title: A Bacillus thuringiensis subsp. israelensis gene encoding a 125-kilodalton larvicidal polypeptide is associated with inverted repeat sequences.
abstract: A gene encoding a 125-kilodalton (kDa) mosquitocidal delta-endotoxin was cloned from the 72-MDa resident plasmid of Bacillus thuringiensis subsp. israelensis. This gene is similar in its 3' region to the gene encoding the 135-kDa protein previously cloned (C. Bourgouin, A. Klier, and G. Rapoport, Mol. Gen. Genet. 205:390-397, 1986). Escherichia coli recombinant clones harboring the 125-kDa gene were toxic to larvae of the three mosquito species Aedes aegypti, Anopheles stephensi, and Culex pipiens. In addition, the B. thuringiensis subsp. israelensis DNA fragment carrying the 125-kDa protein gene contains two sets of inverted repeat sequences, identified either by the S1 nuclease method or by electron microscopic observation. The structural organization of inverted repeat sequences and of the 125-kDa gene was analyzed and suggests that this B. thuringiensis subsp. israelensis delta-endotoxin gene is located within a transposable element.
authors.affiliation: Département des Biotechnologies, Institut-Pasteur, Paris, France.
authors.forename: C
authors.initials: C
authors.lastname: Bourgouin
authors.forename: A
authors.initials: A
authors.lastname: Delécluse
authors.forename: J
authors.initials: J
authors.lastname: Ribier
authors.forename: A
authors.initials: A
authors.lastname: Klier
authors.forename: G
authors.initials: G
authors.lastname: Rapoport
mesh_terms: D000330:Aedes; D000818:Animals; D001413:Bacillus thuringiensis / Q000235:genetics*; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D003001:Cloning, Molecular; D003465:Culex; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000648:ultrastructure; D003720:Densitometry; D004720:Endonucleases; D004731:Endotoxins / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D006460:Hemolysin Proteins; D007118:Immunoassay; D007306:Insecticides; D008854:Microscopy, Electron; D009693:Nucleic Acid Hybridization; D010572:Pest Control, Biological; D012091:Repetitive Sequences, Nucleic Acid; D015719:Single-Strand Specific DNA and RNA Endonucleases
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004269:DNA, Bacterial; D004731:Endotoxins; D006460:Hemolysin Proteins; D007306:Insecticides; C030956:insecticidal crystal protein, Bacillus Thuringiensis; D004720:Endonucleases; D004262:DNA Restriction Enzymes; D015719:Single-Strand Specific DNA and RNA Endonucleases