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- W1996047595 abstract "Dicentric chromosomes undergo a breakage-fusion-bridge cycle as a consequence of having two centromeres on the same chromatid attach to opposite spindle poles in mitosis. Suppression of dicentric chromosome breakage reflects loss of kinetochore function at the kinetochore-microtubule or the kinetochore-DNA interface. Using a conditionally functional dicentric chromosome in vivo, we demonstrate that kinetochore mutants exhibit quantitative differences in their degree of chromosome breakage. Mutations in chl4/mcm17/ctf17 segregate dicentric chromosomes through successive cell divisions without breakage, indicating that only one of the two centromeres is functional. Centromere DNA introduced into the cell is unable to promote kinetochore assembly in the absence of CHL4. In contrast, established centromeres retain their segregation capacity for greater than 25 generations after depletion of Chl4p. The persistent mitotic stability of established centromeres reveals the presence of an epigenetic component in kinetochore segregation. Furthermore, this study identifies Chl4p in the initiation and specification of a heritable chromatin state." @default.
- W1996047595 created "2016-06-24" @default.
- W1996047595 creator A5068057210 @default.
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- W1996047595 date "2003-03-17" @default.
- W1996047595 modified "2023-10-04" @default.
- W1996047595 title "Differential kinetochore protein requirements for establishment versus propagation of centromere activity in <i>Saccharomyces cerevisiae </i>" @default.
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- W1996047595 doi "https://doi.org/10.1083/jcb.200211116" @default.
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