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Related Experiment Videos

Histone binding to isolated rat liver nuclei.

K S Park, S Kim, W K Paik

    The International Journal of Biochemistry
    |January 1, 1987
    PubMed
    Summary

    Calf thymus histone H3 irreversibly binds to rat liver nuclei, with binding influenced by incubation time and concentration. Most bound histone H3 (94%) localized to the nuclear membrane fraction.

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    Area of Science:

    • Molecular Biology
    • Cell Biology
    • Biochemistry

    Background:

    • Histones are crucial for DNA packaging and nuclear structure.
    • Understanding histone-nucleus interactions is key to cellular processes.

    Purpose of the Study:

    • To investigate the binding characteristics of calf thymus histone H3 to isolated rat liver nuclei.
    • To determine the factors affecting histone H3 nuclear binding and localization.

    Main Methods:

    • Incubation of isolated rat liver nuclei with calf thymus histone H3.
    • Varying incubation period, histone H3 concentration, and nuclear concentration.
    • Assessing binding saturation and inhibition by other histones.
    • Fractionation of nuclei to determine the location of bound histone H3.

    Main Results:

    • Histone H3 exhibited irreversible binding to rat liver nuclei.
    • Binding rate and extent depended on incubation time and concentrations of histone H3 and nuclei.
    • Binding was independent of temperature and showed saturation kinetics.
    • Simultaneous presence of other histones inhibited H3 binding.
    • Approximately 94% of bound histone H3 was found in the nuclear membrane fraction.

    Conclusions:

    • Calf thymus histone H3 binds specifically and irreversibly to rat liver nuclei.
    • Nuclear membrane is a primary association site for histone H3.
    • Binding is a regulated process influenced by concentration and competing histones.

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