The spindle pole-body localization of activated cytoplasmic dynein is cell cycle-dependent in Aspergillus nidulans.

The spindle pole-body localization of activated cytoplasmic dynein is cell cycle-dependent in Aspergillus nidulans.
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DOI:
10.1016/j.fgb.2021.103519
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发表时间:
2021-03
期刊:
Fungal genetics and biology : FG & B
影响因子:
--
通讯作者:
Egan MJ
Egan MJ
中科院分区:
其他
文献类型:
--
作者:
Bieger BD;Osmani AH;Xiang X;Egan MJ

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细胞质动力蛋白是一种负末端导向的微管马达,可以被货物衔接子激活。在构巢曲霉中,ΔC-HookA的过表达,即早期内体衔接子HookA缺失其货物结合位点,导致激活的动力蛋白在微管组织中心所在的隔膜和纺锤体极体(SPB)处积累。有趣的是,只有一些间期核显示动力蛋白的SPB信号。在这里,我们提出的数据表明,在SPBs激活的动力蛋白的本地化是细胞周期依赖性的:SPB动力蛋白信号被认为是与细胞核在早期G1,但消失在约G1-S边界。
Cytoplasmic dynein is a minus end-directed microtubule motor that can be activated by cargo adapters. In Aspergillus nidulans, overexpression of ΔC-HookA, the early endosomal adapter HookA missing its cargo-binding site, causes activated dynein to accumulate at septa and spindle pole bodies (SPBs) where the microtubule-organizing centers are located. Intriguingly, only some interphase nuclei show SPB signals of dynein. Here we present data demonstrating that localization of the activated dynein at SPBs is cell cycle-dependent: SPB dynein signals are seen to associate with nuclei at early G1 but disappear at about the G1-S boundary.
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