Abstract
The integrated proviral genome of Abelson murine leukemia virus (A-MuLV) was cloned in lambda gtWES . lambda B bacteriophage after EcoRI endonuclease digestion and enrichment of proviral sequences by sequential RPC-5 column chromatography and agarose gel electrophoresis. Recombinant DNA clones containing a 7.8-kilobase-pair EcoRI insert were shown to have the entire integrated A-MuLV genome with both 5' and 3' ends flanked by mink cellular DNA sequences. This DNA fragment was shown to induce focus transformation upon transfection of NIH/3T3 mouse cells. Moreover, focus-forming virus could be rescued from transformed nonproducer cells upon superinfection with a type C helper virus. A polyprotein of molecular weight 120,000 (p120) containing murine leukemia virus gag gene determinants was invariably deteced by immunoprecipitation analysis of individual transformants induced by the 7.8-kilobase-pair DNA. Molecularly cloned integrated A-MuLV in its infectious form should be of use in elucidating the mechanisms involved in transformation by this virus.
MeSH Terms
Abelson murine leukemia virus/genetics
Animals
Bacteriophage lambda/genetics
Cell Line
Cell Transformation, Viral
Cloning, Molecular
DNA Restriction Enzymes/metabolism
DNA, Viral/genetics
Defective Viruses/genetics
Gene Expression Regulation
Genes, Viral
Leukemia Virus, Murine/genetics
Mice
Virus Replication
Chemicals
DNA, Viral
DNA Restriction Enzymes
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Srinivasan A
Reddy E P
Aaronson S A
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