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Updated: Jun 18, 2025

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Author Spotlight: Imaging ATG9A, a Multi-Spanning Membrane Protein
Published on: June 16, 2023
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TMEM9通过与Beclin1的相互作用激活了Rab9依赖的替代性自
Sohyeon Baek1, Jae-Woong Chang2,3, Seung-Min Yoo2
1Department of Biological Sciences and Biotechnology, Chungbuk National University, Cheongju, 28644, South Korea.
Cellular and molecular life sciences : CMLS
|July 30, 2024
概括
跨膜蛋白9 (TMEM9) 通过与Beclin1相互作用,调节替代性自,解离抑制剂Bcl-2. 这一过程对于溶酶体功能和自细胞激活至关重要.
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:
- 已知跨膜蛋白9 (TMEM9) 通过与v型ATPase复合体的相互作用来调节 lysosomal 酸化.
- 在 lysosome-dependent自途径中,TMEM9的特定作用在很大程度上仍未被描述.
研究的目的:
- 阐明TMEM9在自机械中的功能.
- 调查TMEM9与关键的自调节器的相互作用,特别是Beclin1.
- 确定TMEM9影响自的机制,特别是其他自途径.
主要方法:
- 通过生物化学测试,研究了TMEM9和Beclin1细胞系域之间的相互作用.
- 利用局部化研究来检查TMEM9与Rab9和LC3在晚期内分体和溶解体中的局部化.
- 评估了TMEM9糖化在它的溶酶体局部化,Beclin1相互作用和自激活中的作用.
主要成果:
- TMEM9通过其Bcl-2-结合域直接与Beclin1相互作用,导致自抑制剂Bcl-2的解离.
- TMEM9与Rab9在晚期内和溶酶体上同位,但与LC3没有同位,表明参与LC3独立自.
- TMEM9的糖化对其溶酶体向,Beclin1相互作用以及随后激活Rab9依赖的替代性自至关重要.
结论:
- TMEM9作为Rab9依赖的替代性自的关键调节者.
- TMEM9通过在Rab9依赖性自细胞中招募和激活Beclin1复合体来促进自.
- 这些发现揭示了一种通过TMEM9.9连接 lysosomal 功能和自调节的新机制.
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