Interphase centrosome organization by the PLP-Cnn scaffold is required for centrosome function.

Interphase centrosome organization by the PLP-Cnn scaffold is required for centrosome function.
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DOI:
10.1083/jcb.201503117
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发表时间:
2015-07-06
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Rusan NM
Rusan NM
中科院分区:
其他
文献类型:
--
作者:
Lerit DA;Jordan HA;Poulton JS;Fagerstrom CJ;Galletta BJ;Peifer M;Rusan NM

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Cnn和PLP在两个确定的位点直接相互作用,以协调中心体的细胞周期依赖性重排和支架活性,从而允许正常的中心体组织、细胞分裂和胚胎存活。中心粒周围物质(PCM)介导微管(MT)成核和中心体的锚定活动。由中心体蛋白(Cnn)组织的支架用于确保每个细胞周期中中心体活性的适当PCM结构和功能变化。在这里,我们调查的机制,空间限制和时间协调中心体支架的形成。专注于有丝分裂到间期过渡的果蝇胚胎,我们表明,制定的间期Cnn支架定义了一个主要的中心体结构重排。我们确定了一个前所未有的作用Pericentrin样蛋白(PLP),它定位于扩展的Cnn耀斑的尖端,以保持强大的间期中心体活性,并促进形成所需的正常核间距,中心体分离,和区室化的合胞体胚胎的间期MT星。我们的数据显示,Cnn和PLP直接相互作用在两个定义的网站,以协调中心体的细胞周期依赖性重排和支架活性,以允许正常的中心体组织,细胞分裂和胚胎活力。
Cnn and PLP directly interact at two defined sites to coordinate the cell cycle–dependent rearrangement and scaffolding activity of the centrosome to permit normal centrosome organization, cell division, and embryonic viability. Pericentriolar material (PCM) mediates the microtubule (MT) nucleation and anchoring activity of centrosomes. A scaffold organized by Centrosomin (Cnn) serves to ensure proper PCM architecture and functional changes in centrosome activity with each cell cycle. Here, we investigate the mechanisms that spatially restrict and temporally coordinate centrosome scaffold formation. Focusing on the mitotic-to-interphase transition in Drosophila melanogaster embryos, we show that the elaboration of the interphase Cnn scaffold defines a major structural rearrangement of the centrosome. We identify an unprecedented role for Pericentrin-like protein (PLP), which localizes to the tips of extended Cnn flares, to maintain robust interphase centrosome activity and promote the formation of interphase MT asters required for normal nuclear spacing, centrosome segregation, and compartmentalization of the syncytial embryo. Our data reveal that Cnn and PLP directly interact at two defined sites to coordinate the cell cycle–dependent rearrangement and scaffolding activity of the centrosome to permit normal centrosome organization, cell division, and embryonic viability.
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影响因子: 3.3
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