Contributes to endopeptidase activity. Involved in positive regulation of proteolysis. Located in several cellular components, including Golgi apparatus; basolateral plasma membrane; and inner acrosomal membrane. Biomarker of acute necrotizing pancreatitis. Human ortholog(s) of this gene implicated in several diseases, including atypical hemolytic-uremic syndrome; hemolytic-uremic syndrome; meningococcal meningitis; multiple sclerosis; and pre-eclampsia. Orthologous to human CD46 (CD46 molecule). [provided by Alliance of Genome Resources, Apr 2022]