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Related Experiment Videos

Bacterial artificial chromosome libraries for mouse sequencing and functional analysis.

K Osoegawa1, M Tateno, P Y Woon

  • 1Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, New York 14263 USA.

Genome Research
|January 25, 2000
PubMed
Summary

New bacterial artificial chromosome (BAC) and P1-derived artificial chromosome (PAC) libraries offer high-quality murine genome representation. These libraries exhibit low chimerism and rearrangements, making them valuable for genome mapping and sequencing research.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Bacterial artificial chromosome (BAC) and P1-derived artificial chromosome (PAC) libraries are essential tools for genome research.
  • High-quality libraries with extensive genome representation are crucial for accurate mapping and sequencing.
  • Previous efforts may have limitations in terms of representation or structural integrity.

Purpose of the Study:

  • To construct and characterize novel BAC and PAC libraries for the murine genome.
  • To ensure high-fidelity representation of the mouse genome for downstream applications.
  • To assess the structural integrity and usefulness of these libraries for genome mapping and sequencing.

Main Methods:

  • Construction of BAC and PAC libraries using restriction enzyme digestion of genomic DNA.

Related Experiment Videos

  • Preparation of a large-insert PAC library in a bacterial/mammalian shuttle vector for functional studies.
  • Screening libraries with probes to assess genome representation and clone contiguity.
  • Analysis of end sequences and mapping of markers to determine clone chimerism and rearrangements.

    • Main Results:

    • Development of BAC and PAC libraries providing a combined 33-fold representation of the murine genome.
    • Average insert sizes ranged from 130 kb to 200 kb, with each library offering over 10-fold genome coverage.
    • Extensive analysis of 113 clones revealed a low chimerism rate (approx. 1%) and minimal detected rearrangements.
    • 71 out of 113 clones were confirmed non-chimeric, demonstrating high structural fidelity.

    Conclusions:

    • The constructed BAC and PAC libraries offer robust and reliable representation of the murine genome.
    • The low rate of chimerism and rearrangements indicates the high quality and utility of these libraries for genome research.
    • These libraries are well-suited for advanced applications such as genome mapping, sequencing, and functional gene studies.