Abelson Murine Leukemia Virus: Structural Requirements for Transforming Gene Function
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The integrated Abelson murine leukemia virus (A-MuLV) genome cloned in bacteriophage lambda gtWES.lambda B was used to localize viral genetic sequences required for transformation. Comparison of the biological activity of cloned A-MuLV genomic and subgenomic fragments showed that subgenomic clones that lacked the 5' long terminal repeat and adjoining sequences (300 base pairs downstream of the repeat) were not biologically active. In contrast, subgenomic clones that lacked the 3' long terminal repeat and as much as 1.3 kilobase pairs of the A-MuLV cell-derived abl gene were as efficient as wild-type viral DNA in transformation. The A-MuLV-encoded polyprotein P120 and its associated protein kinase activity were detected in transformants obtained by transfection with Cla I, BamHI, and HindIII subgenomic clones. In contrast, individual transformants obtained with subgenomic Sal I clones expressed A-MuLV proteins ranging in size from 82,000 to 95,000 daltons. Each demonstrated an associated protein kinase activity. These results provide direct genetic evidence that only the proximal 40% of abl with its associated 5' helper viral sequences is required for fibroblast transformation.
Molecular cloning and transcriptional analysis of the start gene CDC25 of Saccharomyces cerevisiae.
Martegani E, Baroni M, Frascotti G, Alberghina L EMBO J. 1986; 5(9):2363-2369.
PMID: 16453707 PMC: 1167121. DOI: 10.1002/j.1460-2075.1986.tb04505.x.
Busch H Mol Cell Biochem. 1984; 61(2):111-30.
PMID: 6374426 DOI: 10.1007/BF00222490.
Reddy E, Smith M, Srinivasan A Proc Natl Acad Sci U S A. 1983; 80(12):3623-7.
PMID: 6304726 PMC: 394102. DOI: 10.1073/pnas.80.12.3623.
Onc genes and other new targets for cancer chemotherapy.
Busch H J Cancer Res Clin Oncol. 1984; 107(1):1-14.
PMID: 6199358 DOI: 10.1007/BF00395484.
Browning P, BUNN H, Cline A, Shuman M, Nienhuis A Proc Natl Acad Sci U S A. 1986; 83(20):7800-4.
PMID: 3532121 PMC: 386809. DOI: 10.1073/pnas.83.20.7800.