Stu2 promotes mitotic spindle elongation in anaphase.

Stu2 promotes mitotic spindle elongation in anaphase.
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DOI:
10.1083/jcb.153.2.435
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发表时间:
2001-04-16
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Hyman T
Hyman T
中科院分区:
其他
文献类型:
--
作者:
Severin F;Habermann B;Huffaker T;Hyman T

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在分裂后期,有丝分裂纺锤体伸长到中期长度的5倍。这个过程被称为后期B,对于正确的染色体分离是必不可少的。在这里,我们研究了在萌芽酵母酿酒酵母后期纺锤体长度的控制。我们发现,后期的微管稳定需要微管相关蛋白Stu2。我们进一步表明,Stu2的活性与Kinesin相关蛋白Kip3的活性相反。对Kinesin同源树的重新检查表明,KIP3是驱动蛋白的微管不稳定亚家族(Kin I)的酿酒酵母同源基因。我们的结论是,在进化上保守的微管稳定因子和微管破坏因子之间的活性平衡对于B后期正确的纺锤体伸长是必不可少的。
During anaphase, mitotic spindles elongate up to five times their metaphase length. This process, known as anaphase B, is essential for correct segregation of chromosomes. Here, we examine the control of spindle length during anaphase in the budding yeast Saccharomyces cerevisiae. We show that microtubule stabilization during anaphase requires the microtubule-associated protein Stu2. We further show that the activity of Stu2 is opposed by the activity of the kinesin-related protein Kip3. Reexamination of the kinesin homology tree suggests that KIP3 is the S. cerevisiae orthologue of the microtubule-destabilizing subfamily of kinesins (Kin I). We conclude that a balance of activity between evolutionally conserved microtubule-stabilizing and microtubule-destabilizing factors is essential for correct spindle elongation during anaphase B.
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发表时间: 1992-09-01
影响因子: 10.5
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