Univ.-Prof. Dr. Roland Knorr
Univ.-Prof. Dr. Roland Knorr
Emmy Noether Group Leader “Interfacial Cell Biology”, Professor for Biochemistry and Molecular Biology
Über das Knorr Labor
Wie entstehen Organellen in Zellen? Dieser Frage geht unsere DFG-geförderte Emmy Noether-Gruppe „Interfacial Cell Biology“ im Rahmen der Professur für Biochemie und Molekularbiologie an der Medizinischen Fakultät, Universität zu Köln und Uniklinik Köln nach.
Wir konzentrieren uns insbesondere auf strukturbildende, physiologische Prozesse, die durch Kontakte zwischen neu entstehenden flüssigen Kompartimenten (auch bekannt als biomolekulare Kondensate, membranlose Organellen oder Tröpfchen) und herkömmlichen zellulären Strukturen vermittelt werden, z.B. membrangebundene Organellen.
Ausgewählte Publikationen
Hauer, L.; Sporbeck, K.; McKenna J. F.; Puchkov, D.; May, A. I.; Frigerio, L.; Knorr, R. L.; Bahrami, A. H.: Condensate-mediated shape transformations of cellular membranes by capillary forces. PNAS, 2026
For condensate-localized, interfacial membranes (tubes, sheets and cup-shapes), we calculate free energies, identify energy barriers of their shape transitions, report tube-to-cup shape hysteresis and propose a role of condensates for the biogenesis of cup-like ‘bulbs’ in plant vacuoles.Wang, Y.; Li, S.; Mokbel, M. [...] Knorr, R. L.; Fang, X.: Biomolecular condensates mediate bending and scission of endosome membranes. Nature, 2024
We report that condensates mediate scission of membrane necks without the ESCRT or dynamin protein machineries or ATP consumption.
► Pressemitteilung der Universität zu Köln
► Research briefing in NatureKusumaatmaja, H.; May, A. I.; Knorr, R. L.: Intracellular wetting mediates contacts between liquid compartments and membrane-bound organelles. Journal of Cell Biology, 2021
First review on intracellular capillarity, focussing on membrane-bound organelles.Kusumaatmaja, H.; May, A. I.; Feeney, M.; McKenna, J. F.; Mizushima, N.; Frigerio, L.; Knorr, R. L.: Wetting of phase-separated droplets on plant vacuole membranes leads to a competition between tonoplast budding and nanotube formation. PNAS, 2021
We show that condensates mediate formation of protein storage vacuoles in plants.Agudo-Canalejo, J.; Schultz, S. W.; Chino, H.; Migliano, S.; Saito, C.; Koyama-Honda, I.; Stenmark, H.; Brech, A.; May, A. I.; Mizushima, N.; Knorr, R. L.: Wetting regulates autophagy of phase separated droplets and the cytosol. Nature, 2021
First demonstration of intracellular capillary force existing and being physiologically relevant during the formation of autophagosomes.Fujioka, Y; Alam, J. M. D.; Noshiro, D.; Mouri, K.; Ando, T.; Okada, Y.; May, A. I.; Knorr, R. L.; Suzuki, K.; Ohsumi, Y; Noda, N. N.: Phase separation organizes the site of autophagosome formation. Nature, 2020
We discovered that the yeast autophagy initiation complex is a liquid-like condensate.