Chlamydia trachomatis transformation and allelic exchange mutagenesis

Konrad E. Mueller, Katerina Wolf, Kenneth A. Fields

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Gene inactivation is essential for forward and reverse genetic approaches to establish protein function. Techniques such as insertion or chemical mutagenesis have been developed to mutagenize chlamydiae via targeted or random mutagenesis, respectively. Both of these approaches require transformation of chlamydiae to either introduce insertion elements or complement mutants. We have recently developed a targeted mutagenesis strategy, fluorescence-reported allelic exchange mutagenesis (FRAEM), to delete Chlamydia trachomatis L2 genes. This approach overcomes several barriers for genetically manipulating intracellular bacteria. Perhaps most significantly, FRAEM employs fluorescence reporting to indicate successful transformation and subsequent recombination events. Three protocols are provided that detail methods to construct gene-specific suicide vectors, transform C. trachomatis L2 to select for recombinants, and isolate clonal populations via limiting dilution. In aggregate, these protocols will allow investigators to engineer C. trachomatis L2 strains carrying complete deletions of desired gene(s).

Original languageEnglish
Pages (from-to)11A.3.1-11A.3.15
JournalCurrent Protocols in Microbiology
StatePublished - May 1 2017

Bibliographical note

Publisher Copyright:
© 2017 John Wiley & Sons, Inc.


  • Chlamydia
  • Mutagenesis
  • Transformation

ASJC Scopus subject areas

  • Parasitology
  • Microbiology
  • Virology


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