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Related Experiment Videos

Cloning the BamHI restriction modification system.

J E Brooks1, J S Benner, D F Heiter

  • 1New England Biolabs, Beverly, MA 01915.

Nucleic Acids Research
|February 11, 1989
PubMed
Summary
This summary is machine-generated.

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The BamHI restriction-modification system requires an extra methylase gene copy for stability in E. coli. A second, distinct BamHI methylase gene was also identified during this study.

Area of Science:

  • Molecular Biology
  • Genetics
  • Microbiology

Background:

  • The BamHI restriction-modification system from Bacillus amyloliquefaciens recognizes the GGATCC sequence.
  • Type II restriction enzymes are crucial tools in molecular biology for DNA manipulation.

Purpose of the Study:

  • To clone and characterize the BamHI restriction-modification system in E. coli.
  • To investigate the stability requirements and identify novel components of the BamHI system.

Main Methods:

  • Gene cloning of BamHI methylase and endonuclease into E. coli.
  • Phage restriction assays to assess system activity.
  • DNA hybridization and sequencing to identify homologous genes.

Main Results:

Related Experiment Videos

  • The cloned BamHI system restricts unmodified phage in E. coli.
  • The system requires an additional methylase gene copy on a separate vector for stable maintenance.
  • A second, non-homologous BamHI methylase gene was identified.

Conclusions:

  • The BamHI restriction-modification system exhibits specific stability requirements in E. coli.
  • The identification of a second methylase gene expands our understanding of restriction-modification systems.