Site-specific N-glycosylation of integrin α2 mediates collagen-dependent cell survival
Yen‐Lin Huang, Ching-Yeu Liang, Vera Labitzky, Danilo Ritz, Tiago Oliveira, Cécile Cumin, Manuela Estermann, Tobias Lange, Arun Everest‐Dass, Francis Jacob
Abstract
-glycosylated ITGA2 were marginally adherent to collagen, likely associated with its enhanced proteasome degradation through poly-ubiquitination. Proteomic and enrichment pathway analysis revealed increased cellular apoptosis and collagen organization in non-glycosylated ITGA2 mutant cells. Moreover, we provide evidence that ITGA2-specific sialylation is involved in selective cell-ECM binding. These results highlight the importance of glycans in regulating ITGA2 stability and ligand binding capacity which in turn modulates downstream focal adhesion and promotes cell survival in a collagen environment.