Right place, right time - Spatial guidance of neuronal morphogenesis by septin GTPases.

Right place, right time - Spatial guidance of neuronal morphogenesis by septin GTPases.
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DOI:
10.1016/j.conb.2022.102557
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发表时间:
2022-08
影响因子:
5.7
通讯作者:
--
中科院分区:
医学2区
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神经元的形态发生是由外向内的信号和由内而外的机制引导的,这需要时空精度。神经元形态发生的细胞内机制是如何时空控制的还不清楚。Septins包含一个独特的GTdR模块,该模块由具有不同定位和功能的复合物组成。分隔蛋白在神经前体细胞中划分不同的膜区域,定向细胞分裂的轴和神经突形成的位点。通过控制膜和细胞骨架蛋白的定位,septins促进轴突树突的形成和极性。此外,隔蛋白调节突触前末梢的囊泡胞吐作用,并以磷酸调节的方式稳定树突棘和突触后密度。我们认为,神经元septins的拓扑结构和功能专门的时空调节神经元的形态发生和可塑性。
Neuronal morphogenesis is guided by outside-in signals and inside-out mechanisms, which require spatiotemporal precision. How the intracellular mechanisms of neuronal morphogenesis are spatiotemporally controlled is not well understood. Septins comprise a unique GTPase module, which consists of complexes with differential localizations and functions. Septins demarcate distinct membrane domains in neural precursor cells, orienting the axis of cell division and the sites of neurite formation. By controlling the localization of membrane and cytoskeletal proteins, septins promote axon-dendrite formation and polarity. Furthermore, septins modulate vesicle exocytosis at pre-synaptic terminals, and stabilize dendritic spines and post-synaptic densities in a phospho-regulatable manner. We posit that neuronal septins are topologically and functionally specialized for the spatiotemporal regulation of neuronal morphogenesis and plasticity.
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