Site-directed (IS30-FljA) transposon mutagenesis system to produce nonflagellated mutants of SalmonellaEnteritidis

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6 Citations (Scopus)


Site-directed integration/mutagenesis systems are used to carry out targeted transpositions on DNA. The well-characterized IS30-element and its transposase have numerous advantages that predestine it to be a good candidate for such applications. In order to generate nonflagellated mutants of Salmonella Enteritidis, a new site-directed mutagenesis system has been developed and applied. The system was constructed based on the assumption that the DNA-binding FljA component of the fusion transposase would bind to its target (the operator of fliC), and as a consequence, insertions could be concentrated in the flagellin operon. The system consists of two components: one expresses the fusion transposase and the other is an integration donor plasmid harbouring the (IS30) 2 reactive structure. The application of this site-directed mutagenesis system on a strain of S. Enteritidis 11 (SE11) resulted in several nonmotile mutants with fliD insertion that could serve as negatively markered vaccine candidates. Analysis of less motile mutants generated by the fusion transposase revealed further hot spot sequences preferred by the fusion construct.

Original languageEnglish
Pages (from-to)52-59
Number of pages8
JournalFEMS microbiology letters
Issue number1
Publication statusPublished - Apr 2011


  • Chimeric protein
  • Flagellin
  • IS30
  • Salmonella
  • Site-directed mutagenesis
  • fli operon

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics

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