Effects of the nuclear localization of the N-pro protein of classical swine fever virus on its virulence in pigs

文献类型： 外文期刊

第一作者： Li, Yongfeng

作者： Li, Yongfeng;Shen, Liang;Sun, Yuan;Wang, Xiao;Li, Chao;Huang, Junhua;Chen, Jianing;Li, Lianfeng;Zhao, Bibo;Luo, Yuzi;Li, Su;Qiu, Hua-Ji

作者机构：

关键词： Classical swine fever virus;N-pro protein;Interferon regulatory factor 3;Nuclear localization;Virulence

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）

ISSN：

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收录情况： SCI

摘要： The N-pro protein of classical swine fever virus (CSFV) is localized in the cytoplasm and nucleus. However, it is unknown whether the nuclear localization of N-pro correlates with the virulence of CSFV in the host. Previously, we showed that the N-pro protein fused with interferon regulatory factor 3 (IRF3) was present only in the cytoplasm. Here, we generated and evaluated a recombinant CSFV vSM-IRF3 harboring the IRF3 gene inserted into the N-pro gene of the highly virulent CSFV Shimen strain. Compared to the even nuclear and cytoplasmic distribution of the enhanced green fluorescent protein (EGFP)-N-pro fusion expressed by the recombinant CSFV EGFP-CSFV, vSM-IRF3 expressed an IRF3-N-pro fusion protein that only was localized in the cytoplasm. vSM-IRF3 was markedly attenuated in vitro and in vivo, and the inoculated pigs were completely protected from lethal CSFV challenge, whereas the parental virus as well as EGFP-CSFV exhibited a typical virulent phenotype. Taken together, the nuclear localization of N-pro plays a significant role in the CSFV replication and virulence. (C) 2014 Elsevier B.V. All rights reserved.

分类号： S8

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