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Host-pathogen reorganisation during host cell entry by Chlamydia trachomatis

Andrea Nans1, Charlotte Ford1, Richard D Hayward1

  • 1Institute of Structural and Molecular Biology, University College London & Birkbeck, Malet Street, London WC1E 7HX, UK.

Microbes and Infection
|August 31, 2015
PubMed

Insights

Chlamydia trachomatis uses a type III secretion system (T3SS) to infect host cells. Recent cryo-electron tomography reveals structural details of bacterial entry and intracellular vacuole formation.

Area of Science:

  • Microbiology
  • Cell Biology
  • Structural Biology

Background:

  • Chlamydia trachomatis is a major global health concern.
  • Bacterial entry into host cells is crucial for infection.
  • Type III secretion systems (T3SS) are key virulence factors.

Purpose of the Study:

  • To review recent cryo-electron tomography findings on Chlamydia trachomatis entry.
  • To elucidate the structural basis of host-pathogen interactions during infection.

Main Methods:

  • Cryo-electron tomography (cryo-ET)
  • Structural analysis of bacterial components
  • Host-pathogen interaction imaging

Main Results:

  • Detailed structure of extracellular Chlamydia elementary bodies (EBs).
  • Supramolecular organization of T3SS on EB surface.
  • Pathogen and host cell architectural changes during internalization and vacuole formation.

Conclusions:

  • Cryo-ET provides high-resolution insights into Chlamydia entry mechanisms.
  • Understanding T3SS-mediated entry can inform strategies against bacterial and viral infections.
Keywords:
ChlamydiaCryo-electron tomographyCytoskeletonEntryType III secretion

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