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

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Spodoptera frugiperda caspase-1, a novel insect death protease that cleaves the nuclear immunophilin FKBP46, is the target of the baculovirus antiapoptotic protein p35.

Employing the degenerate primer-dependent polymerase chain reaction approach used recently to clone human Mch2, we have identified and cloned the insect Spodoptera frugiperda target of the baculovirus antiapoptotic protein p35. This protein named Sf caspase-1 belongs to the family of caspases and is highly related to human Mch3 and CPP32 in sequence and specific activity. The proenzyme of Sf caspase-1 is 299 amino acids in length and can undergo autocatalytic processing in Escherichia coli to an active enzyme heterocomplex. Autoprocessing occurs at Asp-28, Asp-184, and Asp-195 to generate the large p19/ p18 and small p12 subunits. Sf caspase-1 is able to induce apoptosis in Sf9 cells and is capable of cleaving p35 to similar sized fragments as observed with extracts from p35 null mutant baculovirus-infected Sf9 cells. Sf caspase-1 activity is potently inhibited by p35, suggesting that it is an important target of this antiapoptotic protein. Finally, the Sf9 nuclear immunophilin FKBP46 was identified as a death-associated substrate for Sf caspase-1.[1]

References

  1. Spodoptera frugiperda caspase-1, a novel insect death protease that cleaves the nuclear immunophilin FKBP46, is the target of the baculovirus antiapoptotic protein p35. Ahmad, M., Srinivasula, S.M., Wang, L., Litwack, G., Fernandes-Alnemri, T., Alnemri, E.S. J. Biol. Chem. (1997) [Pubmed]
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