Leoa, B and C from Enterotoxigenic Escherichia Coli (Etec) are Bacterial Dynamins.Michie, K.A., Boysen, A., Low, H.H., Moller-Jensen, J., Lowe, J.
(2014) PLoS One 9: 07211
- PubMed: 25203511
- DOI: https://doi.org/10.1371/journal.pone.0107211
- Primary Citation of Related Structures:
- PubMed Abstract:
Escherichia coli (ETEC) strain H10407 contains a GTPase virulence factor, LeoA, which is encoded on a pathogenicity island and has been shown to enhance toxin release, potentially through vesicle secretion. By sequence comparisons and X-ray structure determination we now identify LeoA as a bacterial dynamin-like protein (DLP). Proteins of the dynamin family remodel membranes and were once thought to be restricted to eukaryotes. In ETEC H10407 LeoA localises to the periplasm where it forms a punctate localisation pattern. Bioinformatic analyses of leoA and the two upstream genes leoB and leoC suggest that LeoA works in concert with a second dynamin-like protein, made up of LeoB and LeoC. Disruption of the leoAB genes leads to a reduction in secretion of periplasmic Tat-GFP and outer membrane OmpA. Our data suggest a role for LeoABC dynamin-like proteins in potentiating virulence through membrane vesicle associated toxin secretion.
Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark.