Hydration of DNA - polyamine complexes
Keywords:
DNA, hydration, putrescine, spermine, complex, gamma irradiation, dielectrometryAbstract
The dielectric properties of water solutions of spermine, putrescine, and complexes of DNA - spermine, DNA - putrescine were studied in the range of millimeter wavelengths. The extent of hydration and probable hydration-active centers were determined for both ligands. It was shown that the influence of complexation on the dielectric properties of solutions is due to variations in the hydration shell of DNA. It was found that gamma irradiation induces the notable changes of both the dielectric parameters and hydration values for the DNA-spermine complex. The hydration effects have been analyzed using the modern models for interaction between DNA and polyamines and the models of the protective action of polyamines.
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