Probable regulator of the NF-kappa-B and type I interferon signaling pathways. May also regulate the type II interferon signaling pathway. Plays a role in homeostatic control of innate immunity and in antiviral defense mechanisms (By similarity). Belongs to the NLRP family. Supposed to contain a CARD domain at the N-terminus. However, this domain is not detected by Pfam, PROSITE or SMART. Has a weak similarity with a DAPIN domain.