title: Antibody to a host protein prevents initiation by the poliovirus replicase.
abstract: In vitro transcription of poliovirus RNA was catalyzed by the combination of a virus-coded polymerase and a host cell protein (host factor). Antibody to host factor inhibited template-dependent synthesis of complementary RNA where presumably RNA chain initiation occurred. On the contrary, elongation of already initiated RNA chains catalyzed by the replicase-template complex was not inhibited by anti-host factor antibody. These results strongly favored our previous notion that the host factor was needed for the initiation step of viral complementary RNA synthesis.
mesh_terms: D000906:Antibodies; D006367:HeLa Cells; D006801:Humans; D017955:Poliovirus / Q000378:metabolism*; D011506:Proteins / Q000276:immunology / Q000502:physiology*; D012316:RNA Nucleotidyltransferases / Q000378:metabolism*; D012367:RNA, Viral / Q000096:biosynthesis*; D012324:RNA-Dependent RNA Polymerase / Q000378:metabolism*
chemical_list: D000906:Antibodies; D011506:Proteins; D012367:RNA, Viral; D012316:RNA Nucleotidyltransferases; D012324:RNA-Dependent RNA Polymerase