Bacillus thuringiensis and Its Pesticidal Crystal Proteins
نویسندگان
چکیده
منابع مشابه
Bacillus thuringiensis and its pesticidal crystal proteins.
During the past decade the pesticidal bacterium Bacillus thuringiensis has been the subject of intensive research. These efforts have yielded considerable data about the complex relationships between the structure, mechanism of action, and genetics of the organism's pesticidal crystal proteins, and a coherent picture of these relationships is beginning to emerge. Other studies have focused on t...
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The crystal proteins of Bacillus thuringiensis have been extensively studied because of their pesticidal properties and their high natural levels of production. The increasingly rapid characterization of new crystal protein genes, triggered by an effort to discover proteins with new pesticidal properties, has resulted in a variety of sequences and activities that no longer fit the original nome...
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Bacillus thuringiensis (Bt) crystal proteins are pore-forming toxins used as insecticides around the world. Previously, the extent to which these proteins might also target the invertebrate phylum Nematoda has been mostly ignored. We have expressed seven different crystal toxin proteins from two largely unstudied Bt crystal protein subfamilies. By assaying their toxicity on diverse free-living ...
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This document reviews the safety assessment for Bacillus thuringiensis (Bt) delta-endotoxin proteins that have been introduced into agricultural crops to provide protection against insect pests. Information is provided on the scientific basis for U.S. EPA approvals for the introduction of Bt proteins into agricultural crops. Relevant to these approvals is the extensive data base on Bt protein s...
متن کاملReceptors and Lethal Effect of Bacillus thuringiensis Insecticidal Crystal Proteins to the Anticarsia gemmatalis (Lepidoptera, Noctuidae)
Bioassays with insecticidal crystal proteins (ICPs) from Bacillus thuringiensis have demonstrated that Cry1Aa, Cry1Ac, and Cry1Ba are the most active toxins on larvae of the Anticarsia gemmatalis. The toxins Cry1Da and Cry1Ea are less toxic, and toxins Cry2Aa are not active. Binding of these ICPs to midgut sections of the A. gemmatalis larvae was studied using streptavidin-mediated detection. T...
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ژورنال
عنوان ژورنال: Microbiology and Molecular Biology Reviews
سال: 1998
ISSN: 1092-2172,1098-5557
DOI: 10.1128/mmbr.62.3.775-806.1998