A Bacillus thuringiensis insecticidal crystal protein with a high activity against members of the family Noctuidae
Article Abstract:
Cry9Ca1 is an insecticidal crystal protein from Bacillus thuringiensis serovar tolworthi that is active against lepidopteran insects from the families Pyralidae, Plutellidae, Sphingidae, and Noctuidae, among others. The protein has specific receptor-binding features and a wide range of activity. It is the first to be active against cutworms but has no activity against some beetles. Cry1Ab5 recognizes a receptor different from that recognized by Cry9Ca1, in Ostrinia nubilalis and Plutella xylostella. In Spodoptera exigua and P. xylostella, Cry9Ca1 binds to the same receptor as Cry1Cax, though with lower affinity.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Enhanced production of insecticidal proteins in Bacillus thuringiensis strains carrying an additional crystal protein gene in their chromosomes
Article Abstract:
A two-step method to stably integrate an extra crystal protein gene into Bacillus thuringiensis chromosomes may have general applicability to increasing the bacterium's insecticidal activity. The aizawai strain cryIC gene was first integrated into the kurstaki strain HD73 chromosome, which contains only one crystal gene. This decreased the chances of the homologous recombination event disrupting a resident cry gene. By generalized transduction, the integrated cryIC gene was then transfered to kurstaki strains with multiple cry genes.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1995
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