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Related Experiment Videos

Structure and dynamics in oligomannose-type oligosaccharides.

S W Homans1, A Pastore, R A Dwek

  • 1Department of Biochemistry, University of Oxford, England.

Biochemistry
|October 20, 1987
PubMed
Summary

This study reveals distinct flexibility in oligomannose oligosaccharide structures. Specific glycosidic linkages exhibit greater dynamic properties, influencing overall molecular conformation and structural interpretation.

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Area of Science:

  • Carbohydrate Chemistry
  • Structural Biology
  • Computational Chemistry

Background:

  • Oligomannose oligosaccharides play crucial roles in biological processes.
  • Understanding their tertiary structure and dynamics is essential for elucidating function.
  • Previous studies have provided limited insights into the conformational flexibility of these complex carbohydrates.

Purpose of the Study:

  • To determine the tertiary structure and dynamic properties of a specific oligomannose oligosaccharide.
  • To investigate the conformational flexibility of various glycosidic linkages within the oligosaccharide.
  • To correlate structural dynamics with biological function.

Main Methods:

  • 1H NMR nuclear Overhauser effect (NOE) measurements for structural elucidation.

Related Experiment Videos

  • Molecular orbital calculations to assess potential energy surfaces of glycosidic linkages.
  • Molecular dynamics simulations to model dynamic properties and conformational ensembles.

    • Main Results:

    • Glycosidic linkages in the studied oligomannose exhibited varying degrees of flexibility.
    • Man alpha 1-6Man alpha and Man alpha 1-6Man beta linkages showed a diffuse, shallow potential well, indicating higher flexibility.
    • Molecular dynamics simulations supported NMR data, highlighting flexibility around specific linkages.

    Conclusions:

    • The tertiary structure and dynamic properties of the oligomannose oligosaccharide were elucidated.
    • Differential flexibility of glycosidic linkages significantly impacts the overall molecular conformation.
    • NMR data should be interpreted considering the inherent flexibility of certain linkages for accurate structural understanding.