title: Abelson murine leukemia virus: molecular cloning of infectious integrated proviral DNA.
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: D000011:Abelson murine leukemia virus / Q000235:genetics*; D000818:Animals; D010582:Bacteriophage lambda / Q000235:genetics; D002460:Cell Line; D002472:Cell Transformation, Viral; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004279:DNA, Viral / Q000235:genetics*; D003673:Defective Viruses / Q000235:genetics; D005786:Gene Expression Regulation; D005814:Genes, Viral; D009052:Leukemia Virus, Murine / Q000235:genetics*; D051379:Mice; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes