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- W2007939552 abstract "β-1,3-d-Glucans have been isolated from fungi as right-handed 61 triple helices. They are categorized by the side chains bound to the main triple helix through β-(1→6)-d-glycosyl linkage. Indeed, since a glucose-based side chain is water soluble, the presence and frequency of glucose-based side chains give rise to significant variation in the physical properties of the glucan family. Curdlan has no side chains and self-assembles to form an water-insoluble triple helical structure, while schizophyllan, which has a 1,6-d-glucose side chain on every third glucose unit along the main chain, is completely water soluble. A thermal fluctuation in the optical rotatory dispersion is observed for the side chain, indicating probable co-operative interaction between the side chains and water molecules. This paper documents molecular dynamics simulations in aqueous solution for three models of the β-1,3-d-glucan series: curdlan (no side chain), schizophyllan (a β-(1→6)-d-glycosyl side-chain at every third position), and a hypothetical triple helix with a side chain at every sixth main-chain glucose unit. A decrease was observed in the helical pitch as the population of the side chain increased. Two types of hydrogen bonding via water molecules, the side chain/main chain and the side chain/side chain hydrogen bonding, play an important role in determination of the triple helix conformation. The formation of a one-dimensional cavity of diameter about 3.5 Å was observed in the schizophyllan triple helix, while curdlan showed no such cavity. The side chain/side chain hydrogen bonding in schizophyllan and the hypothetical β-1,3-d-glucan triple helix could cause the tilt of the main-chain glucose residues to the helix." @default.
- W2007939552 created "2016-06-24" @default.
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- W2007939552 date "2008-02-08" @default.
- W2007939552 modified "2023-10-02" @default.
- W2007939552 title "Molecular Dynamics Studies of Side Chain Effect on the β-1,3-<scp>d</scp>-Glucan Triple Helix in Aqueous Solution" @default.
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- W2007939552 doi "https://doi.org/10.1021/bm700511d" @default.
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