酸酶PTPN22在mTORC2复合体中起到适配器的作用
Keshav Gupta1,2, Nagalakshmi Kommineni1, Tanuja Bogadi1
1Laboratory of Cell Death & Cell Survival, Centre for DNA Fingerprinting and Diagnostics (CDFD), Uppal, Hyderabad, Telangana, 500039, India.
EMBO reports
|September 16, 2025
概括
氨酸酸酶PTPN22作为支架蛋白,对于mTORC2复合体组装和AKT通路激活至关重要. 这种PTPN22的非催化作用对于细胞生长和存活至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子信号传输的方法
- 生物化学 生物化学
背景情况:
- 拉帕素 (mTOR) 激酶的机械性标调节细胞生长和新陈代谢.
- mTOR通过两个复合体运作:mTORC1和mTORC2,mTORC2的调节理解较少.
- 识别mTORC2的新型调节剂对于理解细胞信号来说至关重要.
研究的目的:
- 为了识别与mTORC2.2.相关的新型蛋白质.
- 阐明PTPN22在mTORC2信号和功能中的作用.
- 研究 PTPN22 影响 mTORC2 活动的机制.
主要方法:
- 同免疫沉用于识别mTORC2相关的蛋白质.
- 西部涂抹测试以评估AKT酸化.
- 细胞测定和裸体老鼠异种移植以评估细胞生长和存活.
主要成果:
- PTPN22被确定为一种mTORC2-关联蛋白.
- PTPN22对于mTORC2/AKT轴激活至关重要,独立于细胞系.
- PTPN22作为支架蛋白促进mSIN-RICTOR相互作用,对mTORC2完整性至关重要,独立于其酸酶活性.
- 失去PTPN22会影响AKT酸化和细胞生长/存活.
结论:
- PTPN22在mTORC2复杂组合和功能中发挥着关键的非催化作用.
- PTPN22对于调节mTORC2/AKT通路至关重要,影响细胞生长和存活.
- 这些发现揭示了PTPN22在细胞平衡中的新功能.
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