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IFITM3 restricts porcine deltacoronavirus infection by targeting its Spike protein

文献类型： 外文期刊

作者： Wu J.;Tang R.;Zhang X.;Gao M.;Guo L.;Zhang L.;Shi D.;Zhang X.;Shi H.;Song H.;Feng L.;Chen J.

作者机构：

关键词： Antiviral;IFITM3;ISG;PDCoV;S protein

期刊名称： Veterinary Microbiology

ISSN： 0378-1135

年卷期： 2024 年 288 卷

页码：

收录情况： SCIE（2024版）

摘要： The discovery of antiviral molecules is crucial for controlling porcine deltacoronavirus (PDCoV). Previous studies have provided evidence that the IFN-inducible transmembrane protein 3 (IFITM3), which is coded by an interferon-stimulated gene, prevents the infections of a number of enveloped viruses. Nevertheless, the involvement of IFITM3 in PDCoV infection remains unexplored. In this study, it was observed that the overexpression of IFITM3 successfully restrictes the infection of PDCoV in cell cultures. Conversely, the suppression of IFITM3 facilitates the infection of PDCoV in IPI-2I and IPEC-J2 cells. Further studies revealed that IFITM3 limits the attachment phase of viral infection by interacting with the S1 subunit of the PDCoV Spike (S) protein. In addition, IFITM3 is verified as a member of the CD225 family, the GxxxG conserved motif of this family is important for it to limit PDCoV infection. In summary, this study reveals the mechanism of IFITM3 as an antiviral molecule to inhibit PDCoV infection, and also provides theoretical supports for screening effective anti-PDCoV drugs. © 2023 Elsevier B.V.

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