Recombinant Insecticidal Proteins for Broad-Spectrum Pest Control
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Solution Overview
Problem
Current genetically engineered crops resistant to insect pests have limited efficacy against a narrow range of pests and can develop resistance, necessitating the development of new pesticidal proteins with broader insecticidal activity.
Innovation Solution
Development of recombinant insecticidal polypeptides, such as IPD090, with specific amino acid substitutions and variants, which are used to create compositions and transgenic plants to control a wide range of insect pests including Lepidoptera and Coleoptera species, and their production through nucleic acid sequences and transformed prokaryotic cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If genetically engineered crops produce pesticidal proteins from Bacillus thuringiensis, then insect resistance is enhanced, but the range of insecticidal activity remains narrow
Solution Approach 1:
The patent combines multiple pesticidal protein genes (IPD090, IPD079, IPD082) into single transgenic plant constructs, creating crops that produce multiple different pesticidal proteins simultaneously. This merging approach broadens the spectrum of insect pest control while maintaining high reliability against resistant populations
Solution Approach 2:
The pesticidal proteins described in the patent exhibit multi-functional insecticidal activity against diverse insect orders including Lepidoptera, Coleoptera, Diptera, and Hemiptera. The proteins can function both as standalone toxic agents and as synergistic combinations, providing universal protection across multiple pest types
2Adaptability or versatility
If insects develop resistance to different insecticidal compounds, then alternative biological control agents are needed, but existing biopesticides have limited spectrum
Solution Approach 1:
The patent employs amino acid substitutions and mutations in pesticidal protein sequences to create variants with altered insecticidal properties. These parameter changes in protein structure allow the proteins to maintain effectiveness against insect populations that have developed resistance to wild-type proteins
Solution Approach 2:
The patent creates composite pesticidal formulations containing multiple different pesticidal proteins (e.g., IPD090 combined with IPD079 or IPD082) that work synergistically. This composite approach ensures reliable control of resistant pest populations by combining proteins with different modes of action and target specificities
Data Source
Figure 1A
Figure 1B
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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.