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Interaction between Two Iridovirus Core Proteins and Their Effects on Ranavirus (RGV) Replication in Cells from Different Species. Viruses 2019; 11:v11050416. [PMID: 31060251 PMCID: PMC6563300 DOI: 10.3390/v11050416] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 12/16/2022] Open
Abstract
The two putative proteins RGV-63R and RGV-91R encoded by Rana grylio virus (RGV) are DNA polymerase and proliferating cell nuclear antigen (PCNA) respectively, and are core proteins of iridoviruses. Here, the interaction between RGV-63R and RGV-91R was detected by a yeast two-hybrid (Y2H) assay and further confirmed by co-immunoprecipitation (co-IP) assays. Subsequently, RGV-63R or RGV-91R were expressed alone or co-expressed in two kinds of aquatic animal cells including amphibian Chinese giant salamander thymus cells (GSTCs) and fish Epithelioma papulosum cyprinid cells (EPCs) to investigate their localizations and effects on RGV genome replication. The results showed that their localizations in the two kinds of cells are consistent. RGV-63R localized in the cytoplasm, while RGV-91R localized in the nucleus. However, when co-expressed, RGV-63R localized in both the cytoplasm and the nucleus, and colocalized with RGV-91R in the nucleus. 91R△NLS represents the RGV-91R deleting nuclear localization signal, which is localized in the cytoplasm and colocalized with RGV-63R in the cytoplasm. qPCR analysis revealed that sole expression and co-expression of the two proteins in the cells of two species significantly promoted RGV genome replication, while varying degrees of viral genome replication levels may be linked to the cell types. This study provides novel molecular evidence for ranavirus cross-species infection and replication.
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Akuzum B, Kim S, Nguyen TT, Hong J, Lee S, Kim E, Kim J, Choi Y, Jhun H, Lee Y, Kim H, Sohn DH, Kim S. L1 Recombinant Proteins of HPV Tested for Antibody Forming Using Sera of HPV Quadrivalent Vaccine. Immune Netw 2018; 18:e19. [PMID: 29984037 PMCID: PMC6026689 DOI: 10.4110/in.2018.18.e19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 05/10/2018] [Accepted: 05/27/2018] [Indexed: 12/01/2022] Open
Abstract
Virus-like particles (VLPs) derived from human papillomavirus (HPV) L1 capsid proteins were used for HPV quadrivalent recombinant vaccine. The HPV quadrivalent vaccine is administrated in a 3-dose regimen of initial injection followed by subsequent doses at 2 and 6 months to prevent cervical cancer, vulvar, and vaginal cancers. The type 6, 11, 16, or 18 of HPV infection is associated with precancerous lesions and genital warts in adolescents and young women. The HPV vaccine is composed of viral L1 capsid proteins are produced in eukaryotic expression systems and purified in the form of VLPs. Four different the L1 protein of 3 different subtypes of HPV: HPV11, HPV16, and HPV18 were expressed in Escherichia coli divided into 2 fragments as N- and C-terminal of each protein in order to examine the efficacy of HPV vaccine. Vaccinated sera failed to recognize N-terminal L1 HPV type 16 and type 18 by western blot while they detected N-terminal L1 protein of HPV type 11. Moreover, the recombinant C-terminal L1 proteins of type 16 was non-specifically recognized by the secondary antibody conjugated with horseradish peroxidase. This expression and purification system may provide simple method to obtain robust recombinant L1 protein of HPV subtypes to improve biochemical analysis of antigens with immunized sera.
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Affiliation(s)
- Begum Akuzum
- Laboratory of Cytokine Immunology, Department of Biomedical Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Sinae Kim
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea.,YbdYbiotech Research Center, Seoul 08589, Korea
| | - Tam Thanh Nguyen
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea.,YbdYbiotech Research Center, Seoul 08589, Korea
| | - Jeawoo Hong
- Laboratory of Cytokine Immunology, Department of Biomedical Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Siyoung Lee
- YbdYbiotech Research Center, Seoul 08589, Korea
| | - Eunhye Kim
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea.,YbdYbiotech Research Center, Seoul 08589, Korea
| | - Joohee Kim
- Laboratory of Cytokine Immunology, Department of Biomedical Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Yeook Choi
- Laboratory of Cytokine Immunology, Department of Biomedical Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Hyunjhung Jhun
- YbdYbiotech Research Center, Seoul 08589, Korea.,Research Group of Nutraceuticals for Metabolic Syndrome, Korea Food Research Institute, Wanju 55365, Korea
| | - Youngmin Lee
- Department of Medicine, Pusan Paik Hospital, Inje University College of Medicine, Busan 47392, Korea
| | - Hyunwoo Kim
- Division of Nephrology, Department of Internal Medicine, Jeju National University School of Medicine, Jeju 63243, Korea
| | - Dong Hyun Sohn
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan 50612, Korea
| | - Soohyun Kim
- Laboratory of Cytokine Immunology, Department of Biomedical Science and Technology, Konkuk University, Seoul 05029, Korea.,College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea
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