在T细胞中,LUBAC调节了TRAF6下游的CBM复杂功能
Carina Graß1, Franziska Ober1, Constanze Sixt1
1Signaling and Immunity, Research Unit Signaling and Translation, Molecular Targets and Therapeutics Center, Helmholtz Munich - German Research Center for Environmental Health, Neuherberg, Germany.
Nature communications
|November 10, 2025
概括
线性ubiquitin链组合复合体 (LUBAC) 和TRAF6调节T细胞受体信号传递. 虽然LUBAC对NF-κB激活不至关重要,但它调节MALT1基质识别和BCL10无化,影响T细胞反应.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- CARD11-BCL10-MALT1 (CBM) 综合体对于T细胞受体 (TCR) 信号传递和NF-κB激活至关重要.
- 线性ubiquitin链组合复合体 (LUBAC) 和TRAF6都与CBM复合体相互作用,但它们的协调作用尚不清楚.
研究的目的:
- 阐明LUBAC和TRAF6在调节TCR刺激后CBM复杂活动中的不同和协调的作用.
- 研究这些E3链酶如何影响NF-κB信号传递,MALT1蛋白酶活性和下游T细胞反应.
主要方法:
- 利用人类的CD4+ T细胞来评估TCR诱导的NF-κB激活.
- 研究了LUBAC和TRAF6对NF-κB向基因表达的影响.
- 分析了响应LUBAC和TRAF6活动的MALT1基质识别和BCL10无化.
- 检查了BCL10无化对CBM复杂丝形成的结构后果.
主要成果:
- 与TRAF6.6不同的是,LUBAC在很大程度上可以用于TCR诱导的人类CD4+T细胞中的NF-κB激活,而TRAF6.
- 作为LUBAC的一个组成部分的HOIP,有助于NF-κB向基因表达.
- LUBAC和TRAF6共同调节MALT1基质识别,影响T细胞的反应.
- 通过LUBAC介导的BCL10的Met1相关的全域化是TRAF6依赖的.
- 在BCL10上的化位是结构性重要,限制了光线的形成,并表明LUBAC在TRAF6.6的下游活动.
结论:
- 卢巴克在TCR信号传递,调节MALT1活动和BCL10无处不在的过程中,在TRAF6下游起着调节作用.
- 通过LUBAC催化的BCL10无处不在抑制CBM复杂线索的形成,提供了一个控制信号持续时间和强度的机制.
- 这些发现澄清了LUBAC和TRAF6对适应性免疫信号通路的独特贡献.
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