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

A GTP-binding adapter protein couples TRAIL receptors to apoptosis-inducing proteins.

Apoptosis-inducing tumor necrosis factor (TNF) family receptors recruit the proforms of caspase family cell death proteases to ligand-receptor complexes through interactions with intracellular adapter proteins. We have found that the GTP-binding protein DAP3 binds directly (with high affinity) to the death domain of TNF-related apoptosis-inducing ligand (TRAIL) receptors, and is required for TRAIL-induced apoptosis. DAP3 also associates with the pro-caspase-8-- binding adapter protein Fas- associated death domain (FADD), and links FADD to the TRAIL receptors DR4 and DR5. We have also found that binding of DAP3 to FADD and activation of pro-caspase-8 in an in vitro reconstituted system is GTP-dependent. Elucidation of this mechanism suggests GTP-binding proteins as potential targets for pharmacological intervention in TRAIL-induced apoptosis.[1]

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