title: In vitro transcription of viroid RNA into full-length copies by RNA-dependent RNA polymerase from healthy tomato leaf tissue.
abstract: RNA-dependent RNA polymerase from healthy tomato plant tissue accepts potato spindle tuber viroid (PSTV) RNA as a template for the in vitro synthesis of full-length RNA copies of the PSTV genome. Viroid transcription requires the presence of Mn2+ and /or Mg2+ ions and is not inhibited by concentrations of 10(-5) M alpha-amanitin. This is the first report of a well-defined product synthesized in vitro by an RNA-dependent RNA polymerase from healthy plants.
mesh_terms: D000546:Amanitins / Q000494:pharmacology; D008274:Magnesium / Q000494:pharmacology; D008345:Manganese / Q000494:pharmacology; D009693:Nucleic Acid Hybridization; D010944:Plants / Q000201:enzymology*; D012316:RNA Nucleotidyltransferases / Q000378:metabolism*; D012367:RNA, Viral / Q000096:biosynthesis*; D012324:RNA-Dependent RNA Polymerase / Q000378:metabolism*; D013698:Templates, Genetic; D014158:Transcription, Genetic / Q000187:drug effects; D014772:Viroids / Q000378:metabolism*
chemical_list: D000546:Amanitins; D012367:RNA, Viral; D008345:Manganese; D012316:RNA Nucleotidyltransferases; D012324:RNA-Dependent RNA Polymerase; D008274:Magnesium