DAP12与RER1相互作用,并在与TREM2组装之前被保留在分泌途径中
Yanxia Liu1, Sandra Theil1, Melanie Ibach1
1Department of Neurology, University of Bonn, Bonn, 53127, Germany.
Cellular and molecular life sciences : CMLS
|July 15, 2024
概括
在ER分类受体1 (RER1) 中的保留调节了12kDa (DAP12) 贩运的DNAX激活蛋白. 删除RER1损害了DAP12-TREM2复合体,减少了免疫细胞的细胞消化.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 12kDa的DNAX激活蛋白 (DAP12) 是免疫细胞中关键的适应蛋白,与TREM2等受体形成复合体.
- 功能障碍的DAP12和TREM2与神经退行性疾病有关,但它们的贩运和监管仍然不清楚.
研究的目的:
- 调查调节DAP12亚细胞贩运和营业额的机制.
- 阐明RER1在DAP12-TREM2复合体形成和免疫细胞功能中的作用.
主要方法:
- 评估了DAP12在TREM2的存在或缺席下对蛋白质体的降解.
- 研究了未组装的DAP12在分泌区中的定位.
- 研究了DAP12和RER1.1.之间的相互作用.
- 利用RER1删除来评估其对THP-1细胞中TREM2-DAP12复合体和细胞的影响.
主要成果:
- 当TREM2缺席时,DAP12的保护体降解会增加.
- 未组装的DAP12被保留在ER和ERGIC中,阻碍了等离子体膜的传输.
- 未组装的DAP12与RER1.1相互作用.
- 删除RER1会减少TREM2-DAP12复合体,损害信号传输,并抑制细胞化.
结论:
- RER1对于DAP12的适当贩运和表面表达至关重要.
- RER1 调节功能性含有 DAP12 的免疫受体复合物的形成.
- RER1在调节免疫细胞功能的过程中发挥着重要作用,特别是细胞.
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