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Related Experiment Videos

Sumo15A: a lambda phasmid that permits easy selection for and against cloned inserts.

S Kurachi1, N Baldori, D M Kurnit

  • 1Department of Pediatrics, Howard Hughes Medical Institute, University of Michigan Medical Center, Ann Arbor 48109-0650.

Gene
|December 21, 1989
PubMed
Summary

We developed Sumo15A, a phasmid vector for screening DNA libraries using homologous recombination. This system enables efficient selection of desired DNA sequences in Escherichia coli, facilitating genetic research.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Recombinant DNA Technology

Background:

  • Recombination-based screening is crucial for analyzing recombinant DNA libraries.
  • Existing methods may lack efficiency or specificity in selection processes.

Purpose of the Study:

  • To construct and validate the Sumo15A phasmid vector for enhanced recombination-based screening.
  • To enable rapid and efficient selection of homologous DNA integrations and excisions.

Main Methods:

  • Construction of the Sumo15A phasmid vector.
  • Utilizing the supF gene as a selection tool.
  • Employing lambda phage red gene-mediated homologous recombination.
  • Leveraging a specialized Escherichia coli host (strain DK37) for counterselection.

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Main Results:

  • Sumo15A facilitates homology-mediated integration and excision of DNA inserts.
  • Efficient selection for supF expression is achieved through lambda phage red recombination.
  • Counterselection against supF is effective in E. coli strain DK37, allowing for precise screening.

Conclusions:

  • The Sumo15A phasmid vector provides a robust system for screening recombinant DNA libraries.
  • This method allows for the selection of specific transcribed sequences from chromosomes of interest.
  • The developed scheme enhances the efficiency and accuracy of DNA library screening.