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Caspase-7 is an obligate dimer of catalytic domains, with generation of activity requiring limited proteolysis within a region that separates the large and small chains of each domain. Using hybrid dimers we distinguish the relative contribution of each domain to catalysis by the whole molecule. We demonstrate that the zymogen arises from direct dimerization and not domain swapping. In contrast to...
Caspases are cysteine proteases that are key effectors in apoptotic cell death. Currently, there is a lack of tools that can be used to monitor the regulation of specific caspases in the context of distinct apoptotic programs. We describe the development of highly selective inhibitors and active site probes and their applications to directly monitor executioner (caspase-3 and -7) and initiator (caspase-8...
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