Model for mitosis‐induced apoptosis.

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Apoptosis By Douglas R. Green

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Model for mitosis‐induced apoptosis. Model for mitosis‐induced apoptosis. (A) In normal mitosis, CDK1/cyclin B1‐mediated phosphorylation (P) inhibits pro‐ and anti‐apoptotic proteins, including Bcl‐xL, Bcl‐2, caspase‐2 (C2) and caspase‐9 (C9), whereas it causes the APC/CCdc20‐mediated ubiquitination (Ub) and subsequent degradation of Mcl‐1. (B) When mitotic arrest is prolonged, constant degradation of Mcl‐1 ultimately triggers mitochondrial outer membrane permeabilization and the release of cytochrome c. Presumably, prolonged mitotic arrest also causes dephosphorylation of caspase‐2 and caspase‐9, which can induce activation of the apoptotic pathways upstream and downstream of the mitochondria, respectively. See the text for details. Manabu Kurokawa, and Sally Kornbluth EMBO J. 2010;29:2255-2257 © as stated in the article, figure or figure legend