Chaperone and Immunoglobulin-Binding Activities of Skp Protein from Yersinia pseudotuberculosis
| Autor: | V. A. Khomenko, E. V. Sidorin, N. Yu. Kim, Tamara F. Solov'eva |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Protein Folding
Biochemistry law.invention Immunoglobulin Fab Fragments Dynamic light scattering Bacterial Proteins law Escherichia coli Yersinia pseudotuberculosis Bioorganic chemistry Humans Surface plasmon resonance Cloning Molecular S-Phase Kinase-Associated Proteins biology Chemistry General Medicine biology.organism_classification Recombinant Proteins Immunoglobulin Fc Fragments Polyclonal antibodies Chaperone (protein) Immunoglobulin G biology.protein Recombinant DNA Immunoglobulin binding Molecular Chaperones |
| Zdroj: | Biochemistry. Biokhimiia. 85(1) |
| ISSN: | 1608-3040 |
| Popis: | Here, we determined qualitative and quantitative characteristics of the chaperone and immunoglobulin-binding activities of recombinant Skp protein (rSkp) from Yersinia pseudotuberculosis using the methods of dynamic light scattering and surface plasmon resonance. Commercial human polyclonal IgG and Fc and Fab fragments of human IgG were used as substrate proteins. The activity of rSkp strongly depended on the medium pH. The most stable low-molecular-weight complexes with a hydrodynamic radius up to 10 nm were formed by rSkp and protein substrates at acidic pH values. Under these conditions, rSkp exhibited the lowest propensity to self-association and the highest affinity for human IgG and its Fc and Fab fragments, as well as prevented their aggregation most efficiently (i.e., demonstrated the maximal chaperone activity). As the medium pH increased, the affinity of rSkp for IgG and its fragments decreased; rSkp was not able to completely prevent the aggregation of protein substrates, but significantly slowed it down. The obtained information may be of practical interest, since the stability of therapeutic IgG preparations affects their safety and efficacy in medical applications. |
| Databáze: | OpenAIRE |
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