title: In vitro synthesis of genome length complementary RNA of vesicular stomatitis virus in the presence of inosine 5'-triphosphate.
abstract: The virion-associated RNA polymerase of vesicular stomatitis virus (VSV) synthesizes RNA in vitro when GTP is replaced by inosine 5'-triphosphate (ITP). The synthesis is optimal at an ITP concentration of 200 microM and the extent of synthesis is between 15 to 20% compared to normal transcription in the presence of GTP. Analyses of the RNA products revealed that approximately 10% of the product RNA represented plus-strand complement of the genome RNA. Defective interfering particles of VSV were also capable of synthesizing complementary RNA in the presence of ITP, in addition to 46-base RNA, although in lesser amount (2%). Since I substitution facilitates read-through of the genome RNA, these results suggest that interaction of the product RNA with the genome template or ITP-mediated modification of a viral protein may be involved in the read-through process in vitro.
mesh_terms: D003673:Defective Viruses / Q000378:metabolism; D005814:Genes, Viral; D007292:Inosine Nucleotides / Q000378:metabolism*; D007293:Inosine Triphosphate / Q000378:metabolism*; D012367:RNA, Viral / Q000096:biosynthesis* / Q000235:genetics; D012324:RNA-Dependent RNA Polymerase; D014721:Vesicular stomatitis Indiana virus / Q000235:genetics / Q000378:metabolism*
chemical_list: D007292:Inosine Nucleotides; D012367:RNA, Viral; D007293:Inosine Triphosphate; D012324:RNA-Dependent RNA Polymerase