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DNA binding proteins in chromatin structure and function.

R S Gilmour, A Lang, J R Gu

    Cell Biology International Reports
    |January 1, 1981
    PubMed
    Summary
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    Researchers identified a method to study chromosomal protein binding to globin genes using nitrocellulose paper and labeled DNA. This technique successfully located a specific transcription initiation site for mouse beta globin DNA.

    Area of Science:

    • Molecular Biology
    • Genetics
    • Biochemistry

    Background:

    • Chromosomal proteins play a crucial role in gene regulation.
    • Understanding protein-DNA interactions is essential for deciphering gene expression.
    • Existing methods for studying protein-DNA binding have limitations.

    Purpose of the Study:

    • To develop and assess a technique for identifying chromosomal protein binding sites on cloned globin genes.
    • To demonstrate the utility of this method in characterizing specific transcription initiation sites.

    Main Methods:

    • Proteins were separated using one-dimensional electrophoresis.
    • Separated proteins were transferred to nitrocellulose paper.
    • Nitrocellulose membranes were exposed to nick-translated cloned mouse and human globin DNA probes.

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  • RNA polymerases from mouse Ascites tumor cells were isolated and analyzed.

    • Main Results:

    • The technique effectively determined the binding of chromosomal proteins to cloned globin genes.
    • Specific binding of RNA polymerases to a transcription initiation site on mouse beta globin DNA was demonstrated.
    • This method allows for the precise localization of protein-DNA interactions.

    Conclusions:

    • The developed technique is a valuable tool for studying protein-DNA interactions in gene regulation.
    • It enables the identification of specific binding sites, such as transcription initiation sites.
    • This method has significant implications for understanding gene expression and regulation in mammals.