title: Further characterization of conditional lethal amber nonsense mutants of vesicular stomatitis virus: nucleotide sequence analysis.
abstract: Conditional lethal amber nonsense mutants of vesicular stomatitis virus, Indiana serotype, classified in complementation group I (the L gene), synthesize truncated versions of the L protein. This paper reports further characterization of mutants AmbL1, AmbL2 and AmbL3 by nucleic acid sequence analysis, which was achieved by sequencing L mRNA directly using appropriate synthetic oligonucleotides. In each case a single point mutation altered a glutamine-specifying codon to an amber stop codon. The L mRNA from wild-type and revertant viruses was sequenced for comparison. Of the revertants sequenced, each had reverted by back mutation within the same codon as the original mutation. A revertant of AmbL2 reverted by a second site mutation, also within the same codon as the original mutation. These mutants may be useful for assigning functions to different parts of the L polypeptide chain.
authors.affiliation: MRC Virology Unit, University of Glasgow, U.K.
authors.forename: B T
authors.initials: BT
authors.lastname: White
authors.forename: R M
authors.initials: RM
authors.lastname: Elliott
mesh_terms: D001483:Base Sequence; D002460:Cell Line; D004252:DNA Mutational Analysis; D004591:Electrophoresis, Polyacrylamide Gel; D005804:Genes, Lethal; D005814:Genes, Viral; D009154:Mutation; D012367:RNA, Viral / Q000032:analysis; D012324:RNA-Dependent RNA Polymerase; D014721:Vesicular stomatitis Indiana virus / Q000235:genetics*; D014764:Viral Proteins / Q000096:biosynthesis / Q000235:genetics*
chemical_list: D012367:RNA, Viral; D014764:Viral Proteins; C040530:L protein, vesicular stomatitis virus; D012324:RNA-Dependent RNA Polymerase