Cell autonomous polarization by the planar cell polarity signaling pathway.

ABSTRACT: As epithelial cells polarize in the tissue plane, the Planar Cell Polarity (PCP) signaling module segregates two distinct molecular subcomplexes to opposite sides of cells. Homodimers of the atypical cadherin Flamingo form bridges linking opposite complexes in neighboring cells, coordinating their direction of polarization. Feedback is required for cell polarization, but whether feedback requires intercellular and/or intracellular pathways is unknown. Using novel tools, we show that cells lacking Flamingo, or bearing a homodimerization-deficient Flamingo, polarize autonomously, indicating that functional PCP subcomplexes form and segregate cell-autonomously. Furthermore, we identify feedback pathways and propose an asymmetry amplifying mechanism that operate cell-autonomously. The intrinsi

SUBMITTER: Weiner AT 

PROVIDER: S-EPMC12569089 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature