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Efficient site directed in vitro mutagenesis using ampicillin selection.

M K Lewis1, D V Thompson

  • 1Promega Corporation, Madison, WI 53711.

Nucleic Acids Research
|June 25, 1990
PubMed
Summary
This summary is machine-generated.

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A new plasmid vector, pSELECT-1, enables highly efficient site-directed in vitro mutagenesis using single-stranded DNA and two primers. This method leverages ampicillin resistance selection for effective mutant isolation.

Area of Science:

  • Molecular Biology
  • Genetic Engineering
  • Biotechnology

Background:

  • Site-directed mutagenesis is crucial for genetic research and protein engineering.
  • Existing methods can be inefficient or complex.

Purpose of the Study:

  • To describe a novel plasmid vector, pSELECT-1, for highly efficient site-directed in vitro mutagenesis.
  • To present a mutagenesis method utilizing single-stranded DNA and a dual-primer approach.

Main Methods:

  • Construction and application of the pSELECT-1 plasmid vector.
  • Employing single-stranded DNA with a mutagenic primer and a correction primer.
  • Utilizing T4 DNA polymerase and T4 DNA ligase for primer linkage.
  • Selection against non-mutant strands via ampicillin resistance.

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Main Results:

  • The pSELECT-1 vector facilitates highly efficient site-directed in vitro mutagenesis.
  • Mutagenesis efficiencies ranging from 60% to 90% were achieved in tests.
  • The method effectively selects for desired mutations by restoring ampicillin resistance.

Conclusions:

  • The pSELECT-1 vector represents a significant advancement for efficient in vitro mutagenesis.
  • This novel system simplifies and enhances the process of introducing specific DNA mutations.