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Sialyldisaccharide conformations: a molecular dynamics perspective

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Abstract

Sialyldisaccharides are significant terminal components of glycoconjugates and their negative charge and conformation are extensively utilized in molecular recognition processes. The conformation and flexibility of four biologically important sialyldisaccharides [Neu5Acα(2-3)Gal, Neu5Acα(2-6)Gal, Neu5Acα(2-8)Neu5Ac and Neu5Acα(2-9)Neu5Ac] are studied using Molecular Dynamics simulations of 20 ns duration to deduce the conformational preferences of the sialyldisaccharides and the interactions which stabilize the conformations. This study clearly describes the possible conformational models of sialyldisaccharides deduced from 20 ns Molecular Dynamics simulations and our results confirm the role of water in the structural stabilization of sialyldisaccharides. An extensive analysis on the sialyldisaccharide structures available in PDB also confirms the conformational regions found by experiments are detected in MD simulations of 20 ns duration. The three dimensional structural coordinates for all the MD derived sialyldisaccharide conformations are deposited in the 3DSDSCAR database and these conformational models will be useful for glycobiologists and biotechnologists to understand the biological functions of sialic acid containing glycoconjugates.

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Acknowledgments

JFAS and TRKP acknowledge the Junior Research Fellowship from the Department of Science and Technology (SR/S0/BB-53/2003) and the Department of Biotechnology (BT/PR4251/BID/07/068/2003). JFAS, TRKP and KV acknowledge the use of Bioinformatics Centre in the Department of Physics, Manonmaniam Sundaranar University (BT/BI/25/001/2006) funded by DBT.

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Authors and Affiliations

  1. Department of Physics, Manonmaniam Sundaranar University, Tirunelveli, Tamilnadu, 627 012, India

    Jeyasigamani F. A. Selvin, Thanu R. K. Priyadarzini & Kasinadar Veluraja

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  1. Jeyasigamani F. A. Selvin
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  2. Thanu R. K. Priyadarzini
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  3. Kasinadar Veluraja
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Correspondence to Kasinadar Veluraja.

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Selvin, J.F.A., Priyadarzini, T.R.K. & Veluraja, K. Sialyldisaccharide conformations: a molecular dynamics perspective. J Comput Aided Mol Des 26, 375–385 (2012). https://doi.org/10.1007/s10822-012-9563-0

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  • DOI: https://doi.org/10.1007/s10822-012-9563-0

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