BUB1 and BUBR1: Multifaceted kinases of the cell cycle

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Abstract

The multidomain protein kinases BUB1 and BUBR1 (Mad3 in yeast, worms and plants) are central components of the mitotic checkpoint for spindle assembly (SAC). This evolutionarily conserved and essential self-monitoring system of the eukaryotic cell cycle ensures the high fidelity of chromosome segregation by delaying the onset of anaphase until all chromosomes are properly bi-oriented on the mitotic spindle. Despite their amino acid sequence conservation and similar domain organization, BUB1 and BUBR1 perform different functions in the SAC. Recent structural information provides crucial molecular insights into the regulation and recognition of BUB1 and BUBR1, and a solid foundation to dissect the roles of these proteins in the control of chromosome segregation in normal and oncogenic cells. © 2010 Elsevier Ltd.

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Bolanos-Garcia, V. M., & Blundell, T. L. (2011, March). BUB1 and BUBR1: Multifaceted kinases of the cell cycle. Trends in Biochemical Sciences. https://doi.org/10.1016/j.tibs.2010.08.004

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