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Yoshiba K, Yasuda Y, Christensen BE, Kondo C, Miyazaki Y, Nakano M. Association with Imidazole in the Cooperative Order-Disorder Transition in Aqueous Solution of Schizophyllan. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1748-1756. [PMID: 35089712 DOI: 10.1021/acs.langmuir.1c02838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Schizophyllan, a triple helical polysaccharide, exhibits cooperative order-disorder transition (CODT) in aqueous solutions. The transition transforms the ordered structure (triple helix I) formed between the branched side chains and solvent molecules into the disordered structure (triple helix II) without dissociation of the triple helix. The CODT behaviors in H2O-imidazole mixtures containing HCl with different molar ratios of imidazole/HCl were investigated by adiabatic calorimetry and differential scanning calorimetry on two schizophyllan solutions with different molar masses. The transition temperature (Tr) and the transition enthalpy (ΔHr) significantly depended on both of the mole fractions of imidazole and imidazole/HCl. The composition dependences of Tr and ΔHr in H2O-imidazole mixtures were analyzed with linear cooperative transition theory for the solvent-stabilizing effect in the mixture with active compounds. Theoretical analyses confirmed that both imidazole and imidazolium ions in the solutions competitively interact with the side chain of the triple helix.
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Affiliation(s)
- Kazuto Yoshiba
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Tenjin-cho 1-5-1, Kiryu, Gunma 376-8515, Japan
| | - Yota Yasuda
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Tenjin-cho 1-5-1, Kiryu, Gunma 376-8515, Japan
| | - Bjørn E Christensen
- Norwegian Biopolymer Laboratory, Department of Biotechnology and Food Science, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway
| | - Chisaki Kondo
- Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yuji Miyazaki
- Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Motohiro Nakano
- Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
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Effects of carboxylation of the side chains on the order-disorder transition in aqueous solution of schizophyllan, a triple helical polysaccharide. Carbohydr Polym 2017; 168:79-85. [DOI: 10.1016/j.carbpol.2017.03.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/06/2017] [Accepted: 03/11/2017] [Indexed: 11/22/2022]
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Kishikawa Y, Seki Y, Shingai K, Kita R, Shinyashiki N, Yagihara S. Dielectric Relaxation for Studying Molecular Dynamics of Pullulan in Water. J Phys Chem B 2013; 117:9034-41. [DOI: 10.1021/jp403606r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuki Kishikawa
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Yuki Seki
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Kou Shingai
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Rio Kita
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Naoki Shinyashiki
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
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Tintar D, Samouillan V, Dandurand J, Lacabanne C, Pepe A, Bochicchio B, Tamburro AM. Human tropoelastin sequence: dynamics of polypeptide coded by exon 6 in solution. Biopolymers 2009; 91:943-52. [PMID: 19603496 DOI: 10.1002/bip.21282] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Calorimetric studies were performed on exon 6 in powdered form and in solution [water and 2,2,2-trifluoroethanol (TFE), a structure-inducing solvent or cosolvent]. Dynamic dielectric spectroscopy (DDS) analyses were realized in water and 20% TFE. The major role of solvent-peptide organization is evidenced with these techniques. Calorimetric measurements reveal the structural water organization around the polypeptide as well as the presence of hydrophobic interactions in TFE solution. Dielectric measurements showed for exon 6/water a decrease of relaxations times of bulk solvent implying a faster dynamics with a slight increase of the activation entropy, suggesting that exon 6 probably creates disorder within the solvent. For TFE/water mixtures, an influence of exon 6 on its environment was seen with a relaxation associated with the exon 6/solvent interactions reinforced by storage of 72 h. Finally, exon 6/solvent interactions were clearly observed with addition of TFE.
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Affiliation(s)
- D Tintar
- Laboratoire de Physique des Polymères, CIRIMAT UMR 5085, Institut Carnot, Université Paul Sabatier, Toulouse, France
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Bocchinfuso G, Palleschi A, Mazzuca C, Coviello T, Alhaique F, Marletta G. Theoretical and Experimental Study on a Self-Assembling Polysaccharide Forming Nanochannels: Static and Dynamic Effects Induced by a Soft Confinement. J Phys Chem B 2008; 112:6473-83. [DOI: 10.1021/jp076074f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gianfranco Bocchinfuso
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
| | - Antonio Palleschi
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
| | - Claudia Mazzuca
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
| | - Tommasina Coviello
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
| | - Franco Alhaique
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
| | - Giovanni Marletta
- Dipartimento di Scienze e Tecnologie Chimiche, University of Roma “Tor Vergata”, via della Ricerca Scientifica, 00133 Roma, Italy, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria, 95125 Catania, Italy
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Gilmore J, McKenzie RH. Quantum Dynamics of Electronic Excitations in Biomolecular Chromophores: Role of the Protein Environment and Solvent. J Phys Chem A 2008; 112:2162-76. [DOI: 10.1021/jp710243t] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Joel Gilmore
- Department of Physics, University of Queensland, Brisbane 4072 Australia
| | - Ross H. McKenzie
- Department of Physics, University of Queensland, Brisbane 4072 Australia
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Okobira T, Miyoshi K, Uezu K, Sakurai K, Shinkai S. Molecular dynamics studies of side chain effect on the beta-1,3-D-glucan triple helix in aqueous solution. Biomacromolecules 2008; 9:783-8. [PMID: 18257529 DOI: 10.1021/bm700511d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
beta-1,3-D-glucans have been isolated from fungi as right-handed 6(1) triple helices. They are categorized by the side chains bound to the main triple helix through beta-(1-->6)-D-glycosyl linkage. Indeed, since a glucose-based side chain is water soluble, the presence and frequency of glucose-based side chains give rise to significant variation in the physical properties of the glucan family. Curdlan has no side chains and self-assembles to form an water-insoluble triple helical structure, while schizophyllan, which has a 1,6-D-glucose side chain on every third glucose unit along the main chain, is completely water soluble. A thermal fluctuation in the optical rotatory dispersion is observed for the side chain, indicating probable co-operative interaction between the side chains and water molecules. This paper documents molecular dynamics simulations in aqueous solution for three models of the beta-1,3-D-glucan series: curdlan (no side chain), schizophyllan (a beta-(1-->6)-D-glycosyl side-chain at every third position), and a hypothetical triple helix with a side chain at every sixth main-chain glucose unit. A decrease was observed in the helical pitch as the population of the side chain increased. Two types of hydrogen bonding via water molecules, the side chain/main chain and the side chain/side chain hydrogen bonding, play an important role in determination of the triple helix conformation. The formation of a one-dimensional cavity of diameter about 3.5 A was observed in the schizophyllan triple helix, while curdlan showed no such cavity. The side chain/side chain hydrogen bonding in schizophyllan and the hypothetical beta-1,3-D-glucan triple helix could cause the tilt of the main-chain glucose residues to the helix.
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Affiliation(s)
- Tadashi Okobira
- Department of Chemical Processes and Environments, Faculty of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka 808-0135, Japan
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Beneduci A, Chidichimo G, Tripepi S, Perrotta E, Cufone F. Antiproliferative effect of millimeter radiation on human erythromyeloid leukemia cell line K562 in culture: Ultrastructural- and metabolic-induced changes. Bioelectrochemistry 2007; 70:214-20. [DOI: 10.1016/j.bioelechem.2006.07.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Revised: 06/19/2006] [Accepted: 07/07/2006] [Indexed: 11/26/2022]
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Sletmoen M, Stokke BT, Geissler E. Small angle x-ray scattering study of local structure and collapse transition of (1,3)-β-D-glucan-chitosan gels. J Chem Phys 2006; 125:054908. [PMID: 16942258 DOI: 10.1063/1.2234476] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Scleroglucan is a (1,3)-beta-D-glucan polysaccharide produced by the fungus Sclerotium. Dissolved in water at room temperature it adopts a linear, rigid, triple helical structure. Gelation of scleroglucan can be obtained by Schiff-base formation between partly periodate oxidized scleroglucan and the primary amine groups of chitosan. The scleraldehyde-chitosan gels exhibit a collapse transition when exposed to volume fractions of isopropanol, Wp, larger than 65%. The aim of the present study is to provide structural information concerning the local polymer distribution and the collapse transition in (1,3)-beta-D-glucan-chitosan gels. Small angle x-ray scattering was used to investigate solutions and gels of scleroglucan in water, as well as in an aqueous mixture containing 65% isopropanol. The results reveal that in aqueous solution, the polysaccharide scleroglucan chains have an approximately cylindrical cross section of external diameter close to 17 A. The gels display the same local structure, but form clusters on a longer distance scale. For the collapsed gels in the water-isopropanol mixture, partial phase separation occurs in which ordered domains of approximate size of 110 A develop. This study indicates that local ordering in liquid-crystalline-type domains is a possible molecular mechanism contributing to the collapse of gels composed of semiflexible polymers. The triple helical structure of the molecule appears not to be conserved in the majority phase in this solvent, but it is conserved in the liquid crystalline domains.
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Affiliation(s)
- Marit Sletmoen
- Biophysics and Medical Technology, Department of Physics, The Norwegian University of Science and Technology, NTNU, NO-7491 Trondheim, Norway.
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