Interaction of suppressor of cytokine signalling 3 with cavin-1 links SOCS3 function and cavin-1 stability.

Interaction of suppressor of cytokine signalling 3 with cavin-1 links SOCS3 function and cavin-1 stability.
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DOI:
10.1038/s41467-017-02585-y
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发表时间:
2018-01-12
影响因子:
16.6
通讯作者:
Palmer TM
Palmer TM
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Williams JJL;Alotaiq N;Mullen W;Burchmore R;Liu L;Baillie GS;Schaper F;Pilch PF;Palmer TM

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通过诱导型抑制剂“细胞因子信号传导抑制因子3”(SOCS 3)有效抑制JAK-STAT信号传导对于限制来自细胞因子受体的信号传导是必需的。在这里,我们表明,cavin-1,小窝的一个组成部分,是一个功能上重要的SOCS 3相互作用蛋白。生物化学和共聚焦成像表明,SOCS 3定位到质膜需要cavin-1。SOCS 3对于cavin-1的稳定也是至关重要的,使得SOCS 3的缺失降低了cavin-1和caveolin-1蛋白的表达,从而降低了内皮细胞中的小窝丰度。此外,cavin-1和SOCS 3的相互作用对于SOCS 3功能是必不可少的,因为cavin-1的缺失增强了精氨酸刺激的STAT 3磷酸化,并消除了SOCS 3依赖性的环AMP对IL-6信号传导的抑制。总之,这些发现揭示了一种新的功能上重要的机制,将SOCS 3介导的细胞因子信号传导的抑制与通过与cavin-1的相互作用和cavin-1的稳定化定位在质膜上联系起来。SOCS 3是JAK-STAT介导的细胞因子信号传导的重要负反馈抑制剂。在这里,作者暗示cavin-1 -小窝的一种重要成分-在SOCS 3向质膜的募集中,以防止持续的细胞因子受体信号传导。
Effective suppression of JAK–STAT signalling by the inducible inhibitor “suppressor of cytokine signalling 3” (SOCS3) is essential for limiting signalling from cytokine receptors. Here we show that cavin-1, a component of caveolae, is a functionally significant SOCS3-interacting protein. Biochemical and confocal imaging demonstrate that SOCS3 localisation to the plasma membrane requires cavin-1. SOCS3 is also critical for cavin-1 stabilisation, such that deletion of SOCS3 reduces the expression of cavin-1 and caveolin-1 proteins, thereby reducing caveola abundance in endothelial cells. Moreover, the interaction of cavin-1 and SOCS3 is essential for SOCS3 function, as loss of cavin-1 enhances cytokine-stimulated STAT3 phosphorylation and abolishes SOCS3-dependent inhibition of IL-6 signalling by cyclic AMP. Together, these findings reveal a new functionally important mechanism linking SOCS3-mediated inhibition of cytokine signalling to localisation at the plasma membrane via interaction with and stabilisation of cavin-1. SOCS3 is an important negative feedback inhibitor of JAK–STAT-mediated cytokine signalling. Here the authors implicate cavin-1 — an essential component of caveolae — in the recruitment of SOCS3 to the plasma membrane to prevent sustained cytokine receptor signalling.
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