CARD Domains in Apoptosis
CARD domains were originally characterized based on their involvement in the regulation of caspase activation and apoptosis. The basic six-helix structure of the domain appears to be conserved as far back as the ced-3 and ced-4 genes in C. elegans, the organism in which several components of the apoptotic machinery were first characterized. CARD motifs are present on a number of proteins that promote apoptosis, primarily caspases 1,2,4,5,9, and 15 in mammals.
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