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Related Experiment Videos

Plasmids for recombination-based screening.

G D Stewart1, M A Hauser, H Kang

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

Gene
|September 30, 1991
PubMed
Summary
This summary is machine-generated.

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Researchers developed new plasmids, pi G4 and pMAD1, for efficient recombination-based screening and DNA sequencing. These tools enable background-free transformation and screening of cDNA libraries, improving molecular biology workflows.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Recombination-based screening is crucial for molecular biology applications.
  • Existing plasmids may have limitations in screening common cDNA libraries and integrating DNA sequencing.
  • High-copy-number plasmids are valuable tools in genetic engineering.

Purpose of the Study:

  • To develop novel plasmids facilitating recombination-based screening and rapid DNA sequencing.
  • To create tools for efficient screening of cDNA libraries, particularly those with ColE1 sequences.
  • To engineer plasmids with antibiotic resistance, multiple cloning sites, and the supF genetic marker.

Main Methods:

  • Construction of ColE1-based plasmid pi G4 with chloramphenicol resistance and a polylinker.

Related Experiment Videos

  • Insertion of the supF selectable marker into 20 high-copy-number pUC-derived NoC plasmids.
  • Development of the R6K-based pMAD1 plasmid, a 4.4-kb high-copy-number plasmid with a polylinker and supF marker, designed for non-homologous recombination with ColE1 sequences.

    • Main Results:

    • The constructed plasmids enable background-free transformation using a supF plasmid with an antibiotic-resistance marker.
    • Simultaneous performance of recombination-based assays and DNA sequencing is facilitated.
    • Screening of bacteriophage cDNA libraries containing ColE1 sequences is enabled through recombination with non-homologous supF plasmids.

    Conclusions:

    • The developed plasmids, pi G4 and pMAD1, offer enhanced capabilities for recombination-based screening and DNA sequencing.
    • These tools provide a versatile platform for molecular cloning and genetic analysis.
    • The non-homologous nature of pMAD1 to ColE1 expands its utility for screening diverse cDNA libraries.