Diarrheal toxin that hydrolyzes gelatin, azocoll, actin, tropomyosin, and fibrinogen. Broad proteolytic specificity, bonds hydrolyzed includes -Gly-|-Leu-, -Met-|-Leu-, -Phe-|-Leu-, -Cys-|-Leu-, -Leu-|-Gly-. Binds 1 zinc ion per subunit. Optimum pH is 6.5. Optimum temperature is 37 degrees Celsius. Belongs to the peptidase M10C family.