Legionella pneumophila modulates host energy metabolism by ADP-ribosylation of ADP/ATP translocases
- Purdue University, United States
- Pacific Northwest National Laboratory, United States
- Jilin University, China
Abstract
The intracellular pathogen Legionella pneumophila delivers more than 330 effectors into host cells by its Dot/Icm secretion system. Those effectors direct the biogenesis of the Legionella-containing vacuole (LCV) that permits its intracellular survival and replication. It has long been documented that the LCV is associated with mitochondria and a number of Dot/Icm effectors have been shown to target to this organelle. Yet, the biochemical function and host cell target of most of these effectors remain unknown. Here, we found that the Dot/Icm substrate Ceg3 (Lpg0080) is a mono-ADP-ribosyltransferase that localizes to the mitochondria in host cells where it attacks ADP/ATP translocases by ADP-ribosylation, and blunts their ADP/ATP exchange activity. The modification occurs on the second arginine residue in the -RRRMMM- element, which is conserved among all known ADP/ATP carriers from different organisms. Our results reveal modulation of host energy metabolism as a virulence mechanism for L. pneumophila.
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Funding
National Institute of Health (R01AI127465)
- Zhao-Qing Luo
Jilin Science and Technology Agency (20200403117SF)
- Lei Song
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.
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Legionella pneumophila modulates host energy metabolism by ADP-ribosylation of ADP/ATP translocases
eLife 11:e73611.
https://doi.org/10.7554/eLife.73611
