一个保存的RNA开关,用于乙胆受体聚合在神经肌肉结节在状动物
Md Faruk Hossain1, Sydney Popsuj2, Burcu Vitrinel3
1Department of Biological Sciences, St. John's University, New York, NY, USA.
bioRxiv : the preprint server for biology
|July 15, 2024
概括
RNA结合蛋白Nova1/2对于哺乳动物中的乙胆受体 (AChR) 聚类至关重要. 这项研究揭示了Ciona robusta中保存的通路,突出了Nova.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 哺乳动物的神经肌肉突触的形成取决于乙胆受体 (AChR) 聚类.
- 这种聚类由阿格林mRNA的替代拼接调节,由Nova1/2RNA结合蛋白介导.
- 诺瓦1/2确保将Z外子纳入Agrin,促进LRp4受体结合和随后的ACHR聚类.
研究的目的:
- 研究非脊椎动物状动物Ciona robusta.中Agrin替代拼接途径的保护.
- 确定Ciona Nova在Agrin Z外型纳入和ACHR聚类中的作用.
- 探索Nova结构-功能及其跨物种的调节网络的差异.
主要方法:
- 在体内特定于Ciona robusta的CRISPR/Cas9介导的组织突变.
- 在培养的哺乳动物细胞中进行异质迷你基因替代拼接试验.
- 对转录因子Ebf在Ciona Nova表达中的作用的分析.
主要成果:
- 在Ciona robusta中,由Nova调解的Agrin Z外因子包容途径是保留的.
- Ciona Nova对于Agrin Z外体的包含和ACHR聚类是必要的和足够的.
- 在Ciona和哺乳动物之间观察到Nova结构功能上的差异.
- 转录因子Ebf激活了Ciona运动神经元中的Nova表达.
结论:
- 调节神经肌肉突触形成的Agrin替代拼接的基本机制是从长袍动物到哺乳动物的进化保存.
- 新型蛋白质作为关键调节者,尽管结构的变化,这种保存途径.
- 这些发现将RNA拼接调节与一个保存的转录网络联系起来,其中涉及EBF在运动神经元发育中的作用.
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