Two complete duck hepatitis virus type 1 (DHV-1) genomes, strain SY5 and its chicken embryos passage descendent vaccine strain ZJ-A, were compared and analyzed in order to identify possible sites of attenuation. Of the 205 nucleotide changes, 22 resulted in sense mutations, 174 produced nonsense mutations. Besides, there are 7 consistent nucleotides substitutions in 5′UTR and 2 in 3′UTR. Three of these 22 sense mutations resided in VP0, 6 exists in VP1, one exists in VP3, 3 exists in 2A2, 3 exists in 2C, one was detected in 3B and 5 was in 3D. These results suggested that VP0, VP1, 3D, and 5′/3′UTR may contribute to the attenuation of DHV-1 in chicken/duck/embryos. The results provide a genetic basis for future manipulation of a DHV-1 infectious clone.
| Authors: |
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Yong Wang, Chuanfeng Li, Zongyan Chen, Binrui Xu, Gang Li, Guangqing Liu |
| Journal: |
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Virus Genes
|
| Year: |
|
2012 |
| DOI: |
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10.1007/s11262-012-0767-0 |
| Publication date: |
|
22-06-2012 |