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Sökning: WFRF:(Nahmany Avi)

  • Resultat 1-2 av 2
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1.
  • Nyholm, Per-Georg, 1958, et al. (författare)
  • The use of a genetic algorithm search for molecular mechanics (MM3)-based conformational analysis of oligosaccharides.
  • 2005
  • Ingår i: Carbohydrate Research. - : Elsevier BV. - 0008-6215 .- 1873-426X. ; 340:5, s. 1059-1064
  • Tidskriftsartikel (refereegranskat)abstract
    • We have implemented a system called glygal that can perform conformational searches on oligosaccharides using several different genetic algorithm (GA) search methods. The searches are performed in the torsion angle conformational space, considering both the primary glycosidic linkages as well as the pendant groups (C-5–C-6 and hydroxyl groups) where energy calculations are performed using the MM3(96) force field. The system includes a graphical user interface for setting calculation parameters and incorporates a 3D molecular viewer. The system was tested using dozens of structures and we present two case studies for two previously investigated O-specific oligosaccharides of the Shigella dysenteriae type 2 and 4. The results obtained using glygal show a significant reduction in the number of structures that need to be sampled in order to find the best conformation, as compared to filtered systematic search.
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2.
  • Strino, Francesco, 1980, et al. (författare)
  • Conformation of the exopolysaccharide of Burkholderia cepacia predicted with molecular mechanics (MM3) using genetic algorithm search.
  • 2005
  • Ingår i: Carbohydrate Research. - : Elsevier BV. - 0008-6215 .- 1873-426X. ; 340:5, s. 1019-1024
  • Tidskriftsartikel (refereegranskat)abstract
    • We present a computational conformational analysis of the exopolysaccharide of Burkholderia cepacia, which is believed to play a role in colonization and persistence of B. cepacia in the lungs of cystic fibrosis patients. The repeating unit of the exopolysaccharide is a heptasaccharide with three branches, which cause significant steric restraints. Conformational searches using glygal, an in-house developed software using genetic algorithm search methods, were performed on fragments as well as on the complete repeating unit with wrap-over residues. The force field used for the calculations was MM3(96). The search showed four favored conformations for an isolated repeating unit. However, for a sequence of several repeating units, the calculations indicate a single, well-defined linear conformation.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
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refereegranskat (2)
Författare/redaktör
Kemp, Graham, 1965 (2)
Nyholm, Per-Georg, 1 ... (2)
Strino, Francesco, 1 ... (2)
Nahmany, Avi (2)
Rosen, Jimmy (2)
Sá-correia, Isabel (1)
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Göteborgs universitet (2)
Chalmers tekniska högskola (2)
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Engelska (2)
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Medicin och hälsovetenskap (2)
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2005 (2)

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