RT Journal Article SR Electronic(1) A1 Wang, Yixin A1 Li, Jianliang A1 Li, Yang A1 Fang, Lichun A1 Sun, Xiaolong A1 Chang, Shuang A1 Zhao, Peng A1 Cui, ZhizhongYR 2016 T1 Identification of avian leukosis virus subgroup J-associated acutely transforming viruses carrying the v-src oncogene in layer chickens JF Journal of General Virology, VO 97 IS 5 SP 1240 OP 1248 DO https://doi.org/10.1099/jgv.0.000420 PB Microbiology Society, SN 1465-2099, AB To elucidate the molecular basis for the rapid oncogenicity of an acutely transforming avian leukosis virus (ALV), isolated from fibrosarcomas in Hy-Line Brown commercial layer chickens infected with ALV subgroup J (ALV-J), the complete genomic structure of the provirus was determined. In addition to ALV-J replication-complete virus SDAU1102, five proviral DNA genomes, named SJ-1, SJ-2, SJ-3, SJ-4 and SJ-5, carrying different lengths of the v-src oncogene were amplified from original tumours and chicken embryo fibroblasts (CEFs) infected with viral stocks. The genomic sequences of the SJ-1–SJ-5 provirus were closely related to that of SDAU1102 but were defective. The results of Western blot analysis and immunohistochemical staining also showed overexpression of the p60v-src protein in infected CEFs and tumour tissue. To the best of our knowledge, this is the first report of the isolation and identification of acutely transforming viruses carrying the v-src oncogene with ALV-J as the helper virus. It also offers insight into the generation of acutely transforming ALVs carrying the v-src oncogene., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/jgv.0.000420