The structure of RalF, an ADP-ribosylation factor guanine nucleotide exchange factor from Legionella pneumophila, reveals the presence of a cap over the active site
Amor, J.C., Swails, J., Zhu, X., Roy, C.R., Nagai, H., Ingmundson, A., Cheng, X., Kahn, R.A.(2005) J Biol Chem 280: 1392-1400
- PubMed: 15520000 
- DOI: 10.1074/jbc.M410820200
- Primary Citation of Related Structures:  
1XSZ, 1XT0 - PubMed Abstract: 
The Legionella pneumophila protein RalF is secreted into host cytosol via the Dot/Icm type IV transporter where it acts to recruit ADP-ribosylation factor (Arf) to pathogen-containing phagosomes in the establishment of a replicative organelle. The presence in RalF of the Sec7 domain, present in all Arf guanine nucleotide exchange factors, has suggested that recruitment of Arf is an early step in pathogenesis ...