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Related Experiment Videos

Construction of gene targeting vectors from lambda KOS genomic libraries.

S Wattler1, M Kelly, M Nehls

  • 1Lexicon Genetics Incorporated, The Woodlands, TX, USA.

Biotechniques
|June 22, 1999
PubMed
Summary

Researchers developed a new tool, the lambda knockout shuttle (lambda KOS) library, for rapid gene targeting vector construction. This system simplifies creating conditional gene targeting vectors in just 3-4 weeks.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Gene Targeting

Background:

  • Gene targeting is crucial for studying gene function but can be time-consuming.
  • Developing efficient methods for constructing gene targeting vectors is essential for research.
  • Existing methods may have limitations in speed and flexibility.

Purpose of the Study:

  • To introduce a novel murine genomic library and vector system, lambda knockout shuttle (lambda KOS), for rapid gene targeting vector construction.
  • To streamline the process of creating replacement-type and conditional gene targeting vectors.
  • To reduce the time required for generating gene targeting vectors from genomic libraries.

Main Methods:

  • Construction of a highly redundant murine genomic library in the lambda KOS phage.

Related Experiment Videos

  • Arraying the library into 96-well subpools for PCR-based clone recovery.
  • Utilizing CRE-mediated conversion to high-copy number pKOS plasmids with negative-selection cassettes.
  • Exploiting yeast homologous recombination for restriction site-independent vector construction.

    • Main Results:

    • The lambda KOS library comprises 94 subpools with an average of 40,000 independent genomic clones each.
    • The system enables efficient recovery of genomic clones via PCR.
    • CRE-mediated conversion facilitates the generation of plasmids with genomic inserts flanked by selection cassettes.
    • The lambda KOS system simplifies the construction of replacement-type gene targeting vectors.
    • Procedures allow for the generation of simple and sophisticated conditional gene targeting vectors within 3-4 weeks.

    Conclusions:

    • The lambda KOS vector system significantly accelerates the construction of gene targeting vectors.
    • This method simplifies vector generation, making it accessible and efficient for researchers.
    • The developed system offers a rapid and versatile approach for creating conditional gene targeting strategies.