Chua BT, Volbracht C, Tan KO, Li R, Yu V, and Li P. Mitochondrial translocation of cofilin is an early step in apoptosis induction. NATURE CELL BIOLOGY 5: 1083-1089, 2003

root 提交于 周日, 10/31/2021 - 01:47
Abstract Increasing evidence suggests that movement of key proteins in or out of mitochondria during apoptosis is essential for the regulation of apoptosis. Here, we report identification of the actin-binding protein cofilin by a proteomic approach, as such a factor translocated from cytosol into mitochondria after induction of apoptosis. We found that after induction of apoptosis, cofilin was translocated to mitochondria before release of cytochrome c. Reduction of cofilin protein levels with small-interfering RNA (siRNA) resulted in inhibition of both cytochrome c release and apoptosis. Only dephosphorylated cofilin was translocated to mitochondria, and the cofilin S3D mutant, which mimicks the phosphorylated form, suppressed mitochondrial translocation and apoptosis. Translocation was ......

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