A method to invert dna segments of the bacillus subtilis 168 genome by recombination between two homologous sequences

Tsutomu Toda, Teruo Tanaka, Mitsuhiro Itaya

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We developed a method that allows rapid isolation of mutant Bacillus subtilis 168 carrying an inversion of a specific DNA segment of the genome. Two incomplete neomycin resistance gene cassettes were integrated at both ends of the 1652-kb segment to be inverted. Reciprocal recombination within the 590-bp homologous region of these two cassettes created an intact neomycin resistance gene with concomitant inversion of the 1652-kb segment flanked by the two cassettes. Structure of the mutant genome was verified by analyzing the physical map for rare cutting endonucleases, SfiI NotI, I-Ceul, and I-Scel. The inversion rate was estimated to be 6.9 ± 1.4 x 10 –8/cell/cell division at 37°C. The method should be in principle applicable not only to other regions of the B. subtilis genome but also to other bacterial genomes.

Original languageEnglish
Pages (from-to)773-778
Number of pages6
JournalBioscience, Biotechnology and Biochemistry
Issue number5
Publication statusPublished - 1996 Jan



  • Bacterial genome technology
  • DNA inversion
  • Neomycin
  • Rare-cutting endonuc1eases
  • Rec A

ASJC Scopus subject areas

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry

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