Identification and characterization of diverse OTU deubiquitinases in bacteria

Alexander F. Schubert, Justine V. Nguyen, Tyler G. Franklin, Paul P. Geurink, Cameron G. Roberts, Daniel J. Sanderson, Lauren N. Miller, Huib Ovaa, Kay Hofmann, Jonathan N. Pruneda, David Komander

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Manipulation of host ubiquitin signaling is becoming an increasingly apparent evolutionary strategy among bacterial and viral pathogens. By removing host ubiquitin signals, for example, invading pathogens can inactivate immune response pathways and evade detection. The ovarian tumor (OTU) family of deubiquitinases regulates diverse ubiquitin signals in humans. Viral pathogens have also extensively co-opted the OTU fold to subvert host signaling, but the extent to which bacteria utilize the OTU fold was unknown. We have predicted and validated a set of OTU deubiquitinases encoded by several classes of pathogenic bacteria. Biochemical assays highlight the ubiquitin and polyubiquitin linkage specificities of these bacterial deubiquitinases. By determining the ubiquitin-bound structures of two examples, we demonstrate the novel strategies that have evolved to both thread an OTU fold and recognize a ubiquitin substrate. With these new examples, we perform the first cross-kingdom structural analysis of the OTU fold that highlights commonalities among distantly related OTU deubiquitinases.

Original languageEnglish (US)
Article numbere105127
JournalEMBO Journal
Volume39
Issue number15
DOIs
StatePublished - Aug 3 2020

Keywords

  • bacterial effector
  • deubiquitinase
  • pathogen
  • protein structure
  • ubiquitin

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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