Activates NF-kappa-B via BCL10. Defects in CARD9 are the cause of familial candidiasis type 2 (CANDF2). Chronic mucocutaneous candidiasis is characterized by impaired clearance of fungal infections and results in colonization and infections of the mucosa or skin, predominantly with Candida albicans. CANDF2 is an autosomal recessive chronic mucocutaneous candidiasis. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.