Molecular genetic study of Caenorhabditis elegans revealed the cell de
ath-executing gene ced-3 Structural and functional similarities betwee
n CED-3 and mammalian ICE family (caspase) gene products provide the e
vidence that mammalian caspases are common mediators in executing prog
rammed cell death. These findings suggest that the execution mechanism
s of cell death by caspase family protease may be evolutionarily conse
rved from worms to mammals. This report summarizes the unique properti
es of caspases in apoptosis.