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Analysis of Yersinia enterocolitica Effector Translocation into Host Cells Using Beta-lactamase Effector Fusions
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Modulation of Host Cell Processes by T3SS Effectors.

Avinash R Shenoy1, R Christopher D Furniss1, Philippa J Goddard1

  • 1MRC Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, SW7 2AZ, London, UK.

Current Topics in Microbiology and Immunology
|September 5, 2018
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Summary
This summary is machine-generated.

Enteropathogenic and enterohaemorrhagic E. coli use a type 3 secretion system (T3SS) to inject virulence proteins into host cells. These effectors manipulate host processes like the actin cytoskeleton and immune signaling to cause infection.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Pathogenesis

Background:

  • Enteropathogenic E. coli (EPEC) and enterohaemorrhagic E. coli (EHEC) are significant enteric pathogens.
  • Both EPEC and EHEC utilize a conserved type 3 secretion system (T3SS) crucial for their virulence.
  • The T3SS translocates bacterial effector proteins into host cells, disrupting cellular functions.

Purpose of the Study:

  • To review the effectors translocated by EPEC/EHEC via their T3SS.
  • To detail the host cell proteins and processes targeted by these bacterial effectors.
  • To elucidate the role of T3SS effectors in bacterial pathogenesis and host-pathogen interactions.

Main Methods:

  • Literature review and synthesis of existing research on EPEC/EHEC T3SS effectors.
  • Analysis of studies characterizing effector proteins and their interactions with host targets.
  • Discussion of host signaling pathways modulated by bacterial effectors.

Main Results:

  • EPEC/EHEC translocate 25-50 effector proteins into the host cytosol.
  • Key host targets include the actin cytoskeleton, small GTPases, and innate immune signaling pathways.
  • Characterization of effectors provides insights into pathogenesis mechanisms and host pathway regulation.

Conclusions:

  • Understanding T3SS effector function is key to comprehending EPEC/EHEC pathogenesis.
  • Detailed knowledge of effector-host interactions enhances understanding of host cell biology.
  • Future research should focus on the cooperative action of effector repertoires during infection.