Cysteinyl aspartate-specific proteinase; a member of a group of cellular cysteine endopeptidases that cleave so as to leave an C-terminal aspartate residue. The group includes interleukin-converting enzymes and enzymes associated with activation of apoptosis either as initiators near the head of a cascade of events, or as executioners, which perform limited proteolysis of cellular proteins at the bottom of the cascade.