title: Studies of the transcription of viral genome in adenovirus 5 transformed cells.
abstract: Transcription of the human adenovirus 5 genome in transformed rat embryo cells (DFK3) was investigated using two different approaches. Preferential digestion of transcribed viral sequences by DNase I was analysed using kinetics of renaturation of 32P-labeled Ad5 HpaI restriction fragments in the presence of material which was stable after nuclease treatment. The second approach was the hybridization of 32P-labeled nuclear RNA from transformed cells with Ad5 restriction fragments which were attached to a nitrocellulose filter. These two methods gave similar results. It was found that not all integrated regions of the Ad5 genome are active in transformed cells. 2,5 copies of the HpaI-E fragment of Ad5 DNA were found in transformed DFK3 cell line. Nuclear RNA from these cells hybridized to HpaI-E fragment of Ad5 DNA, but only about half of sequences of the integrated HpaI-E fragment was sensitive to DNase I digestion.
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D001483:Base Sequence; D002460:Cell Line; D002472:Cell Transformation, Viral; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000235:genetics; D005814:Genes, Viral; D012367:RNA, Viral / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral; D004262:DNA Restriction Enzymes