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Ubiquitin-regulating effector proteins from Legionella.

Minwoo Jeong1, Hayoung Jeon1, Donghyuk Shin1

  • 1Department of System Biology, College of Life Sciences and Biotechnology, Yonsei University, Seoul 03722, Korea.

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Summary

Ubiquitin, a key protein regulator, is manipulated by the pathogen Legionella. This review details how Legionella effectors mimic or uniquely alter host ubiquitination for cellular invasion.

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Area of Science:

  • Cellular Biology
  • Microbiology
  • Biochemistry

Background:

  • Ubiquitin is crucial for protein homeostasis and cellular signaling.
  • Ubiquitination targets proteins for degradation via proteasome or autophagy.
  • Pathogens like Legionella interfere with host ubiquitination.

Approach:

  • This review summarizes current knowledge on Legionella's interaction with the ubiquitin system.
  • It compares the structural and biochemical properties of host ubiquitin machinery and Legionella effectors.
  • Novel ubiquitination mechanisms employed by Legionella are highlighted.

Key Points:

  • Legionella translocates numerous effector proteins into host cells.
  • Some Legionella effectors function similarly to host ubiquitin enzymes.
  • Other effectors exhibit unique structures and employ non-canonical ubiquitination mechanisms.

Conclusions:

  • Legionella extensively utilizes and modifies host ubiquitination pathways.
  • Understanding these interactions reveals novel ubiquitination strategies.
  • This research offers insights into pathogen virulence and host-pathogen dynamics.