title: Insecticidal activity of the CryIIA protein from the NRD-12 isolate of Bacillus thuringiensis subsp. kurstaki expressed in Escherichia coli and Bacillus thuringiensis and in a leaf-colonizing strain of Bacillus cereus.
abstract: A 4.0-kb BamHI-HindIII fragment encoding the cryIIA operon from the NRD-12 isolate of Bacillus thuringiensis subsp. kurstaki was cloned into Escherichia coli. The nucleotide sequence of the 2.2-kb AccI-HindIII fragment containing the NRD-12 cryIIA gene was identical to the HD-1 and HD-263 cryIIA gene sequences. Expression of cryIIA and subsequent purification of CryIIA inclusion bodies resulted in a protein with insecticidal activity against Heliothis virescens, Trichoplusia ni, and Culex quinquefasciatus but not Spodoptera exigua. The 4.0-kb BamII-HindIII fragment encoding the cryIIA operon was inserted into the B. thuringiensis-E. coli shuttle vector pHT3101 (pMAU1). pMAU1 was used to transform an acrystalliferous HD-1 strain of B. thuringiensis subsp. kurstaki and a leaf-colonizing strain of B. cereus (BT-8) by using electroporation. Spore-crystal mixtures from both transformed strains were toxic to H. virescens and T. ni but not Helicoverpa zea or S. exigua.
authors.affiliation: Department of Entomology, Auburn University, Alabama 36849.
authors.forename: W J
authors.initials: WJ
authors.lastname: Moar
authors.forename: J T
authors.initials: JT
authors.lastname: Trumble
authors.forename: R H
authors.initials: RH
authors.lastname: Hice
authors.forename: P A
authors.initials: PA
authors.lastname: Backman
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001409:Bacillus cereus / Q000235:genetics* / Q000378:metabolism; D001413:Bacillus thuringiensis / Q000235:genetics* / Q000378:metabolism; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics*; D001427:Bacterial Toxins; D001483:Base Sequence; D003001:Cloning, Molecular; D003227:Conjugation, Genetic; D003465:Culex; D004731:Endotoxins / Q000096:biosynthesis / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D006460:Hemolysin Proteins; D008969:Molecular Sequence Data; D010572:Pest Control, Biological; D017385:Sequence Homology
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis