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Sequences spanning the EcoRI substrate site.

D E Garfin, H W Boyer, H M Goodman

    Nucleic Acids Research
    |October 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

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    The EcoRI restriction endonuclease recognizes specific DNA sequences for cleavage. Researchers identified the symmetric DNA sequence -N-G-A-A-T-T-C-N- as the EcoRI site, crucial for its enzymatic activity.

    Area of Science:

    • Molecular Biology
    • Enzymology
    • Genetics

    Background:

    • Restriction endonucleases like EcoRI play a vital role in molecular biology.
    • Understanding substrate specificity is key to their application in DNA manipulation.

    Purpose of the Study:

    • To investigate the substrate recognition mechanism of the EcoRI restriction endonuclease.
    • To determine the specific nucleotide sequences recognized and cleaved by EcoRI.

    Main Methods:

    • Analysis of nucleotide sequences at enzymatic cleavage sites in various DNA molecules.
    • 5'-end labeling and homochromatographic fingerprinting techniques were employed.
    • Determination of specific DNA sequences flanking the EcoRI recognition site.

    Main Results:

    Related Experiment Videos

    • The precise 17-base-pair EcoRI site in simian virus 40 DNA was identified.
    • A 15-base-pair sequence encompassing the EcoRI site in Col El plasmid DNA was determined.
    • The EcoRI site was confirmed to be a symmetric double-stranded sequence: -N-G-A-A-T-T-C-N-.

    Conclusions:

    • EcoRI endonuclease exhibits high specificity for the determined palindromic DNA sequence.
    • This sequence specificity is fundamental to EcoRI's function in DNA restriction.
    • The findings provide insights into enzyme-DNA interactions and sequence recognition.