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Related Experiment Videos

Assembly, structure, function and regulation of type III secretion systems.

Wanyin Deng1, Natalie C Marshall1,2, Jennifer L Rowland1

  • 1Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.

Nature Reviews. Microbiology
|April 11, 2017
PubMed
Summary

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Type III secretion systems (T3SSs) are bacterial nanomachines that inject proteins into host cells. Understanding T3SS structure and function aids drug design and biotechnology.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Structural Biology

Background:

  • Type III secretion systems (T3SSs) are essential nanomachines in Gram-negative bacteria.
  • They function as molecular syringes, injecting effector proteins into host cells.
  • T3SSs mediate critical interactions between bacteria and their hosts.

Purpose of the Study:

  • To review current knowledge on the structure and function of T3SSs.
  • To highlight recent advances in understanding T3SS architecture and effector roles.
  • To discuss the potential of T3SSs as targets for vaccines, therapeutics, and biotechnology.

Main Methods:

  • Cryo-electron microscopy and integrative imaging for structural analysis.
  • Genetic and molecular analyses to elucidate effector functions and regulatory mechanisms.

Related Experiment Videos

  • Review of existing literature on T3SS assembly and secretion hierarchy.

    • Main Results:

    • Unprecedented structural and architectural insights into T3SSs have been obtained.
    • Functions of numerous effector proteins and regulators have been identified.
    • The secretion hierarchy, or sequential protein release, is better understood.

    Conclusions:

    • T3SSs are crucial virulence factors with significant implications for host-pathogen interactions.
    • Advances in structural and functional studies provide a foundation for mechanism-based drug design.
    • Further understanding of T3SSs can drive biotechnological applications and therapeutic strategies.