当前位置: X-MOL 学术Cell Rep. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Gadd45β is critical for regulation of type I interferon signaling by facilitating G3BP-mediated stress granule formation
Cell Reports ( IF 7.5 ) Pub Date : 2023-11-02 , DOI: 10.1016/j.celrep.2023.113358
W A Gayan Chathuranga 1 , Chamilani Nikapitiya 1 , Jae-Hoon Kim 2 , Kiramage Chathuranga 1 , Asela Weerawardhana 1 , Niranjan Dodantenna 1 , Doo-Jin Kim 3 , Haryoung Poo 4 , Jae U Jung 5 , Chul-Ho Lee 6 , Jong-Soo Lee 1
Affiliation  

Stress granules (SGs) constitute a signaling hub that plays a critical role in type I interferon responses. Here, we report that growth arrest and DNA damage-inducible beta (Gadd45β) act as a positive regulator of SG-mediated interferon signaling by targeting G3BP upon RNA virus infection. Gadd45β deficiency markedly impairs SG formation and SG-mediated activation of interferon signaling . Gadd45β knockout mice are highly susceptible to RNA virus infection, and their ability to produce interferon and cytokines is severely impaired. Specifically, Gadd45β interacts with the RNA-binding domain of G3BP, leading to conformational expansion of G3BP1 via dissolution of its autoinhibitory electrostatic intramolecular interaction. The acidic loop 1- and RNA-binding properties of Gadd45β markedly increase the conformational expansion and RNA-binding affinity of the G3BP1-Gadd45β complex, thereby promoting assembly of SGs. These findings suggest a role for Gadd45β as a component and critical regulator of G3BP1-mediated SG formation, which facilitates RLR-mediated interferon signaling.

中文翻译:


Gadd45β 通过促进 G3BP 介导的应激颗粒形成,对于调节 I 型干扰素信号转导至关重要



应激颗粒 (SG) 构成信号中枢,在 I 型干扰素反应中发挥关键作用。在这里,我们报告说,生长停滞和 DNA 损伤诱导型 β (Gadd45β) 通过在 RNA 病毒感染时靶向 G3BP,充当 SG 介导的干扰素信号传导的正调节因子。 Gadd45β 缺陷显着损害 SG 形成和 SG 介导的干扰素信号传导激活。 Gadd45β基因敲除小鼠极易受到RNA病毒感染,其产生干扰素和细胞因子的能力严重受损。具体来说,Gadd45β 与 G3BP 的 RNA 结合结构域相互作用,通过溶解其自抑制静电分子内相互作用导致 G3BP1 构象扩张。 Gadd45β 的酸性环 1 和 RNA 结合特性显着增加 G3BP1-Gadd45β 复合物的构象扩展和 RNA 结合亲和力,从而促进 SG 的组装。这些发现表明 Gadd45β 作为 G3BP1 介导的 SG 形成的组成部分和关键调节因子,促进 RLR 介导的干扰素信号传导。
更新日期:2023-11-02
down
wechat
bug