The Aurora B gradient sustains kinetochore stability in anaphase.

The Aurora B gradient sustains kinetochore stability in anaphase.
复制标题

DOI:
10.1016/j.celrep.2021.109818
复制
发表时间:
2021-11-09
期刊:
影响因子:
8.8
通讯作者:
Higgins JMG
Higgins JMG
中科院分区:
生物学1区
文献类型:
--
作者:
Papini D;Levasseur MD;Higgins JMG

文献摘要

参考文献

相似文献

在有丝分裂中,动粒在染色体上组装,使微管附着并实现染色体的精确分离。激酶Cyclin B-Cdk 1和Aurora B对于稳定的动粒的形成至关重要。然而,这两种激酶的活性似乎显着下降,在着丝粒在后期发病,正是当微管附件需要移动染色体向两极的分裂细胞。我们发现,虽然极光B叶着丝粒在后期,极光B活性的梯度中心的主轴仍然能够磷酸化的动粒底物,如Dsn 1调节动粒稳定性在后期和调节动粒解体细胞进入末期。我们提供了一个模型来解释极光B如何与细胞周期蛋白B-Cdk 1合作,以维持后期动粒功能。中心纺锤体Aurora B靶向后期的动粒底物Aurora B对Dsn 1的磷酸化稳定后期的动粒Dsn 1磷酸化调节后期的染色体运动在有丝分裂中动粒在染色体上组装以允许精确的染色体分离。Papini等人发现,虽然极光B叶着丝粒在后期,极光B活性梯度集中在中央纺锤体磷酸化动粒底物,如Dsn 1,以调节动粒稳定性和染色体运动后期。
Kinetochores assemble on chromosomes in mitosis to allow microtubules to attach and bring about accurate chromosome segregation. The kinases Cyclin B-Cdk1 and Aurora B are crucial for the formation of stable kinetochores. However, the activity of these two kinases appears to decline dramatically at centromeres during anaphase onset, precisely when microtubule attachments are required to move chromosomes toward opposite poles of the dividing cell. We find that, although Aurora B leaves centromeres at anaphase, a gradient of Aurora B activity centered on the central spindle is still able to phosphorylate kinetochore substrates such as Dsn1 to modulate kinetochore stability in anaphase and to regulate kinetochore disassembly as cells enter telophase. We provide a model to explain how Aurora B co-operates with Cyclin B-Cdk1 to maintain kinetochore function in anaphase. Central spindle Aurora B targets kinetochore substrates in anaphase Phosphorylation of Dsn1 by Aurora B stabilizes kinetochores in anaphase Dsn1 phosphorylation modulates chromosome movements in anaphase Kinetochores assemble on chromosomes in mitosis to allow accurate chromosome segregation. Papini et al. find that, although Aurora B leaves centromeres at anaphase, an Aurora B activity gradient centered on the central spindle phosphorylates kinetochore substrates such as Dsn1 to modulate kinetochore stability and chromosome movements in anaphase.
DOI: 10.3390/biology6010015
发表时间: 2017-02-17
期刊: Biology
影响因子: 4.2
作者:
Asbury CL
通讯作者: Asbury CL
DOI: 10.1083/jcb.201301006
发表时间: 2013-04-01
期刊: The Journal of cell biology
影响因子: --
作者:
Gascoigne KE;Cheeseman IM
通讯作者: Cheeseman IM
DOI: 10.1126/science.1251121
发表时间: 2014-07-18
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Afonso O;Matos I;Pereira AJ;Aguiar P;Lampson MA;Maiato H
通讯作者: Maiato H
DOI: 10.1038/nature06923
发表时间: 2008-06-19
期刊: NATURE
影响因子: 64.8
作者:
Fuller, Brian G.;Lampson, Michael A.;Kapoor, Tarun M.
通讯作者: Kapoor, Tarun M.
DOI: 10.1083/jcb.201407074
发表时间: 2015-01-19
期刊: The Journal of cell biology
影响因子: --
作者:
Kim S;Yu H
通讯作者: Yu H