The helicase DDX41 recognizes the bacterial secondary messengers cyclic di-GMP and cyclic di-AMP to activate a type I interferon immune response.

The helicase DDX41 recognizes the bacterial secondary messengers cyclic di-GMP and cyclic di-AMP to activate a type I interferon immune response.
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解旋酶DDX41识别细菌次级信使环状DI-GMP和环状DI-AMP激活I型Interferon免疫反应。

DOI:
10.1038/ni.2460
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发表时间:
2012-12
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
文献类型:
--
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细菌第二信使环二GMP(c-di-GMP)或环二AMP(c-di-AMP)对I型干扰素的诱导依赖于涉及STING衔接子、TBK 1激酶和IRF 3转录因子的信号传导轴。在这里,我们确定了解旋酶DEAD盒多肽41(DDX 41)作为模式识别受体(PRR),感知c-di-GMP和c-di-AMP。DDX 41与c-di-GMP特异性直接相互作用。在鼠或人细胞中通过shRNA敲低DDX 41抑制了先天免疫基因的诱导,并导致响应c-di-GMP或c-di-AMP的有缺陷的STING、TBK 1和IRF 3活化。这些结果表明了c-di-GMP和c-di-AMP通过DDX 41 PRR检测的机制,DDX 41 PRR与STING复合以向TBK 1-IRF 3发信号并激活干扰素应答。
Induction of type I interferons by the bacterial secondary messengers cyclic-di-GMP (c-di-GMP) or cyclic-di-AMP (c-di-AMP) is dependent on a signaling axis involving the STING adaptor, TBK1 kinase and IRF3 transcription factor. Here we identified the helicase DEAD box polypeptide 41 (DDX41) as a pattern recognition receptor (PRR) that sensed both c-di-GMP and c-di-AMP. DDX41 specifically and directly interacted with c-di-GMP. Knockdown of DDX41 via shRNA in murine or human cells inhibited the induction of innate immune genes and resulted in defective STING, TBK1 and IRF3 activation in response to c-di-GMP or c-di-AMP. These results suggest a mechanism whereby c-di-GMP and c-di-AMP are detected by the DDX41 PRR, which complexes with STING to signal to TBK1-IRF3 and activate the interferon response.
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