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Related Experiment Videos

[Changes in DNA supercoiling during differentiation, aging and malignant transformation].

A N Luchnik

    Ontogenez
    |January 1, 1983
    PubMed
    Summary

    Changes in DNA supercoiling correlate with cell proliferation and gene transcription. This suggests supercoiling levels may control gene expression during cell differentiation and malignant transformation.

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    [The connection between DNA topology and acetylation of histones].

    Doklady Akademii nauk·1992

    Area of Science:

    • Molecular Biology
    • Genetics
    • Cell Biology

    Context:

    • DNA supercoiling, a crucial topological modification, influences DNA structure and function.
    • Changes in DNA supercoiling are observed across various cellular processes including differentiation, aging, and transformation.
    • The regulation of gene transcription is intricately linked to the physical state of DNA.

    Purpose:

    • To explore the relationship between DNA supercoiling and cellular states.
    • To investigate the role of DNA topological turns in gene regulation during cell proliferation.
    • To propose a mechanism for coordinated gene switching via DNA supercoiling.

    Summary:

    • Discusses alterations in DNA supercoiling during cell differentiation, aging, and malignant transformation (SV40-induced or spontaneous).
    • Highlights a correlation between cell proliferation levels and the density of titratable superhelical turns in nuclear DNA loops.
    • Suggests that changes in DNA supercoiling density may orchestrate selective gene transcription controlling cell proliferation.

    Impact:

    • Provides insights into the regulatory mechanisms of gene expression.
    • Offers a potential explanation for coordinated gene expression changes during cell cycle control.
    • Contributes to understanding the molecular basis of cell differentiation and cancer development.

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