Crosstalk of Synapsin1 palmitoylation and phosphorylation controls the dynamicity of synaptic vesicles in neurons.

Crosstalk of Synapsin1 palmitoylation and phosphorylation controls the dynamicity of synaptic vesicles in neurons.
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Synapsin1 棕榈酰化和磷酸化的串扰控制神经元突触小泡的动态

DOI:
10.1038/s41419-022-05235-4
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发表时间:
2022-09-12
影响因子:
9
通讯作者:
Kong, Eryan
Kong, Eryan
中科院分区:
生物学1区
文献类型:
--
作者:
Yan, Peipei;Liu, Huicong;Zhou, Tao;Sun, Pu;Wang, Yilin;Wang, Xibin;Zhang, Lin;Wang, Tian;Dong, Jing;Zhu, Jiangli;Lv, Luxian;Li, Wenqiang;Qi, Shiqian;Liang, Yinming;Kong, Eryan

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突触囊泡(SV)在突触前域的动力学受到突触蛋白1磷酸化的严格控制,然而,突触蛋白1与F-肌动蛋白或SV锚定的机制尚未完全理解。在这里,我们发现Syn 1被蛋白质棕榈酰化修饰,并且检查Syn 1棕榈酰化在神经元中的作用使我们发现Syn 1棕榈酰化受到其磷酸化的负调控;它们一起操纵SV的聚集和再分布。使用电子显微镜和遗传学的结合方法,我们发现,Syn 1棕榈酰化是至关重要的,它与F-肌动蛋白的结合,但不是SV。Syn 1棕榈酰化的抑制导致SV聚集缺陷和体内总SV数量减少。我们提出了一个模型,在该模型中,SV的再分布是由上调的Syn 1磷酸化和下调的Syn 1棕榈酰化,它们可逆地促进SV集群。因此,Syn 1棕榈酰化和磷酸化的串扰双向操纵神经元中的SV动力学。
The dynamics of synaptic vesicles (SVs) within presynaptic domains are tightly controlled by synapsin1 phosphorylation; however, the mechanism underlying the anchoring of synapsin1 with F-actin or SVs is not yet fully understood. Here, we found that Syn1 is modified with protein palmitoylation, and examining the roles of Syn1 palmitoylation in neurons led us to uncover that Syn1 palmitoylation is negatively regulated by its phosphorylation; together, they manipulate the clustering and redistribution of SVs. Using the combined approaches of electron microscopy and genetics, we revealed that Syn1 palmitoylation is vital for its binding with F-actin but not SVs. Inhibition of Syn1 palmitoylation causes defects in SVs clustering and a reduced number of total SVs in vivo. We propose a model in which SVs redistribution is triggered by upregulated Syn1 phosphorylation and downregulated Syn1 palmitoylation, and they reversibly promote SVs clustering. The crosstalk of Syn1 palmitoylation and phosphorylation thereby bidirectionally manipulates SVs dynamics in neurons.
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