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Related Experiment Videos

Yeast chromatin is uniformly digested by DNase-I.

D Lohr, L Hereford

    Proceedings of the National Academy of Sciences of the United States of America
    |September 1, 1979
    PubMed
    Summary

    Transcribed yeast chromatin is equally sensitive to DNase I digestion as total yeast chromatin. This suggests the entire yeast genome exists in a restricted chromatin state, unlike in higher eukaryotes.

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    Area of Science:

    • Molecular Biology
    • Genetics
    • Biochemistry

    Background:

    • Chromatin structure plays a crucial role in gene regulation.
    • Higher eukaryotes exhibit differential DNase I sensitivity between transcribed and non-transcribed chromatin.
    • Understanding yeast chromatin structure provides insights into eukaryotic genome organization.

    Purpose of the Study:

    • To investigate the DNase I sensitivity of transcribed yeast chromatin.
    • To compare the accessibility of transcribed yeast chromatin to that of total yeast chromatin.
    • To infer the global chromatin state in yeast.

    Main Methods:

    • DNase I digestion assays were performed on yeast chromatin.
    • Quantification of DNA fragments after digestion was used to assess sensitivity.

    Main Results:

    • Transcribed yeast chromatin demonstrated equal DNase I sensitivity compared to total yeast chromatin.
    • This contrasts with the findings in higher eukaryotes where transcribed chromatin is more sensitive.

    Conclusions:

    • The entire yeast genome appears to exist in a chromatin conformation that is generally accessible.
    • Yeast chromatin structure may represent a uniformly restricted state compared to the heterogeneous states found in higher eukaryotes.

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