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- W2898889581 abstract "This paper reports on a complex structural analysis of the potato virus A coat protein using a set of complementary physico-chemical methods. We have demonstrated previously that this protein does not exist as individual subunits in solution and undergoes association into oligomers with subsequent transition to β-conformation. The purpose of the present work was to study the possible mechanisms of this transformation and to search for methods that dissociate protein oligomers. To analyze the low resolution protein structure in solution, small-angle X-ray scattering was used. Stable particles representing clusters of 30 coat protein subunits were present even in an aqueous salt solution with a high ionic strength and pH (pH 10.5; 0.5 M NaCl). The particles did not dissociate in the presence of 10 mM dextran sulfates (15 and 100 kDa). Dissociation in the presence of 5.2 mM sodium dodecyl sulfate results in the formation of the subunit-detergent complexes consisting of 10-12 small particles joined together like beads on a string. Similar effects of sodium dodecyl sulfate were shown for serum albumins (bovine and human). Denaturation of the potato virus A coat protein molecules occurs in the presence of detergent concentrations that are seven times lower than that in albumins (5.2 and 35 mM), which confirms low stability of the potato virus A coat protein. Using spectral methods, preservation of the secondary structure and loss of the tertiary structure of the protein in its complex with sodium dodecyl sulfate have been demonstrated. Possible mechanism for protein particle formation through the interaction between unordered terminal domains and their transformation into β-structures has been suggested." @default.
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- W2898889581 date "2018-01-01" @default.
- W2898889581 modified "2023-10-17" @default.
- W2898889581 title "Структура частиц белка оболочки А вируса картофеля и их диссоциация" @default.
- W2898889581 doi "https://doi.org/10.1134/s0026898418060101" @default.
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