Abstract:
The adiabatic potential energy surfaces (PES) of two trisaccharides (β-cellotriose and α-maltotriose) were obtained using the MM3 force field. Each PES can be described by a single 3D contour map for which the energy is plotted against the two ψ glycosidic angles. Given the usually small variations of the φ glycosidic torsional angle in the low-energy regions of disaccharide maps (at least with MM3), it is valid to leave both φ glycosidic angles to relax in the process of building the conformational map of trisaccharides. The surfaces are those expected from the map of disaccharides containing the same linkages and monosaccharide units (i.e., β-cellobiose and α-maltose), with second-order factors altering the 'symmetry' of both linkages. A large low-energy region appears for β-cellotriose, comprising four minima in close proximity, with barriers between them below 0.6 kcal/mol. On the other hand, for α-maltotriose a main global minimum is observed, with several surrounding local minima. The surfaces obtained agree with single-crystal X-ray data on these trisaccharides and derivatives. A reduction of the linkage flexibilities is observed when passing from the disaccharides to the trisaccharides. Furthermore, the linkage closer to the reducing end appears to be less flexible than the linkage closer to the non-reducing end. © 2002 Elsevier Science Ltd. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Depicting the MM3 potential energy surfaces of trisaccharides by single contour maps: Application to β-cellotriose and α-maltotriose |
Autor: | Stortz, C.A.; Cerezo, A.S. |
Filiación: | Depto. Quim. Organica-CIHIDECAR, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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Palabras clave: | Conformational analysis; MM3; Molecular mechanics; Potential energy surfaces; Ramachandran map; Trisaccharides; Contour measurement; Potential energy; Single crystals; Surfaces; X ray analysis; Glycosidic angles; Carbohydrates; carbohydrate derivative; cellotriose; disaccharide; glycoside; maltotriose; monosaccharide; trisaccharide; unclassified drug; article; conformation; energy; molecular dynamics; priority journal; X ray crystallography; Carbohydrate Conformation; Cellulose; Models, Molecular; Thermodynamics; Trisaccharides |
Año: | 2003
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Volumen: | 338
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Número: | 1
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Página de inicio: | 95
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Página de fin: | 107
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DOI: |
http://dx.doi.org/10.1016/S0008-6215(02)00360-9 |
Título revista: | Carbohydrate Research
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Título revista abreviado: | Carbohydr. Res.
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ISSN: | 00086215
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CODEN: | CRBRA
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CAS: | maltotriose, 1109-28-0; Cellulose, 9004-34-6; maltotriose, 1109-28-0; Trisaccharides
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v338_n1_p95_Stortz |
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Citas:
---------- APA ----------
Stortz, C.A. & Cerezo, A.S.
(2003)
. Depicting the MM3 potential energy surfaces of trisaccharides by single contour maps: Application to β-cellotriose and α-maltotriose. Carbohydrate Research, 338(1), 95-107.
http://dx.doi.org/10.1016/S0008-6215(02)00360-9---------- CHICAGO ----------
Stortz, C.A., Cerezo, A.S.
"Depicting the MM3 potential energy surfaces of trisaccharides by single contour maps: Application to β-cellotriose and α-maltotriose"
. Carbohydrate Research 338, no. 1
(2003) : 95-107.
http://dx.doi.org/10.1016/S0008-6215(02)00360-9---------- MLA ----------
Stortz, C.A., Cerezo, A.S.
"Depicting the MM3 potential energy surfaces of trisaccharides by single contour maps: Application to β-cellotriose and α-maltotriose"
. Carbohydrate Research, vol. 338, no. 1, 2003, pp. 95-107.
http://dx.doi.org/10.1016/S0008-6215(02)00360-9---------- VANCOUVER ----------
Stortz, C.A., Cerezo, A.S. Depicting the MM3 potential energy surfaces of trisaccharides by single contour maps: Application to β-cellotriose and α-maltotriose. Carbohydr. Res. 2003;338(1):95-107.
http://dx.doi.org/10.1016/S0008-6215(02)00360-9