发动蛋白-1的脯氨酸和精氨酸富集域功能域与大鼠神经突触小体相互作用蛋白的筛选及鉴定

彭镜;张慈柳;李玉飞;吴蕾;何芳;邓小鹿;尹飞 

解剖学报 ›› 2012, Vol. 43 ›› Issue (5) : 588-593.

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解剖学报 ›› 2012, Vol. 43 ›› Issue (5) : 588-593. DOI: 10.3969/j.issn.0529-1356.2012.05.002
神经生物学

发动蛋白-1的脯氨酸和精氨酸富集域功能域与大鼠神经突触小体相互作用蛋白的筛选及鉴定

  • 彭镜1; 张慈柳1; 李玉飞2; 吴蕾1; 何芳1; 邓小鹿1; 尹飞1*
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Screening and identification interaction proteins of dynamin-1 PRD functional domain in rat brain synaptosome

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Abstract

Objective Synaptic vesicles complete of synaptic vesicles cycle by exocytosis and endocytosis. The retrieval of synaptic vesicle membrane after exocytosis is essential for the maintenance of synaptic transmission in central nervous system synapses. Dynamin-1 is a 96kD multidomain GTPase enzyme that is crucial for the fission stage of synaptic vesicle recycling and vesicle traffick. Several models range from viewing Dynamin-1 strictly as a mechanochemical enzyme to considering it as a regulatory protein for the recruitment of the downstream binding partners responsible for scission. To address the role of Dynamin-1 and its interaction proteins in synaptic vesicle endocytosis, we screened and identified interaction proteins of Dynamin-1 PRD functional domain in rat brain synaptosomes. Methods pGEX-4T-2-PRD, a prokaryotic expression plasmid of PRD functional domain, was constructed into Dynamin-1. GST-PRD fusion proteins were obtained by Escherichia coli (E.coli) expression system combined glutathione agarose purified column. Rat brain synaptosomal fractions were isolated by ultracentrifugation. Glutathione S-transferase(GST) pull-down assay was employed to screen interaction proteins between rat brain synaptosome and GST-PRD fusion proteins. Subsequently, these proteins were identified using liquid chromatography spectroscopy (LC-MS). Result We successfully purified the GST-PRD fusion proteins and extracted rat brain synaptosome. Thirty-five interaction proteins of Dynamin-1 PRD functional domain in rat synaptosome were isolated and identified, consisting of synaptic vesicle-associated proteins, cytoskeletal proteins, metabolic enzymes and other proteins. Conclusion Here we reported a comprehensive set of candidate proteins that are closely related to synaptic vesicle recycling. The study has laid the foundation for clarifying the function, regulatory mechanism of Dynamin-1 and cracking the pathway/protein network of synaptic vesicle recycling.

关键词

神经突触小体 / 发动蛋白-1 / 脯氨酸和精氨酸富集域 / 突触囊泡循环 / 液相质谱 / 大鼠

Key words

Brain synaptosome / Dynamin-1 / PRD functional domain / Synaptic vesicle recycling / Liquid chromatography / Rat

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彭镜;张慈柳;李玉飞;吴蕾;何芳;邓小鹿;尹飞 . 发动蛋白-1的脯氨酸和精氨酸富集域功能域与大鼠神经突触小体相互作用蛋白的筛选及鉴定[J]. 解剖学报. 2012, 43(5): 588-593 https://doi.org/10.3969/j.issn.0529-1356.2012.05.002
Screening and identification interaction proteins of dynamin-1 PRD functional domain in rat brain synaptosome[J]. Acta Anatomica Sinica. 2012, 43(5): 588-593 https://doi.org/10.3969/j.issn.0529-1356.2012.05.002
中图分类号: Q189   

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