Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (11): 3927-3935.doi: 10.11843/j.issn.0366-6964.2022.11.018

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Host Annexin A2 Interacts with US3 of PRV and Its Effects on Apoptosis

GUO Zhenhua1, LI Xiang1, WENG Maoyang2, JIN Qianyue1, GUO Junqing1, XING Guangxu1, ZHANG Gaiping1,2,3*   

  1. 1. Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. Northwest Agricultural & Forest University, College of Veterinary Medicine, Yangling 712100, China;
    3. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
  • Received:2022-03-25 Online:2022-11-23 Published:2022-11-25

Abstract: US3 protein kinase is a critical virulence factor of pseudorabies virus (PRV). It is involved in many biological process, including cytoskeletal rearrangement, viral replication and transmission, antagonist apoptosis and interferon induced anti-viral response. The identification of US3 substrates is directly connected to understanding US3 functions and mechanisms. Here, we confirmed a host protein annexin A2 (ANXA2) can interact with US3 by co-immunoprecipitation and pull-down assay. Knock down the expression of ANXA2 can significantly affect the PRV proliferation on PK-15 cells, which was verified through quantitative PCR, viral titer and immunoblot analysis. Furthermore, we found that ANXA2 could inhibit apoptosis of PK-15 cells indued by PRV infection and apoptotic stimulator, suggesting that ANXA2 negatively regulates apoptosis. This study expands the host protein members that interact with US3 and deepens our understanding of the biological functions of ANXA2.

Key words: pseudorabies virus, US3, annexin A2, protein interaction, apoptosis

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