A bifunctional allosteric site in the dimer interface of procaspase-3.
A bifunctional allosteric site in the dimer interface of procaspase-3.
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DOI:
10.1016/j.bpc.2011.05.013
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发表时间:
2011-11
影响因子:
3.8
通讯作者:
Clark AC
中科院分区:
文献类型:
--
作者:
Schipper JL;MacKenzie SH;Sharma A;Clark AC
The dimer interface of caspase-3 contains a bifunctional allosteric site in which the enzyme can be activated or inactivated, depending on the context of the protein. In the mature caspase-3, the binding of allosteric inhibitors to the interface results in an order-to-disorder transition in the active site loops. In procaspase-3, by contrast, the binding of allosteric activators to the interface results in a disorder-to-order transition in the active site. We have utilized the allosteric site to identify a small molecule activator of procaspase and to characterize it's binding to the protease. The data suggest that an efficient activator must stabilize the active conformer of the zymogen by expelling the intersubunit linker from the interface, and it must interact with active site residues found in the allosteric site. Small molecule activators that fulfill the two requirements should provide scaffolds for drug candidates as a therapeutic strategy for directly promoting procaspase-3 activation in cancer cells.
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影响因子:
4.8
作者:
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通讯作者:
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DOI:
10.1073/pnas.0404781101
发表时间:
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