Associates with the cytoplasmic domain of a variety of cadherins. The association of catenins to cadherins produces a complex which is linked to the actin filament network, and which seems to be of primary importance for cadherins cell-adhesion properties. Can associate with both E- and N-cadherins. Originally believed to be a stable component of E-cadherin/catenin adhesion complexes and to mediate the linkage of cadherins to the actin cytoskeleton at adherens junctions. In contrast, cortical actin was found to be much more dynamic than E-cadherin/catenin complexes and CTNNA1 was shown not to bind to F-actin when assembled in the complex suggesting a different linkage between actin and adherence junctions components. The homodimeric form may regulate actin filament assembly and inhibit actin branching by competing with the Arp2/3 complex for binding to actin filaments. May play a crucial role in cell differentiation.
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Protein Aliases: 102 kDa cadherin-associated protein; alpha E catenin; Alpha E-catenin; alpha(E)-catenin; alpha-E-catenin; cadherin associated protein; Cadherin-associated protein; CAP102; catenin (cadherin associated protein), alpha 1; catenin (cadherin-associated protein), alpha 1, 102kDa; catenin alpha 1; Catenin alpha-1; catenin, alpha 1; Renal carcinoma antigen NY-REN-13
Gene Aliases: 2010010M04Rik; AA517462; AI988031; CAP102; Catna1; CTNNA1; MDPT2