A secreted protein promotes cleavage furrow maturation during cytokinesis.

A secreted protein promotes cleavage furrow maturation during cytokinesis.
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DOI:
10.1016/j.cub.2010.12.006
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发表时间:
2011-01-25
期刊:
影响因子:
9.2
通讯作者:
Vogel, Bruce E.
Vogel, Bruce E.
中科院分区:
生物学1区
文献类型:
--
作者:
Xu, Xuehong;Vogel, Bruce E.

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Developmental modifications in cell shape depend on dynamic interactions between the extracellular matrix and cytoskeleton. In contrast, existing models of cytokinesis describe substantial cell surface remodeling that involves many intracellular regulatory and structural proteins but includes no contribution from the extracellular matrix. Here, we show that extracellular hemicentins assemble at the cleavage furrow of dividing cells in the C. elegans germline and in preimplantation mouse embryos. In the absence of hemicentin, cleavage furrows form but retract prior to completion, resulting in multinucleate cells. In addition to their role in tissue organization, the data indicate that hemicentins are the first secreted proteins required during mammalian development and the only known secreted proteins required for cytokinesis, with an evolutionarily conserved role in stabilizing and preventing retraction of nascent cleavage furrows. Together with studies showing that extracellular polysaccharides are required for cytokinesis in diverse species, our data suggest that assembly of a cell type-specific extracellular matrix may be a general requirement for cleavage furrow maturation and contractile ring function during cytokinesis.
秀丽隐杆线虫中新型软骨素蛋白多糖的鉴定:胚胎细胞分裂依赖于 CPG-1 和 CPG-2。
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