Topoisomerase II SUMOylation activates a metaphase checkpoint via Haspin and Aurora B kinases
نویسندگان
چکیده
منابع مشابه
A noncatalytic function of the topoisomerase II CTD in Aurora B recruitment to inner centromeres during mitosis
Faithful chromosome segregation depends on the precise timing of chromatid separation, which is enforced by checkpoint signals generated at kinetochores. Here, we provide evidence that the C-terminal domain (CTD) of DNA topoisomerase IIα (Topo II) provides a novel function at inner centromeres of kinetochores in mitosis. We find that the yeast CTD is required for recruitment of the tension chec...
متن کاملProteomic analysis of human metaphase chromosomes reveals topoisomerase II alpha as an Aurora B substrate.
The essential Aurora B kinase is a chromosomal passenger protein that is required for mitotic chromosome alignment and segregation. Aurora B function is dependent on the chromosome passenger, INCENP. INCENP, in turn, requires sister chromatid cohesion for its appropriate behaviour. Relatively few substrates have been identified for Aurora B, so that the precise role it plays in controlling mito...
متن کاملRegulation of mitotic chromosome cohesion by Haspin and Aurora B.
In vertebrate mitosis, cohesion between sister chromatids is lost in two stages. In prophase and prometaphase, cohesin release from chromosome arms occurs under the control of Polo-like kinase 1 and Aurora B, while Shugoshin is thought to prevent removal of centromeric cohesin until anaphase. The regulatory enzymes that act to sustain centromeric cohesion are incompletely described, however. Ha...
متن کاملSUMOylation of DNA topoisomerase IIα regulates histone H3 kinase Haspin and H3 phosphorylation in mitosis
DNA topoisomerase II (TOP2) plays a pivotal role in faithful chromosome separation through its strand-passaging activity that resolves tangled genomic DNA during mitosis. Additionally, TOP2 controls progression of mitosis by activating cell cycle checkpoints. Recent work showed that the enzymatically inert C-terminal domain (CTD) of TOP2 and its posttranslational modification are critical to th...
متن کاملHaspin inhibitors reveal centromeric functions of Aurora B in chromosome segregation
Haspin phosphorylates histone H3 at threonine-3 (H3T3ph), providing a docking site for the Aurora B complex at centromeres. Aurora B functions to correct improper kinetochore-microtubule attachments and alert the spindle checkpoint to the presence of misaligned chromosomes. We show that Haspin inhibitors decreased H3T3ph, resulting in loss of centromeric Aurora B and reduced phosphorylation of ...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2019
ISSN: 0021-9525,1540-8140
DOI: 10.1083/jcb.201807189