China Animal Husbandry & Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (7): 2569-2576.doi: 10.16431/j.cnki.1671-7236.2021.07.033

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Study on Interaction Between Transmissible Gastroenteritis Virus Nsp2 and Host Cell Protein PSMD11

SUN Aoying1, WANG Yanan1, JIANG Yanping1,2, CUI Wen1,2, QIAO Xinyuan1,2, ZHOU Han1,2, TANG Lijie1,2, XU Yigang1,2, LI Yijing1,2, WANG Li1,2   

  1. 1. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China;
    2. Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin 150030, China
  • Received:2020-12-08 Online:2021-07-20 Published:2021-07-15

Abstract: To determine whether there was an interaction between Transmissible gastroenteritis virus (TGEV) nonstructural protein 2 (Nsp2) and the host cell protein 26S proteasome non-ATPase regulatory subunit 11 (PSMD11),RT-PCR was used to amplify the porcine PSMD11 gene and eukaryotic expression vector pCMV-Myc-PSMD11 was constructed,which was verified by sequencing and double enzyme digestion.And then pCMV-Myc-PSMD11 was transfected into intestinal epithelial cell lines J2 (IPEC-J2),Western blotting and indirect immunofluorescence assay (IFA) were used to detect whether pCMV-Myc-PSMD11 could be expressed in IPEC-J2 cells.Then,the co-immunoprecipitation (Co-IP) experiment was used to determine the interaction between TGEV Nsp2 and PSMD11 of the host cell,and the co-localization of TGEV Nsp2 and PSMD11 in the host cell was observed by laser confocal microscope.The results showed that porcine PSMD11 gene was successfully amplified,with a size of 1 474 bp,and the gene sequence was completely consistent with the standard sequence.The constructed eukaryotic expression vector pCMV-Myc-PSMD11 could successfully express PSMD11 protein in IPEC-J2 cells.The results of Co-IP indicated that there was an interaction between PSMD11 and Nsp2.The results of the colocalization experiment showed that the interaction between PSMD11 and Nsp2 occured in the cytoplasm,and the expression position of PSMD11 in the cell was not changed due to the expression of Nsp2.The results of this study provided new clues for further study of the important role of TGEV Nsp2 in the process of virus infection.

Key words: Transmissible gastroenteritis virus (TGEV); Nsp2; PSMD11; protein interaction

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