Stable Positional Cloning of Long Continuous DNA in the Bacillus subtilis Genome Vector

Mitsuhiro Itaya, Kyoko Fujita, Masahiko Ikeuchi, Maki Koizumi, Kenji Tsuge

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Direct cloning of a long continuous genome segment in a Bacillus subtilis genome vector was demonstrated for the first time. Two small DNA fragments had to be installed in the vector prior to cloning. The DNA between these two fragments was cloned via homologous recombination. The efficiency of cloning was estimated using the 3,573-kb genome of a cyanobacterium, Synechocystis sp. PCC 6803. Recombinants were selected using the internal selection system of the Bacillus genome vector or with the antibiotic resistance marker in the cyanobacterial genome. Designated genomic segments as large as 77-kb were cloned by means of a single procedure. Cloning efficiency is affected by the molecular weight of the donor DNA and the size of the DNA to be cloned. The method is suitable for direct target cloning of large-sized DNA.

Original languageEnglish
Pages (from-to)513-519
Number of pages7
JournalJournal of biochemistry
Issue number4
Publication statusPublished - 2003 Oct


  • Genome vector
  • Homologous recombination
  • Positional cloning
  • Transformation

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology


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