title: Adenovirus DNA-directed transcription of 5.5S RNA in vitro.
abstract: A cell-free system developed from human KB cells was used to transcribe 5.5S RNA from deproteinized adenovirus DNA in vitro. The cell-free RNA synthesis is dependent upon exogenous templates, ribonucleoside triphosphates, and cell-free postmitochondrial supernatant of human KB cells. The synthesis of 5.5S RNA is inhibited only by high levels of alpha-amanitin; therefore it is carried out by RNA polymerase III. The rate of synthesis was linear for at least 2 hr, indicating reinitiation. The 5.5S RNA synthesized in vitro is similar to the corresponding in vivo RNA in size, sequence, and coding region on adenovirus type 2 DNA. In this report is demonstrated in vitro synthesis of a facsimile of an in vivo transcript directed by deproteinized DNA in a mammalian cell-free postmitochondrial supernatant system.
mesh_terms: D000260:Adenoviruses, Human / Q000235:genetics*; D002460:Cell Line; D002474:Cell-Free System; D003600:Cytosol / Q000378:metabolism; D004279:DNA, Viral / Q000235:genetics; D005814:Genes, Viral; D007700:Kinetics; D008970:Molecular Weight; D012320:RNA Polymerase III / Q000378:metabolism; D012367:RNA, Viral / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral; D012320:RNA Polymerase III