Microtubules perform an active role in communication within the cell by transmitting received signals to the cell's functional units. Researchers at the Paul Scherrer Institute PSI and the Department of Biomedicine at the University of Basel have now, for the first time, structurally elucidated how these protein strands of the cytoskeleton accomplish this. Their findings could help make it possible to intervene in this communication and, for example, prevent tumor growth. The study was published in Cell.