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Intra-ChIP: studying gene regulation in an intracellular pathogen.

  • Author(s): Hanson, Brett R;
  • Tan, Ming
  • et al.

Intracellular bacteria that reside within a host cell use a variety of strategies to exploit this unique niche. While these organisms are technically challenging to study in the context of an infected host cell, recent advances have led to an improved understanding of how the intracellular environment impacts bacterial gene expression. We recently demonstrated that chromatin immunoprecipitation (ChIP) can be used to quantify transcription factor binding in the obligate intracellular pathogen Chlamydia trachomatis within infected cells. Furthermore, we showed it was possible to experimentally modulate transcription factor binding while simultaneously measuring changes in transcription. Here we discuss these findings as well as other recent work that has used ChIP to study intracellular pathogens within infected cells. We also discuss technical considerations associated with this approach and its possible future applications.

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