Systematic kinetic analysis of mitotic dis- and reassembly of the nuclear pore in living cells.

Systematic kinetic analysis of mitotic dis- and reassembly of the nuclear pore in living cells.
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DOI:
10.1083/jcb.200707026
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发表时间:
2008-03-10
影响因子:
7.8
通讯作者:
Ellenberg, Jan
Ellenberg, Jan
中科院分区:
生物学1区
文献类型:
--
作者:
Dultz, Elisa;Zanin, Esther;Wurzenberger, Claudia;Braun, Marion;Rabut, Gwenael;Sironi, Lucia;Ellenberg, Jan

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在高等真核生物有丝分裂过程中,核孔复合体(NPC)在前期解体,在后期和末期重建。NPC的形成被假设为通过有丝分裂稳定的亚复合物的相互作用而发生,所述亚复合物形成确定的结构中间体。为了确定导致有丝分裂过程中功能NPC的分解和重组的事件序列,我们在这里提出了基于单分裂细胞的共聚焦延时显微镜的定量分析。我们使用该测定系统地研究了8个核孔蛋白亚复合物相对于NRK细胞核运输的分解和重组动力学,将NPC的组装状态与其功能联系起来。我们的数据表明,NPC组装是一个有序的逐步过程,导致进口功能已经处于部分组装状态。此外,我们发现,核孔蛋白解离不发生在相反的顺序从组装过程中的结合,这可能表明一个独特的机制。
During mitosis in higher eukaryotes, nuclear pore complexes (NPCs) disassemble in prophase and are rebuilt in anaphase and telophase. NPC formation is hypothesized to occur by the interaction of mitotically stable subcomplexes that form defined structural intermediates. To determine the sequence of events that lead to breakdown and reformation of functional NPCs during mitosis, we present here our quantitative assay based on confocal time-lapse microscopy of single dividing cells. We use this assay to systematically investigate the kinetics of dis- and reassembly for eight nucleoporin subcomplexes relative to nuclear transport in NRK cells, linking the assembly state of the NPC with its function. Our data establish that NPC assembly is an ordered stepwise process that leads to import function already in a partially assembled state. We furthermore find that nucleoporin dissociation does not occur in the reverse order from binding during assembly, which may indicate a distinct mechanism.
DOI: 10.1083/jcb.200211076
发表时间: 2003-03-31
影响因子: 7.8
作者:
Lenart, Peter;Rabut, Gwenael;Daigle, Nathalie;Hand, Arthur R;Terasaki, Mark;Ellenberg, Jan
通讯作者: Ellenberg, Jan
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