Catalytic activity:Strict requirement for Asp at position P1 and has a preferred cleavage sequence of Val-Glu-His-Asp-|-. ,enzyme regulation:Activation is suppressed by phosphorylation at Ser-257. ,Function:Involved in the activation cascade of caspases responsible for apoptosis execution. Cleaves poly (ADP-ribose) polymerase in vitro , as well as lamins. Overexpression promotes programmed cell death. ,PTM:Cleavages by caspase-3 , caspase-8 or -10 generate the two active subunits. ,similarity:Belongs to the peptidase C14A family. ,subunit:Heterotetramer that consists of two anti-parallel arranged heterodimers , each one formed by a 18 kDa (p18) and a 11 kDa (p11) subunit. ,
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