The REN4 rheostat dynamically coordinates the apical and lateral domains of Arabidopsis pollen tubes.

The REN4 rheostat dynamically coordinates the apical and lateral domains of Arabidopsis pollen tubes.
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REN4 变阻器动态协调拟南芥花粉管的顶端和侧向区域

DOI:
10.1038/s41467-018-04838-w
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发表时间:
2018-07-03
影响因子:
16.6
通讯作者:
Yang Z
Yang Z
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li H;Luo N;Wang W;Liu Z;Chen J;Zhao L;Tan L;Wang C;Qin Y;Li C;Xu T;Yang Z

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质膜(PM)中极性结构域的动态维持对许多基本过程至关重要,例如极性细胞生长和生长引导,但仍然缺乏表征。拟南芥花粉管的顶端快速生长需要活跃的ROP1 GTPase动态分布到顶域。在这里,我们发现网格蛋白介导的内吞作用(CME)协调了外侧REN4和顶端ROP1信号。REN4与活性ROP1相互作用,但相互拮抗。REN4也与CME组件相互作用和共定位,但表现出与CME相反的作用,从PM中去除REN4和活性ROP1。数学模型表明,REN4抑制了主动ROP1的空间分布,对极性控制的鲁棒性至关重要。因此,我们的研究结果表明,REN4作为一个时空变阻器,通过与ROP1相互作用,启动它们被CME从PM中移除,从而在尖端快速生长过程中协调顶端和外侧结构域之间的动态划分。
The dynamic maintenance of polar domains in the plasma membrane (PM) is critical for many fundamental processes, e.g., polar cell growth and growth guidance but remains poorly characterized. Rapid tip growth of Arabidopsis pollen tubes requires dynamic distribution of active ROP1 GTPase to the apical domain. Here, we show that clathrin-mediated endocytosis (CME) coordinates lateral REN4 with apical ROP1 signaling. REN4 interacted with but antagonized active ROP1. REN4 also interacts and co-localizes with CME components, but exhibits an opposite role to CME, which removes both REN4 and active ROP1 from the PM. Mathematical modeling shows that REN4 restrains the spatial distribution of active ROP1 and is important for the robustness of polarity control. Hence our results indicate that REN4 acts as a spatiotemporal rheostat by interacting with ROP1 to initiate their removal from the PM by CME, thereby coordinating a dynamic demarcation between apical and lateral domains during rapid tip growth.
DOI: 10.1105/tpc.105.036434
发表时间: 2006-02-01
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影响因子: 11.6
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