An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV)
The infectious bursal disease virus (IBDV), one member of the <i>Birnaviridae</i> family, causes immunosuppression in young chickens by damaging the mature B cells of the bursa of Fabricius (BF), the central immune system of young chickens. The genome of IBDV is a bisegmented, double-str...
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MDPI AG
2022-06-01
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| Series: | Viruses |
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| Online Access: | https://www.mdpi.com/1999-4915/14/7/1396 |
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| author | Xifeng Hu Zheng Chen Xiangdong Wu Zhen Ding Qinghua Zeng Huansheng Wu |
| author_facet | Xifeng Hu Zheng Chen Xiangdong Wu Zhen Ding Qinghua Zeng Huansheng Wu |
| author_sort | Xifeng Hu |
| collection | DOAJ |
| description | The infectious bursal disease virus (IBDV), one member of the <i>Birnaviridae</i> family, causes immunosuppression in young chickens by damaging the mature B cells of the bursa of Fabricius (BF), the central immune system of young chickens. The genome of IBDV is a bisegmented, double-strand RNA (dsRNA). Reverse genetics systems for IBDV allow the generation of genetically manipulated infectious virus via transfected plasmid DNA, encoding the two genomic viral RNA segments as well as major viral proteins. For this purpose, the minus-sense of both segment A and segment B are inserted into vectors between the polymerase I promoter and the corresponding terminator I. These plasmids facilitate the transcription of the viral minus-sense genome but copy the plus-sense genome as well viral protein translation depends on the activity of VP1 and VP3, when transfected into 293T cells. To further improve rescue efficiency, dual-direction promoters were generated based on the polymerase II promoter in the reverse direction in the backbone of the pCDNA3.0 vector. Therefore, the polymerase I promoter transcribes the viral minus-sense genome in the forward direction and the polymerase II promoter transcribes viral mRNA, translated into viral proteins that produce infectious IBDV. We also found that the rescue efficiency of transfecting two plasmids is significantly higher than that of transfecting four plasmids. In addition, this dual-direction promoter rescue system was used to generate R186A mutant IBDV since Arg186 is the arginine monomer-methylation site identified by LC–MS. Our data furtherly showed that the Arg186 monomer methylation mutant was due to a reduction in VP1 polymerase activity as well as virus replication, suggesting that the Arg186 methylation site is essential for IBDV replication. |
| first_indexed | 2024-03-09T05:44:12Z |
| format | Article |
| id | doaj.art-720fea655ca94358bcb1c4127629ebc2 |
| institution | Directory Open Access Journal |
| issn | 1999-4915 |
| language | English |
| last_indexed | 2024-03-09T05:44:12Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Viruses |
| spelling | doaj.art-720fea655ca94358bcb1c4127629ebc22023-12-03T12:22:50ZengMDPI AGViruses1999-49152022-06-01147139610.3390/v14071396An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV)Xifeng Hu0Zheng Chen1Xiangdong Wu2Zhen Ding3Qinghua Zeng4Huansheng Wu5Department of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaDepartment of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaDepartment of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaDepartment of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaDepartment of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaDepartment of Preventive Veterinary Medicine, College of Animal Science and Technology, Jiangxi Agricultural University, Zhimin Street, Qingshan Lake, Nanchang 330045, ChinaThe infectious bursal disease virus (IBDV), one member of the <i>Birnaviridae</i> family, causes immunosuppression in young chickens by damaging the mature B cells of the bursa of Fabricius (BF), the central immune system of young chickens. The genome of IBDV is a bisegmented, double-strand RNA (dsRNA). Reverse genetics systems for IBDV allow the generation of genetically manipulated infectious virus via transfected plasmid DNA, encoding the two genomic viral RNA segments as well as major viral proteins. For this purpose, the minus-sense of both segment A and segment B are inserted into vectors between the polymerase I promoter and the corresponding terminator I. These plasmids facilitate the transcription of the viral minus-sense genome but copy the plus-sense genome as well viral protein translation depends on the activity of VP1 and VP3, when transfected into 293T cells. To further improve rescue efficiency, dual-direction promoters were generated based on the polymerase II promoter in the reverse direction in the backbone of the pCDNA3.0 vector. Therefore, the polymerase I promoter transcribes the viral minus-sense genome in the forward direction and the polymerase II promoter transcribes viral mRNA, translated into viral proteins that produce infectious IBDV. We also found that the rescue efficiency of transfecting two plasmids is significantly higher than that of transfecting four plasmids. In addition, this dual-direction promoter rescue system was used to generate R186A mutant IBDV since Arg186 is the arginine monomer-methylation site identified by LC–MS. Our data furtherly showed that the Arg186 monomer methylation mutant was due to a reduction in VP1 polymerase activity as well as virus replication, suggesting that the Arg186 methylation site is essential for IBDV replication.https://www.mdpi.com/1999-4915/14/7/1396IBDVdual-direction promotervirus rescueArg186methylation |
| spellingShingle | Xifeng Hu Zheng Chen Xiangdong Wu Zhen Ding Qinghua Zeng Huansheng Wu An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) Viruses IBDV dual-direction promoter virus rescue Arg186 methylation |
| title | An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) |
| title_full | An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) |
| title_fullStr | An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) |
| title_full_unstemmed | An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) |
| title_short | An Improved, Dual-Direction, Promoter-Driven, Reverse Genetics System for the Infectious Bursal Disease Virus (IBDV) |
| title_sort | improved dual direction promoter driven reverse genetics system for the infectious bursal disease virus ibdv |
| topic | IBDV dual-direction promoter virus rescue Arg186 methylation |
| url | https://www.mdpi.com/1999-4915/14/7/1396 |
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