IPD102 Polypeptides Broaden Insect Resistance Spectrum
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Solution Overview
Problem
Current genetically engineered crops resistant to insect pests have limited effectiveness against a narrow range of pests and can develop resistance, necessitating the development of new pesticidal proteins with broader activity and different modes of action.
Innovation Solution
Development of novel nucleic acid sequences encoding IPD102 polypeptides with amino acid substitutions, deletions, and fragments, which can be used to transform bacteria and plants to produce pesticidal proteins active against Lepidopteran, Coleopteran, nematode, fungal, and Dipteran pests, and include methods for detecting these proteins and producing transgenic plants with enhanced pest resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If genetically engineered crops produce pesticidal proteins from Bacillus, then insect resistance is enhanced, but the spectrum of activity remains narrow
Solution Approach 1:
The patent applies universality by engineering crops to produce multiple different pesticidal proteins simultaneously (e.g., Cry1Ab, Cry1Ac, Cry2Ab, Vip3A) that target different insect orders including Lepidoptera, Coleoptera, Diptera, and Hymenoptera. This multi-functional approach allows a single crop variety to resist diverse pest species beyond the narrow spectrum of traditional Bt crops.
Solution Approach 2:
The patent employs composite materials by combining multiple pesticidal protein sequences into a single expression cassette or stacked genetic constructs within the same crop plant. This composite strategy creates synergistic pest resistance where different protein families (crystal proteins, vegetative insecticidal proteins) work together to expand the overall spectrum of activity while maintaining reliability against resistant strains.
2Productivity
If existing insecticidal compounds are used, then pest control is achieved, but insects develop resistance
Solution Approach 1:
The patent applies dynamics by implementing a rotating pest management strategy where crops expressing different pesticidal protein combinations are deployed in sequence or rotation. This dynamic approach prevents insects from adapting to a single static toxin, thereby delaying resistance development while maintaining sustained productivity across growing seasons.
Solution Approach 2:
The patent utilizes parameter changes by varying the spectral composition of pesticidal activity through selection of different protein sequences (e.g., switching between Cry1, Cry2, Vip3 families with distinct modes of action). This changes the biochemical parameters of pest control, ensuring that when resistance develops to one protein type, alternative protein types with different mechanisms remain effective.
3Adaptability or versatility
If broad-spectrum chemical insecticides are used, then pest control coverage is improved, but environmental pollution and hazards increase
Solution Approach 1:
The patent replaces mechanical/chemical insecticide application systems with a biological control system where transgenic crops autonomously produce pesticidal proteins. This substitution eliminates the need for external chemical applications while maintaining broad-spectrum pest control coverage, thereby reducing environmental pollution and hazards associated with synthetic insecticides.
Solution Approach 2:
The patent implements self-service by engineering crops to autonomously synthesize and deploy their own pesticidal proteins (e.g., Cry and Vip proteins) in response to pest presence. This self-service mechanism replaces manual chemical insecticide applications, providing broad-spectrum protection while eliminating the environmental hazards of external chemical inputs.
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.