PtIP-96 Polypeptides Broaden Insect Resistance in Transgenic Crops
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Solution Overview
Problem
Current genetically engineered crops that produce pesticidal proteins from Bacillus strains provide resistance only to a narrow range of insect pests, and there is a need for new pesticidal proteins with broader insecticidal activity, especially against pests that have developed resistance to existing insecticides.
Innovation Solution
The development of novel genes encoding Pteridophyta and Lycopodiophyta Insecticidal Protein-96 (PtIP-96) polypeptides, which can be used to transform bacteria, plants, and seeds to confer pesticidal activity against a variety of insect pests, including Lepidoptera and Coleoptera species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If genetically engineered crops produce pesticidal proteins from Bacillus strains, then insect resistance is improved, but the range of insecticidal activity remains narrow
Solution Approach 1:
The patent applies universality by engineering crops to produce multiple different pesticidal proteins simultaneously (e.g., Cry1Ab, Cry1F, Cry3Bb1) to achieve broad-spectrum insect control across multiple orders (Lepidoptera, Coleoptera, Diptera, Hemiptera), transforming a single-function system into a multi-functional one that addresses diverse pest threats
2Reliability
If existing insecticides are used repeatedly, then pest control effectiveness is maintained initially, but insects develop resistance over time
Solution Approach 1:
The patent implements periodic action through the sequential expression of different pesticidal proteins with distinct modes of action and target specificities. By rotating or combining proteins that affect insects at different developmental stages or through different mechanisms, the system prevents resistance development that would occur with continuous exposure to a single insecticidal agent
Solution Approach 2:
The patent applies composite materials by combining multiple pesticidal proteins with different biochemical properties and mechanisms of action within the same crop plant. This composite approach creates a synergistic effect where the combination of proteins provides sustained pest control and delays resistance development compared to individual proteins alone
Data Source
AI summary
Compositions and methods for controlling pests are provided. The methods involve transforming organisms with a nucleic acid sequence encoding an insecticidal protein. In particular, the nucleic acid sequences are useful for preparing plants and microorganisms that possess insecticidal activity. Thus, transformed bacteria, plants, plant cells, plant tissues and seeds are provided. Compositions are insecticidal nucleic acids and proteins of bacterial species. The sequences find use in the construction of expression vectors for subsequent transformation into organisms of interest including plants, as probes for the isolation of other homologous (or partially homologous) genes. The pesticidal proteins find use in controlling, inhibiting growth or killing Lepidopteran, Coleopteran, Dipteran, fungal, Hemipteran and nematode pest populations and for producing compositions with insecticidal activity.