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Giri SK, Gour R, Kartha KPR. Diazepinium perchlorate: a neutral catalyst for mild, solvent-free acetylation of carbohydrates and other substances. RSC Adv 2017. [DOI: 10.1039/c6ra28882k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Diazepinium perchlorate-promoted acetylation of free as well as partially protected sugars, phenols, thiophenols, thiols, other alcohols and amines is described.
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Affiliation(s)
- Santosh Kumar Giri
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- SAS Nagar
- India
| | - Rajesh Gour
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- SAS Nagar
- India
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2
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Time-effective and reliable solid-state structure evaluation of selected peracetylated β-maltose derivatives by means of grid search, genetic algorithm and DFT calculations. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Dedola S, Hughes DL, Field RA. Peracetylated alpha-D-glucopyranosyl fluoride and peracetylated alpha-maltosyl fluoride. Acta Crystallogr C 2010; 66:o124-7. [PMID: 20203408 PMCID: PMC2855592 DOI: 10.1107/s0108270110003641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Accepted: 01/29/2010] [Indexed: 04/10/2024] Open
Abstract
The X-ray analyses of 2,3,4,6-tetra-O-acetyl-alpha-D-glucopyranosyl fluoride, C(14)H(19)FO(9), (I), and the corresponding maltose derivative 2,3,4,6-tetra-O-acetyl-alpha-D-glucopyranosyl-(1-->4)-2,3,6-tri-O-acetyl-alpha-D-glucopyranosyl fluoride, C(26)H(35)FO(17), (II), are reported. These add to the series of published alpha-glycosyl halide structures; those of the peracetylated alpha-glucosyl chloride [James & Hall (1969). Acta Cryst. A25, S196] and bromide [Takai, Watanabe, Hayashi & Watanabe (1976). Bull. Fac. Eng. Hokkaido Univ. 79, 101-109] have been reported already. In our structures, which have been determined at 140 K, the glycopyranosyl ring appears in a regular (4)C(1) chair conformation with all the substituents, except for the anomeric fluoride (which adopts an axial orientation), in equatorial positions. The observed bond lengths are consistent with a strong anomeric effect, viz. the C1-O5 (carbohydrate numbering) bond lengths are 1.381 (2) and 1.381 (3) A in (I) and (II), respectively, both significantly shorter than the C5-O5 bond lengths, viz. 1.448 (2) A in (I) and 1.444 (3) A in (II).
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Affiliation(s)
- Simone Dedola
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich NR4 7UH, England
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4
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Stortz CA, Johnson GP, French AD, Csonka GI. Comparison of different force fields for the study of disaccharides. Carbohydr Res 2009; 344:2217-28. [PMID: 19758584 DOI: 10.1016/j.carres.2009.08.019] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Revised: 08/13/2009] [Accepted: 08/18/2009] [Indexed: 11/30/2022]
Abstract
Eighteen empirical force fields and the semi-empirical quantum method PM3CARB-1 were compared for studying beta-cellobiose, alpha-maltose, and alpha-galabiose [alpha-D-Galp-(1-->4)-alpha-D-Galp]. For each disaccharide, the energies of 54 conformers with differing hydroxymethyl, hydroxyl, and glycosidic linkage orientations were minimized by the different methods, some at two dielectric constants. By comparing these results and the available crystal structure data and/or higher level density functional theory results, it was concluded that the newer parameterizations for force fields (GROMOS, GLYCAM06, OPLS-2005 and CSFF) give results that are reasonably similar to each other, whereas the older parameterizations for Amber, CHARMM or OPLS were more divergent. However, MM3, an older force field, gave energy and geometry values comparable to those of the newer parameterizations, but with less sensitivity to dielectric constant values. These systems worked better than MM2 variants, which were still acceptable. PM3CARB-1 also gave adequate results in terms of linkage and exocyclic torsion angles. GROMOS, GLYCAM06, and MM3 appear to be the best choices, closely followed by MM4, CSFF, and OPLS-2005. With GLYCAM06 and to a lesser extent, CSFF, and OPLS-2005, a number of the conformers that were stable with MM3 changed to other forms.
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Affiliation(s)
- Carlos A Stortz
- Departamento de Química Orgánica-CIHIDECAR, FCEyN-Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
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5
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Francisco C, Herrera A, Kennedy A, Martín A, Melián D, Pérez-Martín I, Quintanal L, Suárez E. Intramolecular 1,8-Hydrogen-Atom Transfer Reactions in (1→4)-O-Disaccharide Systems: Conformational and Stereochemical Requirements. Chemistry 2008; 14:10369-81. [DOI: 10.1002/chem.200801414] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Hydrogen atom transfer experiments provide chemical evidence for the conformational differences between C- and O-glycosides. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.05.166] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Johnson GP, Stevens ED, French AD. Octa-O-propanoyl-β-maltose: crystal structure, acyl stacking, related structures, and conformational analysis. Carbohydr Res 2007; 342:1210-22. [PMID: 17383618 DOI: 10.1016/j.carres.2007.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2006] [Revised: 02/21/2007] [Accepted: 02/22/2007] [Indexed: 10/23/2022]
Abstract
The crystal structure of beta-maltose octapropanoate (1) was solved to improve understanding of di-, oligo-, and polysaccharide conformations. The O6 and O6' atoms are in gg and gt orientations, respectively. Extrapolation of the coordinates of the non-reducing residue and observed linkage bond and torsion angles of 1 [Formula: see text] yields a left-handed helix similar to amylose triacetate I. The phi and psi values of 1 are also similar to those of other crystalline, acylated maltose compounds as well as some hydroxyl-bearing molecules. Acylated maltose moieties are often stabilized by stacking of the carbonyl groups and alpha-carbons on O3 and O2' as well as by the exo-anomeric effect. The conformation of 1 is within the 1-kcal/mol contour on a hybrid energy map built with a dielectric constant of 7.5, but corresponds to higher energies on maps made with lower dielectric constants. In one region of phi,psi space, both hydroxyl-bearing and derivatized maltose moieties are found but no inter-residue, intramolecular hydrogen-bonding occurs. In another region, only hydroxyl-bearing molecules crystallize and O2'...O3 hydrogen bonds are always found. In agreement with the energy surfaces, amylose helices extrapolated from available linkage geometries were almost all left-handed.
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Affiliation(s)
- Glenn P Johnson
- Southern Regional Research Center, US Department of Agriculture, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, United States
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8
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Momany FA, Schnupf U, Willett JL, Bosma WB. DFT study of α-maltose: influence of hydroxyl orientations on the glycosidic bond. Struct Chem 2007. [DOI: 10.1007/s11224-007-9191-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Mendonca S, Laine RA. Synthesis of sterically crowded derivatives of anomeric pairs of d-glucose disaccharides. Carbohydr Res 2005; 340:2055-9. [PMID: 15996644 DOI: 10.1016/j.carres.2005.05.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2005] [Revised: 04/10/2005] [Accepted: 05/28/2005] [Indexed: 11/18/2022]
Abstract
Derivatization of carbohydrates is of considerable interest since the derivatives can be used for structural studies in the field of mass spectrometry. We report here the synthesis of a series of sterically crowded derivatives of various linkage and stereo-isomeric glucose-glucose disaccharides with the impetus being to understand the effect of these derivatized groups on fragmentation of the glycosidic bond and the development of methodology for discernment of the anomeric configuration. The synthesis of per-alkylated (methyl, ethyl, propyl, butyl, and pentyl), per-esterified (acetyl, pivaloyl, mesitoyl), and per-silylated (tert-butyl-dimethyl silyl) glucose--glucose disaccharide derivatives has been reported.
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Affiliation(s)
- Sanford Mendonca
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
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10
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Zhang Q, Jaroniec J, Lee G, Marszalek PE. Direct Detection of Inter-residue Hydrogen Bonds in Polysaccharides by Single-Molecule Force Spectroscopy. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Zhang Q, Jaroniec J, Lee G, Marszalek PE. Direct Detection of Inter‐residue Hydrogen Bonds in Polysaccharides by Single‐Molecule Force Spectroscopy. Angew Chem Int Ed Engl 2005; 44:2723-2727. [PMID: 15786525 DOI: 10.1002/anie.200462067] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qingmin Zhang
- Center for Biologically Inspired Materials and Material Systems, Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA, Fax: (+1) 919-660-8963
| | - Justyna Jaroniec
- Center for Biologically Inspired Materials and Material Systems, Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA, Fax: (+1) 919-660-8963
| | - Gwangrog Lee
- Center for Biologically Inspired Materials and Material Systems, Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA, Fax: (+1) 919-660-8963
| | - Piotr E Marszalek
- Center for Biologically Inspired Materials and Material Systems, Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA, Fax: (+1) 919-660-8963
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12
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Francisco CG, Herrera AJ, Kennedy AR, Melián D, Suárez E. Intramolecular 1,8-Hydrogen Abstraction Between Glucopyranose Units in a Disaccharide Model Promoted by Alkoxy Radicals. Angew Chem Int Ed Engl 2002. [DOI: 10.1002/1521-3757(20020301)114:5<884::aid-ange884>3.0.co;2-s] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Francisco CG, Herrera AJ, Kennedy AR, Melián D, Suárez E. Intramolecular 1,8-hydrogen abstraction between glucopyranose units in a disaccharide model promoted by alkoxy radicals. Angew Chem Int Ed Engl 2002; 41:856-8. [PMID: 12491359 DOI: 10.1002/1521-3773(20020301)41:5<856::aid-anie856>3.0.co;2-f] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cosme G Francisco
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Carretera de La Esperanza 3, 38206 La Laguna, Tenerife, Spain
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Kamitori S, Itazu K, Noguchi K, Okuyama K, Kitamura S, Takeo K, Ohno S. Molecular and crystal structures of two 1,6-anhydro-beta-maltotriose derivatives. Carbohydr Res 1995; 278:195-203. [PMID: 8590442 DOI: 10.1016/0008-6215(95)00258-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Crystal structures of two 1,6-anhydro-beta-maltotriose derivatives, 1,6-anhydro-beta-maltotriose nonaacetate and 6"-bromo-6"-deoxy-1,6-anhydro-beta-maltotriose octaacetate, have been determined. Both structures are isomorphous and belong to the orthorhombic system, space group of P2(1)2(1)2(1), with cell dimensions of a = 15.659(3) A, b = 20.587(6) A, c = 13.023(2) A and a = 15.402(7) A, b = 19.737(8) A, c = 13.481(5) A, respectively. Each molecule has three alpha-(1-->4)-linked glucose units, and two of them have a typical 4C1 chair conformation, while the glucose unit with the 1,6-anhydro bridge has a 1C4 chair-envelope intermediate conformation. In spite of introducing the 1,6-anhydro bridge and acetyl groups, the conformations of the glycosidic linkages in these molecules are almost the same as those of other alpha-(1-->4)-linked oligosaccharides. Crystal structures are stabilized by hydrophobic interactions and by a weak intermolecular hydrogen bond of C-H. . .O.
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Affiliation(s)
- S Kamitori
- Faculty of Technology, Tokyo University of Agriculture and Technology, Japan
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16
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Molecular and crystal structures of 2,3,4,6,1′,3′,4′,6′-octa-O-acetyl-β-sophorose, methyl 2,3,4,6,3′,4′,6′-hepta-O-acetyl-β-sophoroside, and methyl 2,3,4,6,3′,4′-hexa-O-acetyl-6′-deoxy-β-sophoroside. Carbohydr Res 1995. [DOI: 10.1016/0008-6215(95)00093-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Noguchi K, Kobayashi E, Okuyama K, Kitamura S, Takeo K, Ohno S. Molecular and crystal structure of (2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)-(1-->3)- [2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl-(1-->6)]- (2,4-di-O-acetyl-beta-D-glucopyranosyl)- (1-->3)-1,2,4,6-tetra-O-acetyl-beta-D-glucopyranose. Carbohydr Res 1994; 258:35-47. [PMID: 8039186 DOI: 10.1016/0008-6215(94)84073-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Crystals of the tetrasaccharide, (2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)-(1-->3)- [2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl-(1-->6)]- (2,4-di-O-acetyl-beta-D-glucopyranosyl)-(1-->3)- 1,2,4,6-tetra-O-acetyl-beta-D-glucopyranose, belong to the monoclinic system, space group P2(1), with a = 12.709(4), b = 27.767(9), c = 9.567(4) A, beta = 105.07(2) degrees, and Z = 2. The crystal structure was solved by the direct method and refined by the full-matrix least-squares procedure to an R-value of 0.071 for 302- observed reflections in the X-ray data. All the four D-glucopyranose residues have the usual 4C1 chair conformations. The torsional angles at two (1-->3)-beta-linkages were phi(O-5-1-O-1-C-3) = -74 degrees and psi (C-1-O-1-C-3-C-2) = -122 degrees between the nonreducing and the middle residues, and phi = -67 degrees, psi = -111 degrees between the middle and the reducing residues. The orientation about the (1-->6)-beta-linkage was found to be phi(O5-C1-O-1-C-6) = -77 degrees, theta(C1-O-1-C-6-C-5) = 160 degrees, and chi(O-1-C-6-C-5-O-5) = 63 degrees (gt conformation). The primary acetate groups at C-6 of the reducing and the (1-->6)-branched residues were in the gt conformations (O-5-C-5-C-6-O-6 = 81 degrees and 84 degrees, respectively). On the other hand, the gg conformation was observed for the primary acetate group in the nonreducing residue (O-5-C-5-C-6-O-6 = 78 degrees).
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Affiliation(s)
- K Noguchi
- Faculty of Technology, Tokyo University of Agriculture and Technology, Japan
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Ikegami M, Noguchi K, Okuyama K, Kitamura S, Takeo K, Ohno S. Molecular and crystal structure of methyl hepta-O-acetyl-α-laminarabioside. Carbohydr Res 1994. [DOI: 10.1016/0008-6215(94)80053-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Köll P, Petrusová M, Petrus L, Zimmer B, Morf M, Kopf J. Crystal and molecular structures of beta-cellobiosylnitromethane and of beta-maltosylnitromethane heptaacetate. Carbohydr Res 1993; 248:37-43. [PMID: 8252544 DOI: 10.1016/0008-6215(93)84114-l] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The structures of the title compounds have been determined by X-ray crystallography, using direct methods, and have been refined to conventional final residual factors of R = 0.063 and R = 0.046, respectively.
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Affiliation(s)
- P Köll
- Department of Chemistry, The University, Oldenburg, Germany
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21
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Dowd MK, Zeng J, French AD, Reilly PJ. Conformational analysis of the anomeric forms of kojibiose, nigerose, and maltose using MM3. Carbohydr Res 1992; 230:223-44. [PMID: 1394298 DOI: 10.1016/0008-6215(92)84035-q] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Energy surfaces were computed for relative orientations of the relaxed pyranosyl rings of the two anomeric forms of kojibiose, nigerose, and maltose, the (1----2)-alpha, (1----3)-alpha, and (1----4)-alpha-linked D-glucosyl disaccharides, respectively. Twenty-four combinations of starting conformations of the rotatable side-groups were considered for each disaccharide. Optimized structures were calculated using MM3 on a 20 degree grid spacing of the torsional angles about the glycosidic bonds. The energy surfaces of the six disaccharides were similar in many respects but differed in detail within the low-energy regions. The maps also illustrate the importance of the exo-anomeric effect and linkage type in determining the conformational flexibility of disaccharides. Torsional conformations of known crystal structures of maltosyl-containing molecules lie in a lower MM3 energy range than previously reported.
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Affiliation(s)
- M K Dowd
- Department of Chemical Engineering, Iowa State University, Ames 50011
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23
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Imberty A, Chanzy H, Pérez S, Buléon A, Tran V. The double-helical nature of the crystalline part of A-starch. J Mol Biol 1988; 201:365-78. [PMID: 3418703 DOI: 10.1016/0022-2836(88)90144-1] [Citation(s) in RCA: 400] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A new three-dimensional structure of the crystalline part of A-starch is described in which the unit cell contains 12 glucose residues located in two left-handed, parallel-stranded double helices packed in a parallel fashion; four water molecules are located between these helices. Chains are crystallized in a monoclinic lattice with a = 2.124 nm, b = 1.172 nm, c = 1.069 nm and gamma = 123.5 degrees, the c axis being parallel to the helix axis. Systematic absences are consistent with the space group B2. The structure was derived from joint use of electron diffraction of single crystals, X-ray powder patterns decomposed into individual peaks and previously reported X-ray fibre diffraction data after adequate re-indexing. The repeating unit consists of a maltotriose moiety where the glucose residues have the 4C1 pyranose conformation and are alpha(1----4) linked. The conformation of the glycosidic linkage is characterized by torsion angles (phi, psi) which take the values (91.8, -153.2), (85.7, -145.3) and 91.8, -151.3); all the primary hydroxyl groups exist in a gauche-gauche conformation. There are no intramolecular hydrogen bonds. Within the double helix, interstrand stabilization is achieved without any steric conflict and through the occurrence of O(2)...O(6) type hydrogen bonds. The present structure is consistent with both physicochemical and biochemical aspects of the crystalline component of the cereal starch granules.
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Affiliation(s)
- A Imberty
- Centre de Recherche sur les Macromolécules Végétales, C.N.R.S., Saint-Martin d'Hères, France
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Hewitt JM, Linder M, Pérez S, Buleon A. High-resolution, C.P.-M.A.S., 13C-N.M.R. spectra of solid amylodextrins and amylose polymorphs. Carbohydr Res 1986. [DOI: 10.1016/s0008-6215(00)90017-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Lamba D, Burden C, Mackie W, Sheldrick B. The crystal and molecular structure of α-laminaribiose octa-acetate. Carbohydr Res 1986. [DOI: 10.1016/s0008-6215(00)90263-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Pangborn W, Langs D, Pérez S. Regular left-handed fragment of amylose: crystal and molecular structure of methyl-α-maltotrioside, 4H2O. Int J Biol Macromol 1985. [DOI: 10.1016/0141-8130(85)90051-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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