Has no protease activity. May reduce cytokine release in response to bacterial lipopolysaccharide during infections. Reduces activation of NF-kappa-B in response to TNF. Detected in heart, kidney, liver, lung, pancreas, small intestine, spleen, stomach, thymus and testis. Belongs to the peptidase C14A family. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.