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Cytoplasmic structure and contractility: the solation--contraction coupling hypothesis.

D L Taylor, M Fechheimer

    Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
    |November 4, 1982
    PubMed
    Summary
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    Calcium and proton concentrations regulate cell gelation and contraction. This study refines the solation-contraction coupling hypothesis, explaining amoeboid cell movement and other motile phenomena.

    Area of Science:

    • Cell Biology
    • Biophysics

    Background:

    • Cytoskeletal and contractile proteins are crucial for cell structure and movement.
    • Understanding the regulation of these proteins is key to explaining cellular motility.

    Purpose of the Study:

    • To investigate the role of calcium and protons in modulating cytoskeletal and contractile protein activity.
    • To refine the solation-contraction coupling hypothesis for cellular locomotion.

    Main Methods:

    • Studied protein behavior in intact cells, cell extracts, and purified protein mixtures.
    • Analyzed the distribution of calcium, protons, and actin in amoeboid cells.
    • Quantitatively analyzed contraction rates in stimulated Dictyostelium discoideum extracts.

    Main Results:

    Related Experiment Videos

    • Calcium and proton concentrations were found to modulate both gelation and contraction across all experimental preparations.
    • The distribution of key proteins and ions in intact cells was mapped.
    • The solation-contraction coupling hypothesis was supported by quantitative contraction rate analysis.

    Conclusions:

    • The refined solation-contraction coupling hypothesis provides a plausible explanation for amoeboid locomotion.
    • This hypothesis may be applicable to understanding various motile phenomena in different cell types.