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Dielectric spectra broadening as a signature for dipole-matrix interactions. V. Water in protein solutions

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dc.contributor.author Latypova L.
dc.contributor.author Puzenko A.
dc.contributor.author Levy E.
dc.contributor.author Feldman Y.
dc.date.accessioned 2021-02-24T20:32:45Z
dc.date.available 2021-02-24T20:32:45Z
dc.date.issued 2020
dc.identifier.issn 0021-9606
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/160809
dc.description.abstract © 2020 Author(s). In this paper, the fifth of our series focused on the dielectric spectrum symmetrical broadening of water, we consider the solutions of methemoglobin (MetHb) in pure water and in phosphate-buffered saline (PBS). The universal character of the Cole-Cole dielectric response, which reflects the interaction of water dipoles with solute molecules, was described in Paper I [E. Levy et al., J. Chem. Phys. 136, 114502 (2012)]. It enables the interpretation of the dielectric data of MetHb solutions in a unified manner using the previously developed 3D trajectory method driven by the protein concentration. It was shown that protein hydration is determined by the interaction of water dipoles with the charges and dipoles located on the rough surfaces of the protein macromolecules. In the case of the buffered solution, the transition from a dipole-charged to a dipole-dipole interaction with the protein concentration is observed {see Paper III [A. Puzenko et al., J. Chem. Phys. 137, 194502 (2012)]}. A new approach is proposed for evaluating the amount of hydration water molecules bounded to the macromolecule that takes into account the number of positive and negative charges on the protein's surface. In the case of the MetHb solution in PBS, the hydration of the solvent ions and their interaction with charges on the protein's surface are also taken into consideration. The difference in hydration between the two solutions of MetHb is discussed.
dc.relation.ispartofseries Journal of Chemical Physics
dc.title Dielectric spectra broadening as a signature for dipole-matrix interactions. V. Water in protein solutions
dc.type Article
dc.relation.ispartofseries-issue 4
dc.relation.ispartofseries-volume 153
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00219606-2020-153-4-SID85089026670


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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