KIS对抗PTBP2并调节神经元中的替代外子使用
Marcos Moreno-Aguilera1, Alba M Neher1, Mónica B Mendoza1
1Molecular Biology Institute of Barcelona (IBMB), CSIC, Barcelona, Spain.
eLife
|April 10, 2024
概括
剪接因子PTBP2的激酶 (KIS) 酸化在神经元分化过程中改变了全基因组的外因子使用. 这种翻译后控制影响突触发育,并揭示了神经生物学中的新机制.
科学领域:
- 分子和细胞神经科学
- 在RNA生物学,RNA生物学.
- 神经发育生物学 神经发育生物学
背景情况:
- 替代RNA拼接对于神经元分化和突触成熟至关重要.
- 拼接失调与神经退行性疾病有关.
- 控制神经元拼接调节者的分子机制在很大程度上是未知的.
研究的目的:
- 调查激酶KIS在调节神经元分化过程中的替代拼接中的作用.
- 阐明KIS控制拼接调节器的分子机制.
- 了解KIS和PTBP2相互作用对突触发育的功能影响.
主要方法:
- 在小鼠神经元分化过程中对全基因组外子使用变化的分析.
- 生物化学试验以确定 PTBP2 的 KIS 酸化及其对蛋白质相互作用的影响.
- 功能性研究评估了KIS和PTBP2对突触脊柱形成和成熟的影响.
主要成果:
- 激酶KIS在小鼠神经元分化过程中诱导出对子体使用的全基因组变化.
- 基因基因酶酸化PTBP2,破坏其与共同调节剂Matrin3和hNRNPM的相互作用,并损害RNA结合.
- KIS和PTBP2在突触脊柱的出现和成熟中表现出相反的作用.
结论:
- 一个新的翻译后调节机制控制神经元发育期间的拼接调节器.
- 通过KIS对PTBP2的激酶介导酸化将转录程序与替代的外因子使用联系起来.
- 这条通路对突触发育至关重要,可能与神经退行性疾病有关.
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