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A simple procedure for cross-linking complementary oligonucleotides.

B C Chu1, L E Orgel

  • 1Salk Institute for Biological Studies, San Diego, CA 92138.

DNA and Cell Biology
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study introduces a straightforward method for cross-linking complementary oligonucleotides using trans-platinum(II)diammine dichloride. This technique effectively blocks DNA synthesis, yielding truncated products and offering a novel tool for molecular biology research.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Chemical Biology

Background:

  • Oligonucleotide cross-linking is crucial for various molecular biology applications.
  • Existing methods often require chemical modification of the oligonucleotides.
  • Developing efficient, modification-free cross-linking strategies is essential.

Purpose of the Study:

  • To describe a simple and efficient procedure for cross-linking complementary oligonucleotides.
  • To investigate the efficacy of trans-platinum(II)diammine dichloride in oligonucleotide cross-linking.
  • To assess the impact of cross-linking on DNA synthesis.

Main Methods:

  • Conversion of one oligonucleotide to its 5'-phosphorothioate derivative using polynucleotide kinase.
  • Incubation of the modified oligonucleotide with its complement in the presence of 1 microM trans-platinum(II)diammine dichloride.
Keywords:
Non-programmatic

Related Experiment Videos

  • Analysis of cross-linking efficiency and impact on DNA synthesis using Klenow fragment of Escherichia coli DNA polymerase I.

    • Main Results:

    • Achieved 40-50% cross-linking after overnight incubation with trans-platinum(II)diammine dichloride.
    • DNA synthesis was blocked at the cross-linked site, producing truncated DNA products.
    • Trans isomer was more efficient than cis-platinum(II)diammine dichloride and potassium platinous chloride.

    Conclusions:

    • A simple, efficient, and modification-free method for oligonucleotide cross-linking has been established.
    • Trans-platinum(II)diammine dichloride is an effective reagent for creating oligonucleotide cross-links.
    • The generated cross-links serve as effective blocks for DNA polymerase activity, leading to truncated DNA synthesis.