METTL9 主要通过非催化功能维持脊椎动物的神经发育
Azzurra Codino1, Luca Spagnoletti1, Claudia Olobardi2
1Istituto Italiano di Tecnologia (IIT), Center for Human Technologies, Via Enrico Melen 83, 16152, Genoa, Italy.
Nature communications
|July 31, 2025
概括
METTL9蛋白对于脊椎动物的神经发育至关重要,独立于其催化功能. 它维持了分泌系统,对神经发生是必不可少的.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 神经科学是一个神经科学.
背景情况:
- 在蛋白质中,METTL9催化了histidine残留物 (1MH) 的N1甲基化.
- 在脊椎动物的神经系统中,METTL9的表达很高.
- METTL9在神经发育延迟中的作用表明神经发育中的功能.
研究的目的:
- 研究METTL9在神经发育中的作用.
- 确定METTL9的催化活性是否对其在神经发生中的功能至关重要.
- 阐明METTL9影响神经发育的分子机制.
主要方法:
- 产生了Mettl9淘汰,可诱导的Degron和催化不活跃的突变小鼠胚胎干细胞系.
- 评估工程细胞系的神经分化能力.
- 在Xenopus laevis胚胎下调的培养和分析的神经发育.
主要成果:
- METTL9在支持脊椎动物神经发生过程中起着保留的作用.
- 这一功能在很大程度上独立于METTL9的催化活性.
- METTL9调节分泌途径,与细胞运输,内细胞分裂和戈尔吉完整性的调节者相互作用.
结论:
- 在神经发生过程中,METTL9具有关键的发育功能.
- 这一功能是由1MH独立的途径介导的,该途径涉及维护分泌系统.
- 由METTL9支持的分泌系统的完整性对于神经发育至关重要.
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