title: Construction and characterization of an Escherichia coli strain with a uncI mutation.
abstract: A strain of Escherichia coli with a mutation in the promoter proximal gene ( uncI ) of the unc operon has been constructed by using a new gene replacement method. The mutation is a deletion of a defined sequence of 196 base pairs. It was constructed by homologous integration and segregation of a ColE1-derived recombinant plasmid containing the mutation, in a temperature-sensitive polA strain. The mutant strain is phenotypically unc+ but has a reduced growth yield compared to a normal sibling strain.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005796:Genes; D005798:Genes, Bacterial; D005838:Genotype; D009154:Mutation; D009693:Nucleic Acid Hybridization; D009876:Operon; D006180:Proton-Translocating ATPases / Q000235:genetics*; D013045:Species Specificity
chemical_list: D004262:DNA Restriction Enzymes; D006180:Proton-Translocating ATPases