Cancer Susceptibility Candidate 3 (CASC3)

Protein CASC3 is a core component of the exon junction complex (EJC), a protein complex that is deposited on spliced mRNAs at exon-exon junctions and functions in nonsense-mediated mRNA decay (NMD). The encoded protein binds RNA and interacts with two other EJC core components. It is predominantly located in the cytoplasm, but shuttles into the nucleus where it localizes to nuclear speckles.Forms homooligomers (By similarity). Interacts with STAU in an RNA-dependent manner (By similarity). Part of the EJC core complex that contains CASC3, EIF4A3, MAGOH and RBM8A. Found in a mRNA splicing-dependent exon junction complex (EJC), at least composed of ACIN1, CASC3, EIF4A3, MAGOH, PNN, RBM8A, RNPS1, SAP18 and THOC4. Interacts with EIF4A3, MAGOH, NXF1 and RBM8A.