Targeting of Fzr/Cdh1 for timely activation of the APC/C at the centrosome during mitotic exit.

Targeting of Fzr/Cdh1 for timely activation of the APC/C at the centrosome during mitotic exit.
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DOI:
10.1038/ncomms12607
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发表时间:
2016-08-25
影响因子:
16.6
通讯作者:
Kimata Y
Kimata Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Meghini F;Martins T;Tait X;Fujimitsu K;Yamano H;Glover DM;Kimata Y

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一种多亚基泛素连接酶,后期促进复合物/细胞周期体(APC/C),调节包括细胞周期在内的关键细胞过程。为了实现其多种功能,APC/C活动必须在时间和空间上进行精确调节。间期APC/C激活剂Fizzy-related(Fzr或Cdh 1)位于动物细胞的中心体。然而,其本地化的机制及其重要性都不清楚。在这里,我们确定了中心体组件Spd 2作为FZR在果蝇的主要合作伙伴。Fzr在间期的中心粒定位依赖于与Spd 2的直接相互作用。通过产生不能结合Fzr的Spd 2突变体,我们表明Fzr的中心体定位对于APC/C向其中心体底物Aurora A的最佳活化是必需的。最后,我们表明,Spd 2也是一种新的APC/CFZr基板。我们的研究是第一次证明APC/C激活剂的不同亚细胞池在APC/C活性的时空控制中的至关重要性。 后期促进复合物/环体(APC/C)的活性需要在时间和空间上进行调节以执行不同的功能。在这里,作者表明Spd 2将APC/C激活剂Fzr定位在中心体,以促进最佳APC/C活性朝向其中心体底物Aurora A。
A multi-subunit ubiquitin ligase, the anaphase-promoting complex/cyclosome (APC/C), regulates critical cellular processes including the cell cycle. To accomplish its diverse functions, APC/C activity must be precisely regulated in time and space. The interphase APC/C activator Fizzy-related (Fzr or Cdh1) is localized at centrosomes in animal cells. However, neither the mechanism of its localization nor its importance is clear. Here we identify the centrosome component Spd2 as a major partner of Fzr in Drosophila. The localization of Fzr to the centriole during interphase depends on direct interaction with Spd2. By generating Spd2 mutants unable to bind Fzr, we show that centrosomal localization of Fzr is essential for optimal APC/C activation towards its centrosomal substrate Aurora A. Finally, we show that Spd2 is also a novel APC/CFzr substrate. Our study is the first to demonstrate the critical importance of distinct subcellular pools of APC/C activators in the spatiotemporal control of APC/C activity. The activity of the anaphase-promoting complex/cyclosome (APC/C) needs to be regulated in time and space to perform different functions. Here the authors show that Spd2 localizes the APC/C activator Fzr at the centrosomes to promote optimal APC/C activity towards its centrosomal substrate Aurora A.
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