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Intermolecular interactions in solutions of serum albumin

Cell and Tissue Biology volume 11, pages 9–15 (2017)Cite this article

Abstract

The mechanisms of intermolecular protein complex formation were studied by the example of monomers, oligomers and aggregates of bovine serum albumin (BSA) depending on the protein concentration, pH and urea concentration. Using dynamic light scattering (DLS), analytical ultracentrifugation (AUC) and PAG electrophoresis we have shown the existence of dynamic equilibrium between monomers and aggregates in BSA solution. Decreasing pH of the solution (4.0–1.0) resulted in increasing sizes of the aggregates. In the solutions with low urea concentrations (below 2 M) the sizes of aggregates decreased, while higher urea concentrations (2–8 M) induced formation of larger aggregates due to the unfolding of the protein.

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Abbreviations

AUC:

analytical ultracentrifugation

BSA:

bovine serum albumin

SA:

serum albumin

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Authors and Affiliations

  1. St. Petersburg State University, St. Petersburg, 199034, Russia

    A. M. Polyanichko, N. V. Mikhailov, N. M. Romanov & Yu. G. Baranova

  2. Institute of Cytology, Russian Academy of Sciences, St. Petersburg, 194064, Russia

    A. M. Polyanichko & E. V. Chikhirzhina

Authors
  1. A. M. Polyanichko
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  2. N. V. Mikhailov
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  3. N. M. Romanov
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  4. Yu. G. Baranova
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  5. E. V. Chikhirzhina
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Correspondence to A. M. Polyanichko.

Additional information

Original Russian Text © A.M. Polyanichko, N.V. Mikhailov, N.M. Romanov, Yu.G. Baranova, E.V. Chikhirzhina, 2016, published in Tsitologiya, 2016, Vol. 58, No. 9, pp. 707–713.

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Polyanichko, A.M., Mikhailov, N.V., Romanov, N.M. et al. Intermolecular interactions in solutions of serum albumin. Cell Tiss. Biol. 11, 9–15 (2017). https://doi.org/10.1134/S1990519X17010084

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  • DOI: https://doi.org/10.1134/S1990519X17010084

Keywords

  • serum albumin
  • analytical ultracentrifugation
  • dynamic light scattering