Acts as a scaffolding protein that can activate the inflammatory transcription factor NF-kappa-B and p38/JNK MAP kinase signaling pathways. Forms a signaling complex with BCL10 and MALT1, and activates MALT1 proteolytic activity and inflammatory gene expression. MALT1 is indispensable for CARD14-induced activation of NF-kappa-B and p38/JNK MAP kinases. May play a role in signaling mediated by TRAF2, TRAF3 and TRAF6 and protects cells against apoptosis. Interacts (via CARD domain) with BCL10 (via CARD domain). Forms a complex with MALT1 and BCL10; resulting in the formation of a CBM (CARD14-BLC10-MALT1) complex. Interacts with TRAF2, TRAF3 and TRAF6. A linker region between the coiled-coil and PDZ region holds the protein in an inactive state. Supposed to contain a SH3 domain which is not detected by PROSITE, Pfam or SMART.