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Accurate chromosomal segregation during mitosis is regulated by the spindle assembly checkpoint (SAC). SAC failure results in aneuploidy, a hallmark of cancer. However, many studies have suggested that aneuploidy alone is not oncogenic. We have reported that BubR1 acetylation deficiency in mice (K243R/+) caused spontaneous tumorigenesis via weakened SAC signaling and unstable chromosome‐spindle attachment,...
BubR1 acetylation is essential in spindle assembly checkpoint (SAC) signaling. Here we show that BubR1 deacetylation is a signal that initiates mitotic exit. Sustained BubR1 acetylation arrests the cells in metaphase, although chromosome congression is achieved. BubR1 deacetylation was coordinated with dephosphorylation in mitotic exit, suggesting the presence of a coordinated acetylation–phosphorylation...
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