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Dynamin-mediated lipid acquisition is essential for Chlamydia trachomatis development

Rajendra Kumar Gurumurthy1, Cindrilla Chumduri, Alexander Karlas

  • 1Department of Molecular Biology, Max Planck Institute for Infection Biology, 10117, Berlin, Germany.

Molecular Microbiology
|August 14, 2014
PubMed

Insights

Dynamin, a host GTPase, is crucial for Chlamydia trachomatis development by facilitating lipid acquisition into inclusions. This study reveals dynamin

Area of Science:

  • Microbiology
  • Cell Biology
  • Infectious Diseases

Background:

  • Chlamydia trachomatis is a significant human pathogen.
  • Host factors influencing Chlamydia trachomatis infectivity are actively researched.
  • The precise role of dynamin in Chlamydia trachomatis infection was previously unclear.

Purpose of the Study:

  • To elucidate the function of dynamin in the Chlamydia trachomatis infection cycle.
  • To investigate dynamin's role in Chlamydia trachomatis inclusion dynamics and lipid acquisition.
  • To determine the relationship between Golgi fragmentation, cell cycle, and dynamin-dependent lipid transport.

Main Methods:

  • Loss-of-function screen using lentivirally transduced shRNAs.
  • Analysis of Chlamydia trachomatis inclusion fusion and internalization.
  • Assessment of lipid transport into inclusions and bacterial differentiation.
  • Microscopy to observe Golgi apparatus fragmentation and cell cycle correlation.

Main Results:

  • Knockdown of dynamin significantly reduced Chlamydia trachomatis infectivity.
  • Dynamin is essential for homotypic fusion of Chlamydia trachomatis inclusions.
  • Dynamin activity is required for lipid transport into inclusions and bacterial re-differentiation.
  • Golgi fragmentation was observed but dispensable for dynamin-mediated lipid acquisition.

Conclusions:

  • Dynamin plays a critical role in host-derived lipid acquisition for Chlamydia trachomatis development.
  • Dynamin is essential for Chlamydia trachomatis inclusion fusion and lipid transport, impacting bacterial development.
  • Golgi fragmentation is not essential for dynamin-mediated lipid acquisition during Chlamydia trachomatis infection.

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