doi: 10.1099/00221287-133-10-2921.
Cloning and expression in Escherichia coli of an insecticidal crystal protein gene from Bacillus thuringiensis var. aizawai HD-133
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- PMID: 3329679
- DOI: 10.1099/00221287-133-10-2921
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Cloning and expression in Escherichia coli of an insecticidal crystal protein gene from Bacillus thuringiensis var. aizawai HD-133
J Gen Microbiol.
1987 Oct.
Abstract
Using a gene probe derived from the cloned var. sotto insecticidal crystal protein (ICP) gene, we have cloned a Bacillus thuringiensis var. aizawai HD-133 ICP gene in Escherichia coli. The gene encodes a polypeptide that is toxic to Lepidoptera in vivo and in vitro. The protein is expressed at a level sufficient to produce phase-bright inclusions in recombinant E. coli strains, and these inclusions can be partially purified using discontinuous sucrose density gradients. Immunoblotting shows that the inclusions contain a 135 kDa polypeptide which reacts strongly with antiserum raised against the B. thuringiensis var. kurstaki HD-1 P1 polypeptide.
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