Nessun Dorma, a novel centralspindlin partner, is required for cytokinesis in Drosophila spermatocytes.

Nessun Dorma, a novel centralspindlin partner, is required for cytokinesis in Drosophila spermatocytes.
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DOI:
10.1083/jcb.201007060
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发表时间:
2010-12-27
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
D'Avino PP
D'Avino PP
中科院分区:
其他
文献类型:
--
作者:
Montembault E;Zhang W;Przewloka MR;Archambault V;Sevin EW;Laue ED;Glover DM;D'Avino PP

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Nessun Dorma是环管的一个组成部分,具有多糖结合结构域,其对于雄性减数分裂期间的胞质分裂是重要的。胞质分裂是细胞分裂的最后一步,通常以两个子细胞的分裂而结束。然而,在某些组织中,子细胞从未完全分离,并通过细胞间桥或环管保持相互连接。在本文中,我们报告的识别和分析的一种新的环管组件,Nessun Dorma(Nesd),作为一个进化保守的合作伙伴的centralspindlin复杂,胞质分裂的关键调节分离。Nesd含有一个果胶裂解酶样结构域,在蛋白质中发现,结合多糖,我们提出的证据表明,它具有高亲和力的β-半乳糖苷在体外。此外,nesd是黑腹果蝇的一个必需基因,在雄性减数分裂和雌性生殖细胞中,它是完成胞质分裂所必需的。我们的研究结果表明,Nesd是一种新型的碳水化合物结合蛋白,在后期的胞质分裂中与centralspindlin一起发挥作用,从而突出了糖基化在这一过程中的重要性。
Nessun Dorma is a component of the ring canal with a polysaccharide-binding domain, which is important for cytokinesis during male meiosis. Cytokinesis, the final step of cell division, usually ends with the abscission of the two daughter cells. In some tissues, however, daughter cells never completely separate and remain interconnected by intercellular bridges or ring canals. In this paper, we report the identification and analysis of a novel ring canal component, Nessun Dorma (Nesd), isolated as an evolutionarily conserved partner of the centralspindlin complex, a key regulator of cytokinesis. Nesd contains a pectin lyase–like domain found in proteins that bind to polysaccharides, and we present evidence that it has high affinity for β-galactosides in vitro. Moreover, nesd is an essential gene in Drosophila melanogaster, in which it is required for completion of cytokinesis during male meiosis and possibly in female germline cells. Our findings indicate that Nesd is a novel carbohydrate-binding protein that functions together with centralspindlin in late cytokinesis, thus highlighting the importance of glycosylation in this process.
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