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单纯疱疹病毒 1 糖蛋白 D 与宿主抗病毒蛋白 viperin 的相互作用机制。

The Interaction Mechanism Between Herpes Simplex Virus 1 Glycoprotein D and Host Antiviral Protein Viperin.

机构信息

Guangdong Provincial Key Laboratory of Allergy and Clinical Immunology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.

Department of Pathogenic Biology and Immunology, School of Basic Medical Science, Sino-French Hoffmann Institute, Guangzhou Medical University, Guangzhou, China.

出版信息

Front Immunol. 2019 Dec 11;10:2810. doi: 10.3389/fimmu.2019.02810. eCollection 2019.

Abstract

Viperin is an interferon-inducible protein that responsible for a variety of antiviral responses to different viruses. Our previous study has shown that the ribonuclease UL41 of herpes simplex virus 1 (HSV-1) can degrade the mRNA of viperin to promote HSV-1 replication. However, it is not clear whether other HSV-1 encoded proteins can regulate the function of viperin. Here, one novel viperin associated protein, glycoprotein D (gD), was identified. To verify the interaction between gD and viperin, gD and viperin expression plasmids were firstly co-transfected into COS-7 cells, and fluorescence microscope showed they co-localized at the perinuclear region, then this potential interaction was confirmed by co-immunoprecipitation (Co-IP) assays. Moreover, confocal microscopy demonstrated that gD and viperin co-localized at the Golgi body and lipid droplets. Furthermore, dual-luciferase reporter and Co-IP assays showed gD and viperin interaction leaded to the increase of IRF7-mediated IFN-β expression through promoting viperin and IRAK1 interaction and facilitating K63-linked IRAK1 polyubiquitination. Nevertheless, gD inhibited TRAF6-induced NF-κB activity by decreasing the interaction of viperin and TRAF6. In addition, gD restrained viperin-mediated interaction between IRAK1 and TRAF6. Eventually, gD and viperin interaction was corroborated to significantly inhibit the proliferation of HSV-1. Taken together, this study would open up new avenues toward delineating the function and physiological significance of gD and viperin during HSV-1 replication cycle.

摘要

Viperin 是一种干扰素诱导蛋白,负责对各种不同病毒产生多种抗病毒反应。我们之前的研究表明,单纯疱疹病毒 1(HSV-1)的核糖核酸酶 UL41 可以降解 viperin 的 mRNA,从而促进 HSV-1 的复制。然而,目前尚不清楚 HSV-1 编码的其他蛋白是否可以调节 viperin 的功能。在这里,我们鉴定到一个新的 viperin 相关蛋白,糖蛋白 D(gD)。为了验证 gD 与 viperin 之间的相互作用,首先将 gD 和 viperin 表达质粒共转染到 COS-7 细胞中,荧光显微镜显示它们在核周区域共定位,然后通过共免疫沉淀(Co-IP)实验进一步证实了这种潜在的相互作用。此外,共聚焦显微镜显示 gD 和 viperin 共定位于高尔基体和脂滴。进一步的双荧光素酶报告基因和 Co-IP 实验表明,gD 和 viperin 的相互作用通过促进 viperin 和 IRAK1 的相互作用以及促进 K63 连接的 IRAK1 多泛素化,导致 IRF7 介导的 IFN-β 表达增加。然而,gD 通过减少 viperin 和 TRAF6 的相互作用抑制了 TRAF6 诱导的 NF-κB 活性。此外,gD 抑制了 viperin 介导的 IRAK1 和 TRAF6 之间的相互作用。最终,gD 和 viperin 的相互作用被证实可显著抑制 HSV-1 的增殖。总之,这项研究为阐明 gD 和 viperin 在 HSV-1 复制周期中的功能和生理意义开辟了新的途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e7a4/6917645/bac50118e207/fimmu-10-02810-g0001.jpg

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