1. European Molecular Biology Laboratory (EMBL) , Meyerhofstraße 1, 69117 Heidelberg , Germany
2. Department of Structural Biology and Center of Excellence for Data-Driven Discovery, St. Jude Children's Research Hospital , 262 Danny Thomas Place, Memphis , TN 38105 , USA
3. Bioinformatics Group, Department of Computer Science, University of Freiburg , 79098 Freiburg im Breisgau, Germany
4. Center for Life Nano & Neuroscience, Italian Institute of Technology, 00161 Rome, Italy and Department of Biology, Sapienza University of Rome , 00185 Rome , Italy