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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

A bacterial guanine nucleotide exchange factor activates ARF on Legionella phagosomes.

The intracellular pathogen Legionella pneumophila subverts vesicle traffic in eukaryotic host cells to create a vacuole that supports replication. The dot/icm genes encode a protein secretion apparatus that L. pneumophila require for biogenesis of this vacuole. Here we show that L. pneumophila produce a protein called RalF that functions as an exchange factor for the ADP ribosylation factor ( ARF) family of guanosine triphosphatases (GTPases). The RalF protein is required for the localization of ARF on phagosomes containing L. pneumophila. Translocation of RalF protein through the phagosomal membrane is a dot/icm-dependent process. Thus, RalF is a substrate of the Dot/Icm secretion apparatus.[1]

References

  1. A bacterial guanine nucleotide exchange factor activates ARF on Legionella phagosomes. Nagai, H., Kagan, J.C., Zhu, X., Kahn, R.A., Roy, C.R. Science (2002) [Pubmed]
 
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