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Nucleotide sequencing double-stranded plasmids with primers selected from a nonamer library

J L Slightom1, J H Bock, D R Siemieniak

  • 1Molecular Biology Unit 7242-267-510, Upjohn Company, Kalamazoo, MI 49007.

Biotechniques
|September 1, 1994
PubMed
Summary

A nonamer library significantly aids DNA sequencing projects by reducing custom primer needs. This method successfully sequenced plasmid inserts, demonstrating its efficiency for high-throughput applications.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Biotechnology

Background:

  • DNA sequencing is crucial for genetic research and diagnostics.
  • Traditional methods often require numerous custom primers, increasing costs and time.
  • Developing efficient primer selection strategies is key for high-throughput sequencing.

Purpose of the Study:

  • To evaluate the efficacy of a nonamer library for DNA sequencing primer selection.
  • To determine the success rate and coverage achieved using nonamer-primed sequencing.
  • To assess the potential of nonamer libraries in reducing the need for custom primers in sequencing projects.

Main Methods:

  • Nonamer primers were selected from a 2391-member library based on unique sequence matches.
  • Sequencing was performed on two plasmid subclones using a modified T7 polymerase procedure.

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  • Plasmid insert sequences were mapped against the nonamer library to identify potential primers.

    • Main Results:

    • Approximately 60% of nonamer-primed reactions were successful.
    • Single-stranded DNA coverage reached about 90% of each plasmid insert.
    • The nonamer library effectively identified primers, reducing the need for custom synthesis.

    Conclusions:

    • A nonamer library, even with a limited number of members, can substantially facilitate DNA sequencing projects.
    • This approach reduces the requirement for custom primers, offering a more efficient alternative.
    • The findings support the development of high-throughput sequencing protocols utilizing nonamer libraries.