title: The recovery of a B2 insertion in the lacI gene of a rat cell line containing a lambda/LIZ shuttle vector.
abstract: The bacterial lacI gene is in use as a reporter gene for mutation in transgenic mice, rats and in cell lines. During a mutagenesis study in which we used such a rat cell line, we recovered a mutant which features an insertion of a rat B2 repeated sequence element. This sequence element was inserted between positions 77 and 78 in the lacI gene. When the inserted sequence was compared to the published rat B2 sequences, two short deletions, possibly mediated by short repeat sequences, were revealed. This is the first demonstration of the recovery of a repeated sequence element into the lacI gene used in transgenic animals and cell lines, and confirms previous findings that such sequences indeed move around the genome.
authors.affiliation: Department of Biology, University of Victoria, BC, Canada.
authors.forename: J G
authors.initials: JG
authors.lastname: de Boer
authors.forename: A
authors.initials: A
authors.lastname: Suri
authors.forename: D
authors.initials: D
authors.lastname: Walsh
authors.forename: B W
authors.initials: BW
authors.lastname: Glickman
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D001426:Bacterial Proteins / Q000187:drug effects / Q000235:genetics*; D010582:Bacteriophage lambda / Q000235:genetics; D001483:Base Sequence; D002460:Cell Line; D004251:DNA Transposable Elements; D029968:Escherichia coli Proteins; D005347:Fibroblasts; D005822:Genetic Vectors / Q000235:genetics*; D056968:Lac Repressors; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D051381:Rats; D012091:Repetitive Sequences, Nucleic Acid; D012097:Repressor Proteins / Q000187:drug effects / Q000235:genetics*; D016415:Sequence Alignment; D012689:Sequence Homology, Nucleic Acid; D014812:Vitamin K / Q000494:pharmacology
chemical_list: D001426:Bacterial Proteins; D004251:DNA Transposable Elements; D029968:Escherichia coli Proteins; D056968:Lac Repressors; D012097:Repressor Proteins; D014812:Vitamin K