT) calculations together with NMR and Raman optical activity (ROA) measurements, in the structural study of three mannobiose disaccharides, consisting of two mannoses with varying glycosidic linkages. The disaccharide structures make up the scaffold of high mannose glycans and are therefore important targets for structural analysis. Based on the MD population analysis and NMR, the major conformers of each mannobiose were identified and used as input for DFT analysis. By systematically varying the solvent models used to describe water interacting with the molecules and applying overlap integral analysis to the resulting calculational ROA spectra, we found that a full quantum mechanical/molecular mechanical approach is required for an optimal calculation of the ROA parameters. Subsequent normal mode analysis of the predicted vibrational modes was attempted in order to identify possible marker bands for glycosidic linkages. However, the normal mode vibrations of the mannobioses are completely delocalised, presumably due to conformational flexibility in these compounds, rendering the identification of isolated marker bands unfeasible.
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Affiliation(s)
- Robert Pendrill
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Shaun T Mutter
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.,Department of Natural Sciences, Middlesex University, NW4 4BT, London, UK
| | - Carl Mensch
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171, 2020, Antwerp, Belgium.,Ghent Quantum Chemistry Group Department of Chemistry, University of Ghent, Krijgslaan 281, 9000, Ghent, Belgium
| | - Laurence D Barron
- School of Chemistry, University of Glasgow Joseph Black Building, Glasgow, G12 8QQ, UK
| | - Ewan W Blanch
- School of Science, RMIT University GPO Box 2476, Melbourne, VIC 3001, Australia
| | - Paul L A Popelier
- Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Göran Widmalm
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Christian Johannessen
- Department of Chemistry, University of Antwerp Groenenborgerlaan 171, 2020, Antwerp, Belgium
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11
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Ghidinelli S, Abbate S, Boiadjiev SE, Lightner DA, Longhi G. l-Stercobilin-HCl and d-Urobilin-HCl. Analysis of Their Chiroptical and Conformational Properties by VCD, ECD, and CPL Experiments and MD and DFT Calculations. J Phys Chem B 2018; 122:12351-12362. [DOI: 10.1021/acs.jpcb.8b07954] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Stefan E. Boiadjiev
- Department of Chemistry and Biochemistry, Medical University-Pleven, 1 St. Kl. Ohridski Str., 5800 Pleven, Bulgaria
| | - David A. Lightner
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, 89557-0020 Nevada, United States
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
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12
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Rüther A, Forget A, Roy A, Carballo C, Mießmer F, Dukor RK, Nafie LA, Johannessen C, Shastri VP, Lüdeke S. Unravelling a Direct Role for Polysaccharide β-Strands in the Higher Order Structure of Physical Hydrogels. Angew Chem Int Ed Engl 2017; 56:4603-4607. [DOI: 10.1002/anie.201701019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 02/21/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Anja Rüther
- Institute of Pharmaceutical Sciences; University of Freiburg; Albertstrasse 25 79104 Freiburg Germany
| | - Aurelien Forget
- Science and Engineering Faculty; Queensland University of Technology; Brisbane Australia
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
- BIOSS-Centre for Biological Signalling Studies; University of Freiburg; Germany
| | | | | | - Florian Mießmer
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
| | | | - Laurence A. Nafie
- BioTools, Inc.; Jupiter USA
- Department of Chemistry; Syracuse University; Syracuse USA
| | | | - V. Prasad Shastri
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
- BIOSS-Centre for Biological Signalling Studies; University of Freiburg; Germany
| | - Steffen Lüdeke
- Institute of Pharmaceutical Sciences; University of Freiburg; Albertstrasse 25 79104 Freiburg Germany
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13
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Rüther A, Forget A, Roy A, Carballo C, Mießmer F, Dukor RK, Nafie LA, Johannessen C, Shastri VP, Lüdeke S. Unravelling a Direct Role for Polysaccharide β-Strands in the Higher Order Structure of Physical Hydrogels. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anja Rüther
- Institute of Pharmaceutical Sciences; University of Freiburg; Albertstrasse 25 79104 Freiburg Germany
| | - Aurelien Forget
- Science and Engineering Faculty; Queensland University of Technology; Brisbane Australia
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
- BIOSS-Centre for Biological Signalling Studies; University of Freiburg; Germany
| | | | | | - Florian Mießmer
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
| | | | - Laurence A. Nafie
- BioTools, Inc.; Jupiter USA
- Department of Chemistry; Syracuse University; Syracuse USA
| | | | - V. Prasad Shastri
- Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
- BIOSS-Centre for Biological Signalling Studies; University of Freiburg; Germany
| | - Steffen Lüdeke
- Institute of Pharmaceutical Sciences; University of Freiburg; Albertstrasse 25 79104 Freiburg Germany
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14
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Luber S. Raman Optical Activity Spectra from Density Functional Perturbation Theory and Density-Functional-Theory-Based Molecular Dynamics. J Chem Theory Comput 2017; 13:1254-1262. [DOI: 10.1021/acs.jctc.6b00820] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra Luber
- Department of Chemistry C, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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