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Title: Legionella pneumophila modulates host energy metabolism by ADP-ribosylation of ADP/ATP translocases

Journal Article · · eLife
 [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Jilin Univ., Changchun (China). The First Hospital, Center of Pathogen Biology and Infectious Diseases, Key Lab. of Organ Regeneration and Transplantation, State Key Lab. of Zoonotic Diseases

The intracellular pathogen Legionella pneumophila delivers more than 330 effectors into host cells by its Dot/Icm type IV secretion system. Those effectors are essential for 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 (ANTs) 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 novel virulence mechanism for L. pneumophila.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; National Institutes of Health (NIH)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1854915
Report Number(s):
PNNL-SA-165115
Journal Information:
eLife, Journal Name: eLife Vol. 11; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English

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