FEATURES

FAMILY

DESCRIPTION

Also known as CTNA1_MOUSE, Ctnna1, Catna1. 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 adherens 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. Involved in the regulation of WWTR1/TAZ, YAP1 and TGFB1-dependent SMAD2 and SMAD3 nuclear accumulation (PubMed:21145499). May play a crucial role in cell differentiation. Monomer and homodimer; the monomer preferentially binds to CTNNB1 and the homodimer to actin (PubMed:16325583). Component of an cadherin:catenin adhesion complex composed of at least of CDH26, beta-catenin/CTNNB1, alpha-catenin/CTNNA1 and p120 catenin/CTNND1 (By similarity). Possible component of an E-cadherin/ catenin adhesion complex together with E-cadherin/CDH1 and beta-catenin/CTNNB1 or gamma-catenin/JUP; the complex is located to adherens junctions (PubMed:7982500, PubMed:16325582, PubMed:16325583, PubMed:18093941, PubMed:25653389, PubMed:10882138). The stable association of CTNNA1 is controversial as CTNNA1 was shown not to bind to F-actin when assembled in the complex (PubMed:16325582, PubMed:18093941). Alternatively, the CTNNA1-containing complex may be linked to F-actin by other proteins such as LIMA1 (PubMed:18093941). Binds AFDN and F-actin (PubMed:11907041). Interacts with LIMA1 (By similarity) (PubMed:18093941). Interacts with ARHGAP21 (By similarity). Interacts with AJUBA (By similarity). Interacts with vinculin/VCL (By similarity).

EXTERNAL LINKS

Ctnna1

Catenin alpha-1

Ctnna1

Molecular Synopsis