Bacillus thuringiensis Insecticidal Proteins for Broad-Spectrum Pest Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for controlling insect pests in agriculture rely heavily on chemical pesticides, which pose environmental hazards and have limited specificity, while genetically engineered crops provide only narrow resistance to certain pests, necessitating the development of new Bacillus thuringiensis toxins with broader insecticidal activity.
Innovation Solution
The use of novel nucleic acid sequences encoding insecticidal peptides to produce transformed microorganisms and plants that express enhanced pesticidal polypeptides, specifically optimized for increased expression and activity against a wider range of insect pests, including Lepidopterans, through optimized codon usage and mutagenesis to introduce protease-sensitive sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broad-spectrum chemical insecticides are used to control insect pests, then insect pest populations are reduced, but environmental hazards increase and target specificity decreases
Solution Approach 1:
The patent extracts and utilizes only the specific pesticidal protein components from Bacillus thuringiensis that target insect pests, separating them from the complete bacterial organism. This allows selective delivery of insecticidal activity without the environmental concerns associated with broad-spectrum chemical insecticides, achieving both effectiveness and environmental safety
Solution Approach 2:
The patent employs Bacillus thuringiensis spores and pesticidal proteins as intermediary agents between the developer and the insect pest. These natural biological agents mediate pest control through species-specific mechanisms, providing targeted action that reduces environmental impact compared to chemical insecticides while maintaining reliable pest suppression
2Reliability
If genetically engineered crops producing pesticidal proteins are used, then insect resistance is improved, but the range of active insect pests remains narrow
Solution Approach 1:
The patent develops a universal pesticidal protein composition from Bacillus thuringiensis that can target multiple orders of insect pests simultaneously. By incorporating diverse pesticidal proteins with different specificities, the composition achieves multi-functionality, expanding the range of controlled pests while maintaining reliable resistance in genetically engineered crops
Solution Approach 2:
The patent creates a composite pesticidal protein composition containing multiple different pesticidal proteins from Bacillus thuringiensis. This composite approach combines proteins with activity against different insect orders (Lepidoptera, Diptera, Coleoptera, Hemiptera), thereby expanding the versatility and range of protected crops while maintaining effective resistance
3Object-affected harmful factors
If traditional Bacillus thuringiensis pesticidal proteins are used, then environmental friendliness is maintained, but insecticidal activity against diverse pests is insufficient
Solution Approach 1:
The patent merges multiple pesticidal protein genes from Bacillus thuringiensis into a single recombinant expression construct. This combination approach integrates the environmental safety of natural Bt proteins with expanded insecticidal activity, as the merged composition targets multiple pest orders simultaneously while remaining environmentally benign
Solution Approach 2:
The patent engineers pesticidal protein compositions with universal activity across multiple insect orders. By selecting and combining proteins that target different pest groups (Lepidoptera, Diptera, Coleoptera, Hemiptera), the composition achieves broad-spectrum biological control while maintaining the environmental safety characteristics of natural Bt agents
Data Source
AI summary
The invention provides nucleic acids, and variants and fragments thereof, obtained from strains of Bacillus thuringiensis encoding polypeptides having pesticidal activity against insect pests, including Lepidoptera. Particular embodiments of the invention provide isolated nucleic acids encoding pesticidal proteins, pesticidal compositions, DNA constructs, and transformed microorganisms and plants comprising a nucleic acid of the embodiments. These compositions find use in methods for controlling pests, especially plant pests.