1. Membrane Protein Mechanisms Unit, Institut Pasteur, 75015 Paris, France.
2. Membrane Protein Mechanisms Group, European Institute of Chemistry and Biology, University of Bordeaux, 33607 Pessac, France.
3. CNRS UMR 5234 Fundamental Microbiology and Pathogenicity, Bordeaux, France.
4. Laboratory of Humoral Immunology, Department of Immunology, Institut Pasteur, Paris, France.
5. INSERM U1222, Paris, France.
6. Structure and Function of Bacterial Nanomachines Group, European Institute of Chemistry and Biology, University of Bordeaux, 33607 Pessac, France.