通过与MAGI1第一个PDZ域的相互作用来调节组织因子活性
Mohammad A Mohammad1,2, Sophie Featherby1, Camille Ettelaie3
1Biomedical Sciences/Hull York Medial School, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
Thrombosis journal
|January 17, 2024
概括
组织因子 (TF) 活性通过其与MAGI1的相互作用来调节. PAR2的激活破坏了这种结合,释放了TF,并增加了其前凝和信号活动.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 组织因子 (TF) 活动通过加密过程受到严格监管.
- 翻译后的修改和蛋白质/脂质相互作用调节TF活性.
- 膜相关的反向配置 (MAGI) 蛋白质控制蛋白质的局部化和功能.
研究的目的:
- 研究组织因子 (TF) 和MAGI蛋白之间的相互作用.
- 确定蛋白酶激活受体2 (PAR2) 激活如何影响TF-MAGI相互作用.
- 确定负责TF结合及其功能后果的MAGI1的特定域.
主要方法:
- 使用的MDA-MB-231细胞表达TF和MAGI1.
- 采用近距离结合试验 (PLA),共免疫沉和拉下实验.
- 对MAGI1的PDZ域进行表达和分析,以确定TF结合部位.
主要成果:
- TF主要与MAGI1相互作用,与MAGI2和MAGI3的相互作用较小.
- PAR2激活减少了TF和MAGI1.1之间的关联.
- 在TF中Ser253的酸化抑制了MAGI1的结合;MAGI1的PDZ1域结合了TF.
- 过度表达MAGI1的PDZ1域增强了TF的前凝和信号活动.
结论:
- 在TF和MAGI1的PDZ-1域之间存在稳定相互作用.
- PAR2的激活会破坏TF-MAGI1的相互作用,从而启动TF解密.
- 这种干扰增加了TF的前凝和信号活动,可能导致进一步激活.
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