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Related Experiment Videos

[Restriction endonuclease Sau 6782].

E E Arutiuniunian, I M Gruber, V M Poliachenko

    Voprosy Meditsinskoi Khimii
    |November 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    This study details the isolation and purification of the Sau 6782 restricting endonuclease, identifying its recognition site as 5'...GATC...3'. This enzyme is an isoshizomer of Sau 3A, offering a new tool for molecular biology.

    Area of Science:

    • Molecular Biology
    • Enzymology
    • Biochemistry

    Context:

    • Restriction enzymes are crucial tools in molecular biology for DNA manipulation.
    • Staphylococcus aureus 6782 is a bacterial strain with potential for producing novel restriction enzymes.
    • Efficient purification methods are essential for obtaining high-quality enzymes for research.

    Purpose:

    • To identify, isolate, and purify the restricting endonuclease Sau 6782.
    • To determine the specific nucleotide sequence recognized by Sau 6782.
    • To optimize the production of Sau 6782 from Staphylococcus aureus 6782.

    Summary:

    • Developed optimal growth conditions for Staphylococcus aureus 6782 to maximize restriction endonuclease yield while minimizing nucleases.
    • Successfully isolated and purified Sau 6782 using affinity chromatography (Blue Sepharose) and cation exchange chromatography (phosphocellulose PII).

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  • The purified enzyme preparation was free of non-specific nucleases, with a yield of 1,000 units per gram of culture cells. Sau 6782 recognizes the 5'...GATC...3' sequence and is an isoshizomer of Sau 3A.

    • Impact:

    • Provides a highly purified restriction enzyme, Sau 6782, for molecular biology applications.
    • Characterization of Sau 6782 expands the repertoire of available restriction enzymes for DNA analysis and engineering.
    • The identification of Sau 6782 as a Sau 3A isoshizomer offers alternative options for specific DNA cleavage.