神经元中突触核信使CRTC1的细胞质和核蛋白相互作用网络揭示了CREB1和CRTC1,MEF2C和RFX3之间的合作性染色体结合
Sylvia Neumann1, Jennifer M Achiro1, Marika Watanabe1
1Department of Biological Chemistry, David Geffen School of Medicine, UCLA.
bioRxiv : the preprint server for biology
|July 9, 2025
概括
谷氨酸刺激促使神经元中CRTC1的运动,揭示了它在调节CREB1和MEF2C和RFX3.3等其他因素的基因转录中的作用.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 活动依赖基因转录对于神经元功能和可塑性至关重要.
- 众所周知,CRTC1 (CREB受调转录协激活剂1) 在氨基激素刺激时转移到核中,激活CREB1向基因.
- CRTC1的更广泛的作用及其与神经元中其他转录因子的相互作用在很大程度上仍未被探索.
研究的目的:
- 在神经元细胞质和细胞核中无偏见地识别CRTC1相互作用蛋白.
- 阐明CRTC1和CREB1调节活动依赖转录的机制.
- 为了研究CRTC1在CREB1激活之外的作用.
主要方法:
- 近距离标记 (BioID) 用于识别动物前脑神经元的细胞质和核部分与CRTC1相互作用的蛋白质.
- 染色体免疫沉测序 (ChIP-seq) 用于分析CREB1和CRTC1与染色体的结合.
- 在活动依赖增强剂中对转录因子模式的分析.
主要成果:
- 细胞质CRTC1相互作用组揭示了突触可塑性信号通路的参与.
- 核CRTC1相互作用组确定了转录因子,染色质修饰剂和拼接因子.
- 发现CRTC1和CREB1与MEF2C和RFX3转录因子以活动依赖的方式相互作用.
- 谷氨基激素刺激诱导CRTC1和CREB1对富含MEF2C和RFX3基因的增强剂进行招募,而CREB1已经与bZIP基因结合.
结论:
- CRTC1在神经元的细胞质和核两部分都起着重要作用.
- 在响应突触活动时,CRTC1促进了CREB1和其他转录因子 (MEF2C,RFX3) 之间的合作.
- 这项研究增强了对神经元中活动依赖基因调节的基础分子机制的理解.
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