Contributes to the regulation of alternative splicing of pre-mRNAs. Component of a ribonucleoprotein complex containing mRNAs and RNA-binding proteins including DDX5, HNRNPH2 and SRSF1 as well as ARVCF (PubMed:24644279). Interacts (via the extreme C-terminus) with FRMPD2 (via the PDZ 2 domain) (PubMed:19706687). Interacts with CCDC85B (PubMed:25009281). In heart, localizes at area composita, the mixed-type junctional structure composed of both desmosomal and adherens junctional proteins. Found in all the examined tissues including heart, brain, liver and kidney. Found at low level in lung. Expressed in dermal connective tissue, salivary gland duct and in the corneal layer (at protein level) (PubMed:30479852). Expressed in arrector pili muscle (at protein level) (PubMed:29034528). High levels detected in epithelial cells with lower levels found in fibroblasts and T lymphocytes (PubMed:10725230). Belongs to the beta-catenin family.