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基转移酶1通过mTORC1/AMPk信号传递调节p62驱动的自
Laura V Bonnet1,2, Anabela Palandri3,4, Jesica B Flores-Martin3,4
1Departamento de Química Biológica Ranwel Caputto, Universidad Nacional de Córdoba, Córdoba, Argentina. laurabonnet@unc.edu.ar.
Cell communication and signaling : CCS
|January 31, 2024
概括
甲基转移酶 (Ate1) 通过与p62集群并促进细胞清除,在自中发挥关键作用. 它的缺失过度激活mTORC1/AMPk信号,损害自流,导致基质积累.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 甲基转移酶 (Ate1) 调节蛋白质化,这是细胞蛋白解中的一个关键过程.
- 细胞利用全方位蛋白酶体系统 (UPS) 和宏自来进行蛋白质降解和恒温.
- 虽然N端 arginylation有助于UPS降解,但Ate1在p62-介导的自中的作用尚不清楚.
研究的目的:
- 阐明Arginyltransferase (Ate1) 在自过程中的多方面的作用.
- 调查 Ate1 影响自及其相关信号通路的机制.
- 确定Ate1失活对细胞平衡和基质加工的影响.
主要方法:
- 聚焦显微镜和生物化学试验研究Ate1亚细胞分布和p62-cargo集群.
- 免疫光和非降解性免疫阻塞,以分析局部化和多元化.
- 利用Ate1淘汰 (KO) 细胞和表型救援模型来评估Ate1在自动力学,LC3B周转,p62/SQSTM1水平和mTORC1/AMPk信号传递中的功能.
主要成果:
- 甲基转移酶 (Ate1) 与p62聚合,促进自清除和调节自信号.
- 细胞特异性Ate1的非激活导致mTORC1/AMPk信号过度激活,导致自流和基质积累受损.
- Ate1的子宫外表达部分挽救了观察到的自缺陷.
结论:
- Ate1在通过mTORC1/AMPk通路调节自方面具有关键的清洁功能.
- 调节失调的Ate1介导的自与神经退行性疾病和癌症有关.
- Ate1代表了与自功能受损相关的疾病的潜在治疗标.
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