Microtubule motors in eukaryotic spindle assembly and maintenance.

Microtubule motors in eukaryotic spindle assembly and maintenance.
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DOI:
10.1016/j.semcdb.2010.01.015
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发表时间:
2010-05
影响因子:
7.3
通讯作者:
Bloom K
Bloom K
中科院分区:
生物学2区
文献类型:
--
作者:
Gatlin JC;Bloom K

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有丝分裂纺锤体的主要功能是在细胞分裂过程中准确地分离复制的染色体。这种动态的、基于微管的结构由分裂细胞组装,并促进染色体的协调运动,这是有丝分裂的标志。对于特定类型的细胞,稳态纺锤体大小和形态相对恒定,但从一种细胞类型到下一种细胞类型变化很大。尽管存在这些差异,但所有真核生物的纺锤体都具有基本的结构相似性,其中最重要的可能是双极对称性。组装双极纺锤体的核心是一个机械过程,需要动态微管被移动和排列,以实现某种最终的功能形式。这些运动是由微管聚合物动力学或分子马达产生的力的结果。在这篇综述中,我们特别关注的电机依赖的机制,形状的纺锤体和推迟更全面的治疗纺锤体组装和其他电机功能在有丝分裂给别人。
The main function of the mitotic spindle is to accurately segregate replicated chromosomes during cell division. This dynamic, microtubule-based structure is assembled by a dividing cell and facilitates the orchestrated movement of chromosomes that is the hallmark of mitosis. Steady-state spindle size and morphology are relatively constant for cells of a specified type but vary considerably from one cell type to the next. Despite these differences, all eukaryotic spindles share basic architectural similarities, perhaps the most important of which is bipolar symmetry. At its core, assembling a bipolar spindle is a mechanical process that requires dynamic microtubules be moved and arranged to realize some ultimate functional form. These movements are the result of forces generated either by microtubule polymer dynamics or molecular motors. In this review we focus specifically on the motor-dependent mechanisms that shape the spindle and defer a more comprehensive treatment of spindle assembly and other motor functions during mitosis to others.
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