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Nuclear localization of the p17 protein of avian reovirus is correlated with autophagy induction and an increase in viral replication

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Abstract

p17 is a nonstructural protein of avian reovirus (ARV) that induces autophagy in infected cells. In the present study, we investigated the effect of p17 and its nuclear localization signal (NLS) on autophagy and viral replication. When Vero cells and DF1 cells were transfected with mutant p17 in which lysine (K) at position 122 and arginine (R) at position 123 were mutated to alanine (A), the expression level of LC3 II decreased dramatically after transfection. The expression of the polypeptide encompassing the first 103 amino acids of p17, a region that did not contain the NLS, did not have a significant effect on autophagy. Moreover, when cells overexpressing mutant p17 were infected with the ARV GX2010/1 strain, the viral titer was significantly decreased compared with the expression of wild-type p17. In general, the NLS of p17 facilitates the induction of autophagy and is correlated with an increase in virus production.

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Acknowledgments

We thank Dr. Songshu Meng at Dalian Medical University for suggestions. This work was financially supported by the National Natural Science Foundation of China (31272576), the China Agriculture Research System (CARS-41-K08), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Authors and Affiliations

  1. Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China

    Chenxi Li, Hongchen Wei, Liping Yu, Shipeng Duan, Jinghua Cheng, Wenguang Yan, Xiaorong Zhang & Yantao Wu

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  1. Chenxi Li
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  2. Hongchen Wei
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  3. Liping Yu
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Correspondence to Yantao Wu.

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Li, C., Wei, H., Yu, L. et al. Nuclear localization of the p17 protein of avian reovirus is correlated with autophagy induction and an increase in viral replication. Arch Virol 160, 3001–3010 (2015). https://doi.org/10.1007/s00705-015-2598-5

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  • DOI: https://doi.org/10.1007/s00705-015-2598-5

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