The Bacillus thuringiensis vegetative insecticidal protein Vip3A lyses midgut epithelium cells of susceptible insects

Article Abstract:

The binding of the Bacillus thuringiensis vegetative insecticidal protein Vip3A to the gut epithelial cells causes death of several lepidopteran insects. The effect of Vip3A is similar to that caused by the ingestion of delta-endotoxins by insects. The proteolysis of Vip3A by susceptible insects such as the black cutworm is similar to that by nonsusceptible insects such as the European corn borer. However, Vip3A binds to the epithelial cells only in susceptible insects. Thus, the binding and lysis of the epithelial cells is the cause of the Vip3A lethality.

Microbial insecticides

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Molecular and insecticidal characterization of a Cry11 protein toxic to insects of the families Noctuidae, Tortricidae, Plutellidae and Chrysomelidae

Article Abstract:

The molecular and insecticidal characterization of a novel 'cry' gene encoding a protein of the Cry11 group is reported with toxic activity towards insects of the families Noctuidae, Tortricidae, Plutellidae and Chrysomelidae. A discussion is presented on the potential of Cry1Ia7 as an active ingredient that can be used in combination with Cry1Ab or Cry1Ac in pest control and the management of resistance to Bacillus thuringiensis toxins.

Science & research, Analysis, Genetic aspects, Protein binding, Amino acid sequence, Amino acid sequencing

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