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Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

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The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
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After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
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The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane.
Sec61 protein conducting channel
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Cotranslational Protein Translocation01:20

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Translocation of proteins across membranes is an ancient process that occurs even in bacteria and archaebacteria. In fact, the components of the translocation machinery are still conserved between prokaryotes and eukaryotes.
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Markerless Gene Deletion by Floxed Cassette Allelic Exchange Mutagenesis in Chlamydia trachomatis
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Chlamydia trachomatis and its interaction with the cellular retromer.

Sebastian Banhart1, Laura Rose1, Lukas Aeberhard1

  • 1Division "Sexually Transmitted Bacterial Infections" (FG 19), Robert Koch Institute, Berlin, Germany.

International Journal of Medical Microbiology : IJMM
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Chlamydia trachomatis recruits host cell retromer complex proteins to its inclusion, a key compartment for intracellular growth. This review highlights how the bacterium manipulates cellular trafficking pathways for its survival.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Infectious Diseases

Background:

  • Chlamydia trachomatis is a significant human pathogen that replicates within host cells.
  • The bacterium resides in a specialized vacuole called the inclusion, which is central to its intracellular lifecycle.
  • Emerging research reveals the inclusion acts as a hub for intracellular trafficking, interacting with host cell machinery.

Purpose of the Study:

  • To review recent advancements in understanding Chlamydia trachomatis-host cell interactions.
  • To emphasize the critical role of the host cell's retromer protein complex in Chlamydia infection.

Main Methods:

  • This review synthesizes findings from recent global approaches and molecular studies.
  • Focuses on the analysis of host-pathogen interactions at the cellular level.

Main Results:

  • Chlamydia trachomatis manipulates host cell vesicular trafficking pathways.
  • The bacterial inclusion actively recruits subunits of the retromer protein complex.
  • The retromer complex is integral to the inclusion's function as an intracellular trafficking hub.

Conclusions:

  • Chlamydia trachomatis strategically exploits the host cell's retromer complex.
  • Understanding these interactions provides insights into Chlamydia pathogenesis and potential therapeutic targets.