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 (By similarity). Interacts (via the extreme C-terminus) with FRMPD2 (via the PDZ 2 domain). Interacts with CCDC85B (By similarity). In heart, localizes at area composita, the mixed-type junctional structure composed of both desmosomal and adherens junctional proteins. Expressed in optic nerve sheath envelope (at protein level) (PubMed:29445566). Expressed in heart (at protein level) (PubMed:31384490). Belongs to the beta-catenin family.