微管架构将AMOT稳定性与YAP/TAZ机械传导和Hippo信号连接起来
Giada Vanni1, Anna Citron1, Ambela Suli1
1Department of Molecular Medicine, University of Padova, Padova, Italy.
Nature cell biology
|October 1, 2025
概括
微管在机械应力时重组,降解AMOT蛋白质以控制YAP/TAZ活动. 这揭示了细胞机械传导和癌症发展的新机制.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 分子生物学分子生物学
背景情况:
- 细胞机械转导,即细胞将机械刺激转化为生物化学信号的过程,对于细胞功能至关重要,但人们对其了解甚少.
- 微管,动蛋白和核外是细胞机械感应机械的关键组成部分.
研究的目的:
- 阐明微管在细胞机械传导中的作用.
- 确定将机械线索与YAP/TAZ活动调节的分子机制.
- 调查AMOT蛋白质和Hippo通路在这一过程中的参与.
主要方法:
- 研究了微管的重组,以应对机械激活.
- 使用蛋白质降解试验来研究AMOT蛋白质的稳定性.
- 研究了AMOT与YAP/TAZ和Hippo通路组件的相互作用.
- 评估了AMOT损失对细胞机械敏感性的影响.
- 研究了Ras/RTK瘤基因在YAP/TAZ驱动的瘤发生中的作用.
主要成果:
- 机械激活会诱导微管的重组,从周核到辐射阵列.
- 这种重新排列触发了AMOT蛋白质的降解,这些蛋白质隔离了YAP/TAZ.
- AMOT 蛋白质的稳定性由机械状态调节,并由微管,dynein/dynactin 和蛋白质酶介导.
- 丢失AMOT使细胞对机械变化不敏感,而瘤基因破坏了这个检查点.
- 河马通路通过LATS激酶间接地通过稳定AMOT来抑制YAP/TAZ.
结论:
- AMOT蛋白稳定性是连接细胞骨动力学,Hippo信号和YAP/TAZ机械传导的中心枢纽.
- 微管子介导的AMOT降解是调节YAP/TAZ活动以响应机械线索的关键机制.
- 这种AMOT中心检查点的失调有助于YAP/TAZ驱动的瘤发生.
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