Author:
Walther N,Lurz R,Patschinsky T,Jansen H W,Bister K
Abstract
Molecularly cloned proviral DNA of avian oncogenic retrovirus CMII was isolated by screening a genomic library of a CMII-transformed quail cell line with a myc-specific probe. On a 10.4-kilobase EcoRI fragment, the cloned DNA contained 4.4 kilobases of CMII proviral sequences extending from the 5' long terminal repeat to the EcoRI site within the partial (delta) complement of the env gene. The gene order of CMII proviral DNA is 5'-delta gag-v-myc-delta pol-delta env-3'. All three structural genes are partially deleted: the gag gene at the 3' end, the env gene at the 5' end, and the pol gene at both ends. The delta gag (0.83 kilobases)-v-myc (1.50 kilobases) sequences encode the p90gag-myc transforming protein of CMII. In comparison with the p110gag-myc protein of acute leukemia virus MC29, p90gag-myc lacks amino acids corresponding to additional 516 bases of gag sequences and 12 bases of 5' v-myc sequences present in the MC29 genome. Nucleotide sequence analysis of CMII proviral DNA at the delta gag-v-myc and the v-myc-delta pol junctions revealed significant homologies between avian retroviral structural genes and the cellular oncogene c-myc precisely at the positions corresponding to the gene junctions in CMII. Furthermore, the delta gag-v-myc junction in CMII corresponds to sequence elements in gag and C-myc that are possible splicing signals. The data suggest that transduction of cellular oncogenes may involve RNA splicing and recombination with homologous sequences on retroviral vectors. Different sequence elements of both the retroviral vectors and the c-myc gene recombined during genesis of highly oncogenic retroviruses CMII, MC29, or MH2.
Publisher
American Society for Microbiology
Subject
Virology,Insect Science,Immunology,Microbiology
Reference54 articles.
1. Nucleotide sequence of the v-myc oncogene of avian retrovirus MC29;Alitalo K.;Proc. Natl. Acad. Sci. U.S.A.,1983
2. Identification of nuclear proteins encoded by viral and cellular myc oncogenes;Alitalo K.;Nature (London),1983
3. Beard J. W. 1980. Avian oncornaviruses: biology p. 55-87. In G. Klein (ed.) Viral oncology Raven Press New York.
4. Bister K. 1984. Molecular biology of avian acute leukaemia viruses p. 38-63. In J. M. Goldman and 0. Jarrett (ed.) Leukaemia and Iymphoma research vol. 1. Mechanisms of viral leukaemogenesis. Churchill Livingstone Edinburgh.
5. Genetic structure of avian acute leukemia viruses;Bister K.;Cold Spring Harbor Symp. Quant. Biol.,1980
Cited by
21 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献