Dynamic SUMO modification regulates mitotic chromosome assembly and cell cycle progression in Caenorhabditis elegans.

Dynamic SUMO modification regulates mitotic chromosome assembly and cell cycle progression in Caenorhabditis elegans.
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DOI:
10.1038/ncomms6485
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发表时间:
2014-12-05
影响因子:
16.6
通讯作者:
Hay, Ronald T.
Hay, Ronald T.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pelisch, Federico;Sonneville, Remi;Pourkarimi, Ehsan;Agostinho, Ana;Blow, J. Julian;Gartner, Anton;Hay, Ronald T.

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小泛素样修饰剂 (SUMO) 最初被定性为编码着丝粒蛋白 MIF2 的基因突变的抑制因子,参与细胞周期调节的许多方面。结合和解结合的动力学以及 SUMO 在细胞周期中的作用仍有待探索。在这里,我们使用秀丽隐杆线虫来确定 SUMO 对及时准确的细胞分裂的贡献。染色质相关的 SUMO 结合物在中期增加,但在后期迅速减少。 SUMO 缀合物在中期板上的积累和正确的染色体排列取决于 SUMO E2 缀合酶 UBC-9 和 SUMO E3 连接酶 PIASGEI-17。解偶联是通过 SUMO 蛋白酶 ULP-4 实现的,对于细胞周期的正确进展至关重要。此外,ULP-4 对于从染色质中提取 Aurora BAIR-2 并将其重新定位到纺锤体中部区域是必需的。我们的结果表明动态 SUMO 缀合在细胞周期进展中发挥作用。 泛素样修饰剂 SUMO 参与细胞周期的许多方面,但其在有丝分裂过程中的动态尚不清楚。在这里,佩里施等人。使用秀丽隐杆线虫表明 SUMO 在中期板上积累,并且是正确染色体排列所必需的,并且需要解结合才能完成细胞周期。
The small ubiquitin-like modifier (SUMO), initially characterized as a suppressor of a mutation in the gene encoding the centromeric protein MIF2, is involved in many aspects of cell cycle regulation. The dynamics of conjugation and deconjugation and the role of SUMO during the cell cycle remain unexplored. Here we used Caenorhabditis elegans to establish the contribution of SUMO to a timely and accurate cell division. Chromatin-associated SUMO conjugates increase during metaphase but decrease rapidly during anaphase. Accumulation of SUMO conjugates on the metaphase plate and proper chromosome alignment depend on the SUMO E2 conjugating enzyme UBC-9 and SUMO E3 ligase PIASGEI-17. Deconjugation is achieved by the SUMO protease ULP-4 and is crucial for correct progression through the cell cycle. Moreover, ULP-4 is necessary for Aurora BAIR-2 extraction from chromatin and relocation to the spindle mid-zone. Our results show that dynamic SUMO conjugation plays a role in cell cycle progression. The ubiquitin-like modifier SUMO is involved in many aspects of the cell cycle, but its dynamics during mitosis are unknown. Here, Pelisch et al. use C. elegans to show that SUMO accumulates on the metaphase plate and is required for proper chromosome alignment, and deconjugation is required to progress through the cell cycle.
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