Journal Articles Proceedings of the National Academy of Sciences of the United States of America Year : 2024

The zonula adherens matura redefines the apical junction of intestinal epithelia

Abstract

Significance

The zonula adherens (ZA), a fundamental module of epithelial cell-cell adhesion initially observed in intestinal cells, is believed to comprise a single contractile actin belt linked via E-cadherin (E-cad)-catenin to the ones of neighboring cells. Reevaluating this structure using super-resolution microscopy on intestinal samples, we show that the ZA consists of two distinct belts of adhesive complexes, a basal one with E-cad-catenin and an apical one with nectin-afadin. Contrary to the prevailing view, the major actin belt aligns with nectin and afadin, not E-cadcatenin. Genetic and physical perturbations show that afadin is essential for force transmission across cell junctions. Our work redefines the intestinal ZA architecture and prompts a reevaluation of how forces propagate within an epithelial sheet.

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hal-04876153 , version 1 (09-01-2025)

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Pierre Mangeol, Dominique Massey-Harroche, Michael Sebbagh, Fabrice Richard, André Le Bivic, et al.. The zonula adherens matura redefines the apical junction of intestinal epithelia. Proceedings of the National Academy of Sciences of the United States of America, 2024, 121, ⟨10.1073/pnas.2316722121⟩. ⟨hal-04876153⟩
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