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Related Experiment Videos

Selection of restriction endonucleases using artificial cells.

Yu Zheng1, Richard J Roberts

  • 1New England BioLabs, Inc., 240 County Road, Ipswich, MA 01938, USA. zhengy@neb.com

Nucleic Acids Research
|June 15, 2007
PubMed
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This study introduces an artificial cell system for discovering restriction endonucleases. This novel method efficiently enriches endonuclease genes from complex DNA libraries and genomic sources.

Area of Science:

  • Molecular Biology
  • Biotechnology
  • Enzymology

Background:

  • Restriction endonucleases are crucial tools in molecular biology.
  • Identifying novel endonucleases from diverse sources remains challenging.
  • Existing cloning methods can be inefficient for discovering new enzymes.

Purpose of the Study:

  • To develop a novel in vitro system for the selection of restriction endonuclease genes.
  • To demonstrate the efficiency and sensitivity of the artificial cell-based selection system.
  • To validate the system by selecting known and novel endonuclease genes from genomic DNA.

Main Methods:

  • Utilizing artificial cells generated via in vitro compartmentalization in water-in-oil emulsions.
  • Expressing endonuclease genes within compartments, leading to self-cleavage of DNA templates.

Related Experiment Videos

  • Employing adaptor ligation and adaptor-specific PCR for enrichment of active endonuclease genes.
  • Applying the system to both model libraries and direct selection from bacterial genomic DNA.

    • Main Results:

    • Achieved over 100-fold enrichment of endonuclease genes in a single selection round.
    • Demonstrated sensitivity to enrich active genes from a library complexity of 1:10^5 in 2-3 rounds.
    • Successfully selected the known PstI gene and a novel TspMI gene from bacterial genomic DNA.

    Conclusions:

    • The artificial cell system provides a powerful and efficient tool for cloning restriction endonuclease genes.
    • This method offers a unique approach for discovering novel enzymes with potential biotechnological applications.
    • The system's sensitivity and efficiency open avenues for broader applications in molecular biology and genomics.