When sugars get wet. A comprehensive study of the behavior of water on the surface of oligosaccharides

Sai Kumar Ramadugu, Ying-Hua Chung, Junchao Xia, Claudio J. Margulis

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

In this article, we characterize the behavior of water on the surface of a diverse group of carbohydrates and attempt to determine the role of saccharide size, linkage, and branching as well as secondary structure on the dynamics and structure of water at the surface. In order to better understand the similarities and differences in the behavior of the solvent on the carbohydrate surface, we explore residence times, rotational correlation functions, local solvent occupancy numbers, and diffusivities. We find that due to the differences in secondary structure water residence times are longer and translational and rotational dynamics are retarded when in contact with wide helices and branched sugars. In the case of extended helices and smaller oligosaccharides, water dynamics is faster and less hindered. This indicates that branching, the type of linkage between monomers, and the anomeric configuration all play a major role in determining the structure and dynamics of water on the surface of carbohydrates.

Original languageEnglish (US)
Pages (from-to)11003-11015
Number of pages13
JournalJournal of Physical Chemistry B
Volume113
Issue number31
DOIs
StatePublished - Aug 6 2009

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