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Quevedo-Tinoco L, Rodríguez-García G, del Río RE, Talero E, Motilva V, Cerda-García-Rojas CM, Joseph-Nathan P, Gómez-Hurtado MA. Strategy for the vibrational circular dichroism study of a glycosylflavonoid evaluated as its peracetate. The case of bioactive 7-O-β-D-glucopyranosylchrysin. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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2
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Taniguchi T. Analysis of Molecular Configuration and Conformation by (Electronic and) Vibrational Circular Dichroism: Theoretical Calculation and Exciton Chirality Method. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tohru Taniguchi
- Faculty of Advanced Life Science, Frontier Research Center for Advanced Material and Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo, Hokkaido 001-0021
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Lu X, Li H, Nafie JW, Pazderka T, Pazderková M, Dukor RK, Nafie LA. A Vibrational Circular Dichroism Microsampling Accessory: Mapping Enhanced Vibrational Circular Dichroism in Amyloid Fibril Films. APPLIED SPECTROSCOPY 2017; 71:1117-1126. [PMID: 28436688 DOI: 10.1177/0003702817701457] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report the first vibrational circular dichroism (VCD) measurement of spatial heterogeneity in a sample using infrared (IR) microsampling. Vibrational circular dichroism spectra are typically measured using a standard IR cell with an IR beam diameter of 10 mm or greater making it impossible to investigate the spatial heterogeneity of a solid film sample. We have constructed a VCD sampling assembly with either 3 mm or 1 mm spatial resolution. An XY-translation stage was used to measure spectra at different spatial locations producing IR and VCD maps of the sample. In addition, a rotating sample stage was employed using a dual photoelastic modulator (PEM) setup to suppress artifacts due to linear birefringence in solid-phase or film samples. Infrared and VCD mapping of an insulin fibril film has been carried out at both 3 and 1 mm spatial resolution, and lysozyme films were mapped at 1 mm resolution. The IR spectra of different spots vary in intensity due primarily to sample thickness. The changes in the VCD intensity across the map largely correlate to corresponding changes in the IR map. Closer inspection of the insulin map revealed changes in the relative intensities of the VCD spectra not present in the parent IR spectra, which indicated differences in the degree of supramolecular chirality of the fibrils in the various spatial regions. For lysozyme films, in addition to different degrees of supramolecular chirality, reversal of the net fibril chirality was observed. The large signal-to-noise ratio observed at 1 mm resolution implies the feasibility of further increasing the spatial resolution by one or two orders of magnitude for protein fibril film samples.
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Affiliation(s)
| | | | | | - Tomáš Pazderka
- 2 Institute of Physics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - Markéta Pazderková
- 2 Institute of Physics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | | | - Laurence A Nafie
- 1 BioTools Inc., Jupiter, FL, USA
- 3 Department of Chemistry, Syracuse University, Syracuse, NY, USA
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Iramain MA, Davies L, Brandán SA. FTIR, HATR and FT-Raman studies on the anhydrous and monohydrate species of maltose in aqueous solution. Carbohydr Res 2016; 428:41-56. [PMID: 27131126 DOI: 10.1016/j.carres.2016.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 03/24/2016] [Accepted: 04/10/2016] [Indexed: 10/21/2022]
Abstract
The structures of α- and β-maltose anhydrous and their corresponding monohydrated species were studied combining the FT-IR, FT-Raman and HATR spectra with DFT calculations. The four structures were optimized in gas and aqueous solution by using the hybrid B3LYP/6-31G* method. The self-consistent force field (SCRF) calculations together with the polarized continuum (PCM) model were used to study the systems in solution while the solvation energies were computed using the solvation model (SM). The calculated structural and vibrational properties could explain the anomerization of maltose in solution, as was reported in the literature while the natural bond orbital (NBO) analyses for those species support clearly the mutarotation equilibria between both forms in solution, evidencing the anhydrous forms the equilibrium: α (45%) ⇔ β (55%), similar to that experimentally reported at 20 °C. Bands of all the species observed in the vibrational spectra support the presence of the anomeric species of maltose in solution while the presence of dimeric species justify the intense IR bands observed in the higher wavenumbers region. The similar gap values for maltose and lactose probably justify that these sugars are reducing sugars while the high values in sucrose could explain that it is a non-reducing sugar. On the other hand, the sweeteners cyclamate and saccharine are most reactive in solution than the sugars maltose, lactose and sucrose, as expected due to their ionic characteristics. The predicted vibrational spectra for the four species of maltose show reasonable concordances with the corresponding experimental ones. The f(δC-O-C) force constants of the glycosidic bonds follow the tendency: maltose > lactose > sucrose.
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Affiliation(s)
- Maximiliano Alberto Iramain
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina
| | - Lilian Davies
- Instituto de Investigaciones para la Industria Química (INIQUI, CONICET), Universidad Nacional de Salta, Av. Bolivia 5150, 4400 Salta, Argentina
| | - Silvia Antonia Brandán
- Cátedra de Química General, Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, 4000, San Miguel de Tucumán, Tucumán, Argentina.
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Wang S, Taniguchi T, Monde K, Kawahata M, Yamaguchi K, Otani Y, Ohwada T. Hydrogen bonding to carbonyl oxygen of nitrogen-pyramidalized amide – detection of pyramidalization direction preference by vibrational circular dichroism spectroscopy. Chem Commun (Camb) 2016; 52:4018-21. [DOI: 10.1039/c6cc00284f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen-bonding to carbonyl of nitrogen-pyramidalized bicyclic β-proline amides can switch the preferred nitrogen-pyramidalization direction, as detected by VCD spectroscopy.
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Affiliation(s)
- Siyuan Wang
- Graduate School of Pharmaceutical Sciences
- University of Tokyo
- Tokyo 113-0033
- Japan
- Research Foundation Itsuu Laboratory
| | - Tohru Taniguchi
- Frontier Research Center for Post-Genome Science and Technology
- Faculty of Advanced Life Science
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Kenji Monde
- Frontier Research Center for Post-Genome Science and Technology
- Faculty of Advanced Life Science
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Masatoshi Kawahata
- Faculty of Pharmaceutical Sciences at Kagawa Campus
- Tokushima Bunri University
- Kagawa 769-2193
- Japan
| | - Kentaro Yamaguchi
- Faculty of Pharmaceutical Sciences at Kagawa Campus
- Tokushima Bunri University
- Kagawa 769-2193
- Japan
| | - Yuko Otani
- Graduate School of Pharmaceutical Sciences
- University of Tokyo
- Tokyo 113-0033
- Japan
| | - Tomohiko Ohwada
- Graduate School of Pharmaceutical Sciences
- University of Tokyo
- Tokyo 113-0033
- Japan
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Batista Jr. JM, Blanch EW, Bolzani VDS. Recent advances in the use of vibrational chiroptical spectroscopic methods for stereochemical characterization of natural products. Nat Prod Rep 2015; 32:1280-302. [DOI: 10.1039/c5np00027k] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A comprehensive look into application of vibrational optical activity methods for conformational and configurational assignments in natural product molecules over the last 15 years is provided.
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Affiliation(s)
- João M. Batista Jr.
- Department of Chemistry
- Federal University of São Carlos – UFSCar
- São Carlos
- Brazil
| | - Ewan W. Blanch
- School of Applied Sciences
- RMIT University
- Melbourne
- Australia
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Quesada-Moreno MM, Azofra LM, Avilés-Moreno JR, Alkorta I, Elguero J, López-González JJ. Conformational preference and chiroptical response of carbohydrates D-ribose and 2-deoxy-D-ribose in aqueous and solid phases. J Phys Chem B 2013; 117:14599-614. [PMID: 24134404 DOI: 10.1021/jp405121s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work targets the structural preferences of D-ribose and 2-deoxy-D-ribose in water solution and solid phase. A theoretical DFT (B3LYP and M06-2X) and MP2 study has been undertaken considering the five possible configurations (open-chain, α-furanose, β-furanose, α-pyranose, and β-pyranose) of these two carbohydrates with a comparison of the solvent treatment using only a continuum solvation model (PCM) and the PCM plus one explicit water molecule. In addition, experimental vibrational studies using both nonchiroptical (IR-Raman) and chiroptical (VCD) techniques have been carried out. The theoretical and experimental results show that α- and β-pyranose forms are the dominant configurations for both compounds. Moreover, it has been found that 2-deoxy-D-ribose presents a non-negligible percentage of open-chain forms in aqueous solution, while in solid phase this configuration is absent.
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Affiliation(s)
- María Mar Quesada-Moreno
- Department of Physical and Analytical Chemistry, University of Jaén , Campus Las Lagunillas, E-23071 Jaén, Spain
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Lin Z, Bendiak B, Rubtsov IV. Discrimination between coupling networks of glucopyranosides varying at a single stereocenter using two-dimensional vibrational correlation spectroscopy. Phys Chem Chem Phys 2012; 14:6179-91. [DOI: 10.1039/c2cp23245f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Roslund MU, Tähtinen P, Niemitz M, Sjöholm R. Complete assignments of the 1H and 13C chemical shifts and JH,H coupling constants in NMR spectra of d-glucopyranose and all d-glucopyranosyl-d-glucopyranosides. Carbohydr Res 2008; 343:101-12. [DOI: 10.1016/j.carres.2007.10.008] [Citation(s) in RCA: 158] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 10/09/2007] [Accepted: 10/11/2007] [Indexed: 10/22/2022]
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Nakahashi A, Taniguchi T, Miura N, Monde K. Stereochemical studies of sialic acid derivatives by vibrational circular dichroism. Org Lett 2007; 9:4741-4. [PMID: 17935341 DOI: 10.1021/ol702042m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Systematic VCD studies of N-acetylneuraminic acid (Neu5Ac), a recognition-related unique carbohydrate, were performed for the first time. Two pairs of anomeric isomers regarding a quaternary C2 asymmetric carbon of Neu5Ac derivatives were synthesized. VCD spectral patterns around the ester carbonyl region, as well as other Mid-IR regions, would be practical markers to distinguish the C2 stereochemistry.
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Affiliation(s)
- Atsufumi Nakahashi
- Graduate School of Advanced Life Science, Frontier Research Center for Post-Genome Science and Technology, Hokkaido University, Kita-ku, Sapporo, Japan
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Taniguchi T, Monde K. Spectrum–Structure Relationship in Carbohydrate Vibrational Circular Dichroism and Its Application to Glycoconjugates. Chem Asian J 2007; 2:1258-66. [PMID: 17768735 DOI: 10.1002/asia.200700180] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Preliminary reports of the nature of the vibrational circular dichroism (VCD) peak at around 1145 cm(-1), which is characteristic of axial glycosidic sugars and is called the glycoside band (J. Am. Chem. Soc. 2004, 126, 9496), have been thoroughly examined. Through systematic carbohydrate measurements, it was found that the sign of the glycoside band reflects not only the anomeric configuration but also the pyranose conformation. Isotope and theoretical studies characterized its vibrational mode as C1-H1 deformation coupled with C1-O1 stretching, which indicates its applicability to more-complicated glycoconjugates. In this study, for the first time, carbohydrate VCD spectra were reliably predicted by means of density functional theory (DFT) calculations. The VCD technique was applied to glycopeptides, and simultaneous analysis of both the carbohydrate and aglycan parts was carried out.
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Affiliation(s)
- Tohru Taniguchi
- Laboratory of Advanced Chemical Biology, Graduate School of Advanced Life Science, Frontier Research Center for Post-Genome Science and Technology, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
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Taniguchi T, Tone I, Monde K. Observation and characterization of a specific vibrational circular dichroism band in phenyl glycosides. Chirality 2007; 20:446-53. [PMID: 17853396 DOI: 10.1002/chir.20465] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Application of vibrational circular dichroism (VCD) spectroscopy to structural analysis of carbohydrates has recently progressed. However, few studies on glycoconjugates VCD have thus far been reported, despite the fact that naturally occurring carbohydrates exist as various glycoconjugates. To further explore the application of the VCD technique, we have measured a series of aromatic glycosides and found that axial aromatic glycosides exhibited a negative band at around 1230 cm(-1) while equatorial ones showed flat features in this region. This is the first structure-spectra relationship on glycoconjugate VCD that distinguishes the stereochemistry of the sugar anomers. Several model compounds were prepared and their vibrational properties calculated by using the density functional theory (DFT) method, which assigned the vibrational mode of this band based on the stretching motion of the glycosidic oxygen and aromatic carbon. This concept that aglycan parts can reflect stereochemical information of sugar moieties may encourage further VCD studies on glycoconjugates to realize practical structural analysis of carbohydrates.
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Affiliation(s)
- Tohru Taniguchi
- Laboratory of Advanced Chemical Biology, Graduate School of Advanced Life Science, Frontier Research Center for Post-Genome Science and Technology, Hokkaido University, Kita-ku, Sapporo 001-0021, Japan
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Taniguchi T, Monde K. Chiroptical Analysis of Glycoconjugates by Vibrational Circular Dichroism (VCD). TRENDS GLYCOSCI GLYC 2007. [DOI: 10.4052/tigg.19.147] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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