1. Biochemistry and Cell Biology, Molecular Life Science Center, Jacobs University Bremen, 28759 Bremen, Germany
2. Department of Microbiology and Immunology, Sultan Qaboos University, Muscat 123, Oman
3. Medical and Natural Sciences Research Center, University of Tübingen, 72074 Tübingen, Germany
4. INSERM, U580, 75015 Paris, France, and Université Paris Descartes, Faculté de Médecine René Descartes, 75015 Paris, France
5. Department of Medical Microbiology, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX Utrecht, and Department of Medical Microbiology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
6. Cluster of Excellence ‘Macromolecular Complexes’, Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Marie-Curie-Str. 9, 60439 Frankfurt, Germany