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

The role of CAP3 in CD95 signaling: new insights into the mechanism of procaspase-8 activation.

Formation of the CD95 (APO-1/Fas) death inducing signaling complex (DISC) plays a central role in CD95 signaling. Previously, CD95 DISC composition was analyzed by two-dimensional gel electrophoresis and four major cytotoxicity-associated proteins (CAP1-4) were found. CAP1 and CAP2 were defined to be unmodified and phosphorylated FADD, respectively. CAP4 was identified as procaspase-8a. CAP3, however, has remained elusive. In this study, we demonstrate that CAP3 is an intermediate of procaspase-8 processing. CAP3 is generated within seconds of DISC formation and subsequently processed to the prodomain of procaspase-8a that is known as p26 (CAP5). These findings lead to new insights into the mechanism of procaspase-8 processing and apoptosis initiation.[1]


  1. The role of CAP3 in CD95 signaling: new insights into the mechanism of procaspase-8 activation. Golks, A., Brenner, D., Schmitz, I., Watzl, C., Krueger, A., Krammer, P.H., Lavrik, I.N. Cell Death Differ. (2006) [Pubmed]
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