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Related Experiment Videos

Human colostral IgA interacting with staphylococcal protein A.

A Grov

    Acta Pathologica Et Microbiologica Scandinavica. Section C, Immunology
    |February 1, 1976
    PubMed
    Summary

    Human colostral immunoglobulin A (IgA) fractions were separated using protein A. The study found that protein A interacts with IgA via its Fc-region, not through direct precipitation.

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    Area of Science:

    • Immunology
    • Biochemistry

    Background:

    • Human colostral immunoglobulin A (IgA) is crucial for mucosal immunity.
    • Protein A is a cell wall protein from Staphylococcus aureus with known affinity for immunoglobulins.

    Purpose of the Study:

    • To investigate the interaction between human colostral IgA and protein A.
    • To determine the specific region of IgA involved in protein A binding.

    Main Methods:

    • Fractionation of human colostral IgA using a Sepharose-protein A affinity column.
    • Analysis of protein A-reactive and non-reactive IgA fractions.

    Main Results:

    • Human colostral IgA was successfully divided into protein A-reactive and non-reactive fractions.
    • The reactive fractions demonstrated co-precipitation with protein A, indicating interaction.
    • Evidence suggests the Fc-region of IgA mediates the interaction with protein A.

    Conclusions:

    • Protein A binds to human colostral IgA.
    • The binding occurs through the Fc-region of IgA, not via direct precipitation.

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