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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Casper is a FADD- and caspase-related inducer of apoptosis.

Caspases are cysteine proteases that play a central role in apoptosis. Caspase-8 may be the first enzyme of the proteolytic cascade activated by the Fas ligand and tumor necrosis factor (TNF). Caspase-8 is recruited to Fas and TNF receptor-1 (TNF-R1) through interaction of its prodomain with the death effector domain (DED) of the receptor- associating FADD. Here we describe a novel 55 kDa protein, Casper, that has sequence similarity to caspase-8 throughout its length. However, Casper is not a caspase since it lacks several conserved amino acids found in all caspases. Casper interacts with FADD, caspase-8, caspase-3, TRAF1, and TRAF2 through distinct domains. When overexpressed in mammalian cells, Casper potently induces apoptosis. A C-terminal deletion mutant of Casper inhibits TNF- and Fas-induced cell death, suggesting that Casper is involved in these apoptotic pathways.[1]


  1. Casper is a FADD- and caspase-related inducer of apoptosis. Shu, H.B., Halpin, D.R., Goeddel, D.V. Immunity (1997) [Pubmed]
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