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Soluble macromolecular complexes involving bacterial teichoic acids.

R J Doyle, A N Chatterjee, U N Streips

    Journal of Bacteriology
    |October 1, 1975
    PubMed
    Summary
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    Bacterial teichoic acids form complexes with polysaccharides and proteins in alcohol solutions. This interaction, independent of teichoic acid size, suggests their role in binding hydrophilic membrane molecules.

    Area of Science:

    • Microbiology
    • Biochemistry
    • Polymer Science

    Background:

    • Teichoic acids are crucial cell wall and membrane components in Gram-positive bacteria.
    • Their interactions with other macromolecules are not fully understood, particularly in non-aqueous environments.

    Purpose of the Study:

    • To investigate the complex formation between bacterial teichoic acids and polysaccharides or proteins.
    • To determine the factors influencing these macromolecular associations.

    Main Methods:

    • Studied complex formation in alkyl alcohol solutions (50-97% ethanol).
    • Utilized various polysaccharides (e.g., glycogen) and bovine plasma albumin.
    • Assessed the influence of teichoic acid size, pH, and molecular composition on complexation.

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    Main Results:

    • Teichoic acids formed soluble complexes with diverse polysaccharides and bovine plasma albumin in ethanol.
    • Complexation was independent of teichoic acid size over a threefold molecular weight range.
    • Optimal interaction between glycogen and Bacillus subtilis lipoteichoic acid occurred between pH 4.5 and 8.2.

    Conclusions:

    • Bacterial teichoic acids can act as complexing agents for polysaccharides and proteins in moderate dielectric constant solvents.
    • These findings suggest a potential role for teichoic acids in sequestering hydrophilic molecules within bacterial membranes.