Abstract
One natural recombinant subgroup B avian leukosis virus (ALV) with a subgroup J-like U3 region was isolated from commercial native chickens that experienced disease in 2014 and named GX14FF03. GX14FF03 was isolated by DF-1 cell culture and then identified with ELISA detection of avian leukosis virus p27 group-specific antigen, the detection of subtype specific PCR, and indirect immunofluorescence assay with ALV-B-specific monoclonal antibody. Its complete proviral genome was sequenced and compared with the reference strains of ALVs and found that the gag and pol were relatively conservative. The gp85 of GX14FF03 showed 91.3–96.2% amino acid identity to the other ALV-B reference strains and 36.0–37.1% identity to the ALV-J reference strains, and its U3 region showed 49.4–89.3% nucleotide identity to ALV-A, B, C, D, E, K reference strains and 91.6–95.3% identity to ALV-J reference strains. Phylogenetic analysis of U3 region showed that GX14FF03 and ALV-J reference strains were in the same cluster. Moreover, an additional AIB REP1 retroviral transcription regulatory element was found in GX14FF04 U3 region which was only presenting in ALV-J strains. These results suggested that isolate GX14FF03 may be a recombinant ALV-B with the ALV-J-like U3 region.
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Acknowledgements
This work was supported by the National Eradication Program for AL [201203055], and the Guangxi Program for Modern Agricultural Industry Technical System Construction-Chicken Industry [nycytxgxcxtd-04-20-2].
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This work was conceived, designed, performed, and written by Peikun Wang. Yongli Yang helped in sequence sorting. Lulu Lin and Haijuan Li helped in virus isolation. Ping Wei contributed materials and reagents, supervised the development of the work, and evaluated the manuscript.
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Wang, P., Yang, Y., Lin, L. et al. Complete genome sequencing and characterization revealed a recombinant subgroup B isolate of avian leukosis virus with a subgroup J-like U3 region. Virus Genes 53, 927–930 (2017). https://doi.org/10.1007/s11262-017-1493-4
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DOI: https://doi.org/10.1007/s11262-017-1493-4