RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Fundamentals and Applications of Neutron Diffraction
(Applications 3)Neutron Crystal Structure Analysis of Hydrogen-bonding Networks and Fluctuation of Water Molecules in Nucleotide Hydrates
Yoko SUGAWARA
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JOURNALS OPEN ACCESS

2010 Volume 59 Issue 2 Pages 135-143

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Abstract

Nucleosides and nucleotides, which are the basic components of nucleic acids, crystallize as hydrates. Numbers of crystal water molecules are a function of relative humidity surrounding crystals. Besides, phase transitions occur around 200K, which couple with the ordering of crystal water molecules. Neutron diffraction analysis on the humidity- and temperature-induced phase transitions of nucleotide hydrates was carried out. Neutron crystal structures showed that there were hydrogen-bonding networks common to nucleotide hydrates, switching of long-ranged hydrogen-bonding networks, and fluctuating crystal water molecules anchoring through hydrogen bonds.

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© 2010 by Japan Radioisotope Association
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