Structure of the GTPase and GDI domains of FeoB, the ferrous iron transporter of Legionella pneumophila.Petermann, N., Hansen, G., Schmidt, C.L., Hilgenfeld, R.
(2010) FEBS Lett 584: 733-738
- PubMed: 20036663
- DOI: https://doi.org/10.1016/j.febslet.2009.12.045
- Primary Citation of Related Structures:
- PubMed Abstract:
Prokaryotic pathogens have developed specialized mechanisms for efficient uptake of ferrous iron (Fe(2+)) from the host. In Legionella pneumophila, the causative agent of Legionnaires' disease, the transmembrane GTPase FeoB plays a key role in Fe(2+) acquisition and virulence. FeoB consists of a membrane-embedded core and an N-terminal, cytosolic region (NFeoB). Here, we report the crystal structure of NFeoB from L. pneumophila, revealing a monomeric protein comprising two separate domains with GTPase and guanine-nucleotide dissociation inhibitor (GDI) functions. The GDI domain displays a novel fold, whereas the overall structure of the GTPase domain resembles that of known G domains but is in the rarely observed nucleotide-free state.
Institute of Biochemistry, Center for Structural and Cell Biology in Medicine, University of Lübeck, Lübeck, Germany.