title: Nucleotide sequence of a DNA fragment that contains the abi gene of the ColIb plasmid.
abstract: A 1989-bp PstI DNA fragment from the ColIb plasmid, which contains the abi gene that is necessary for the abortive response to infections by bacteriophage BF23 or T5, was sequenced. A candidate open reading frame for the abi gene has been suggested on the basis of a Shine-Dalgarno sequence appropriately placed ahead of its ATG initiation codon, a promoter upstream from the Shine-Dalgarno sequence, and a location compatible with deletion mapping. The polypeptide that would be coded by this open reading frame is 89 amino acids long and strongly hydrophobic. A promoter that could serve this open reading frame was detected by exonuclease III "footprinting" using RNA polymerase from uninfected Escherichia coli as the DNA-binding protein.
authors.affiliation: Department of Biochemistry, Medical College of Ohio, Toledo 43699.
authors.forename: S K
authors.initials: SK
authors.lastname: Gupta
authors.forename: D J
authors.initials: DJ
authors.lastname: McCorquodale
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003090:Coliphages / Q000235:genetics / Q000502:physiology*; D004269:DNA, Bacterial / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D010957:Plasmids; D015183:Restriction Mapping
chemical_list: D004269:DNA, Bacterial