Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria.|Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria.|Department of Microbiology, Radboud University Nijmegen, Nijmegen, The Netherlands.|Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria.|Department of Genome Oriented Bioinformatics, Technische Universität München, Freising, Germany.|Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria Department of Genome Oriented Bioinformatics, Technische Universität München, Freising, Germany.