Biofunctional Nanodot Arrays in Living Cells Uncover Synergistic Co-Condensation of Wnt Signalodroplets
Autor(en): | Philippi, Michael Richter, Christian P. Kappen, Marie Watrinet, Isabelle Miao, Yi Runge, Mercedes Jorde, Lara Korneev, Sergej Holtmannspoetter, Michael Kurre, Rainer Holthuis, Joost C. M. Garcia, K. Christopher Plueckthun, Andreas Steinhart, Martin Piehler, Jacob You, Changjiang |
Stichwörter: | ACTIVATION; AXIN; capillary nanostamping; Chemistry; Chemistry, Multidisciplinary; Chemistry, Physical; DEP DOMAIN; DYNAMICS; LIGAND-RECEPTOR INTERACTIONS; liquid-liquid phase separation; Materials Science; Materials Science, Multidisciplinary; MECHANISM; Nanoscience & Nanotechnology; ORGANIZATION; Physics; Physics, Applied; Physics, Condensed Matter; plasma membrane compartmentalization; PLASMA-MEMBRANE; PROTEIN INTERACTIONS; protein nanoarrays; REVEALS; Science & Technology - Other Topics; signaling platforms; Wnt/beta-catenin signaling | Erscheinungsdatum: | 2022 | Herausgeber: | WILEY-V C H VERLAG GMBH | Journal: | SMALL | Zusammenfassung: | Qualitative and quantitative analysis of transient signaling platforms in the plasma membrane has remained a key experimental challenge. Here, biofunctional nanodot arrays (bNDAs) are developed to spatially control dimerization and clustering of cell surface receptors at the nanoscale. High-contrast bNDAs with spot diameters of approximate to 300 nm are obtained by capillary nanostamping of bovine serum albumin bioconjugates, which are subsequently biofunctionalized by reaction with tandem anti-green fluorescence protein (GFP) clamp fusions. Spatially controlled assembly of active Wnt signalosomes is achieved at the nanoscale in the plasma membrane of live cells by capturing the co-receptor Lrp6 into bNDAs via an extracellular GFP tag. Strikingly, co-recruitment is observed of co-receptor Frizzled-8 as well as the cytosolic scaffold proteins Axin-1 and Disheveled-2 into Lrp6 nanodots in the absence of ligand. Density variation and the high dynamics of effector proteins uncover highly cooperative liquid-liquid phase separation (LLPS)-driven assembly of Wnt ``signalodroplets'' at the plasma membrane, pinpointing the synergistic effects of LLPS for Wnt signaling amplification. These insights highlight the potential of bNDAs for systematically interrogating nanoscale signaling platforms and condensation at the plasma membrane of live cells. |
ISSN: | 1613-6810 | DOI: | 10.1002/smll.202203723 |
Zur Langanzeige
Seitenaufrufe
11
Letzte Woche
2
2
Letzter Monat
0
0
geprüft am 27.04.2024