Hauptseite > Publikationsdatenbank > The Influences of Sulphation, Salt Type, and Salt Concentration on the Structural Heterogeneity of Glycosaminoglycans > print

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024 7 _ |a 10.3390/ijms222111529
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024 7 _ |a 1661-6596
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024 7 _ |a 2128/30323
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082 _ _ |a 540
100 1 _ |a Samantray, Suman
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245 _ _ |a The Influences of Sulphation, Salt Type, and Salt Concentration on the Structural Heterogeneity of Glycosaminoglycans
260 _ _ |a Basel
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520 _ _ |a The increasing recognition of the biochemical importance of glycosaminoglycans (GAGs) has in recent times made them the center of attention of recent research investigations. It became evident that subtle conformational factors play an important role in determining the relationship between the chemical composition of GAGs and their activity. Therefore, a thorough understanding of their structural flexibility is needed, which is addressed in this work by means of all-atom molecular dynamics (MD) simulations. Four major GAGs with different substitution patterns, namely hyaluronic acid as unsulphated GAG, heparan-6-sulphate, chondroitin-4-sulphate, and chondroitin-6-sulphate, were investigated to elucidate the influence of sulphation on the dynamical features of GAGs. Moreover, the effects of increasing NaCl and KCl concentrations were studied as well. Different structural parameters were determined from the MD simulations, in combination with a presentation of the free energy landscape of the GAG conformations, which allowed us to unravel the conformational fingerprints unique to each GAG. The largest effects on the GAG structures were found for sulphation at position 6, as well as binding of the metal ions in the absence of chloride ions to the carboxylate and sulphate groups, which both increase the GAG conformational flexibility.
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700 1 _ |a Olubiyi, Olujide O.
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700 1 _ |a Strodel, Birgit
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773 _ _ |a 10.3390/ijms222111529
|g Vol. 22, no. 21, p. 11529 -
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