Bacillus thuringiensis Nucleic Acids for Broad-Spectrum Lepidopteran Control
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Solution Overview
Problem
Current methods for controlling insect pests in agriculture rely heavily on chemical pesticides, which pose environmental hazards and have limited effectiveness against a broad range of insect pests, particularly those from the order Lepidoptera, necessitating the development of alternative, environmentally friendly solutions with broader insecticidal activity.
Innovation Solution
The use of nucleic acids encoding novel insecticidal peptides from Bacillus thuringiensis genes to produce transformed microorganisms and plants that express pesticidal polypeptides, providing enhanced insect resistance and broader insecticidal activity against pests like the European corn borer and Southwestern corn borer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broad-spectrum chemical insecticides are used to control insect pests, then insect pest populations are impacted, but environmental hazards and pollution increase
Solution Approach 1:
The patent changes the chemical nature of pesticides from broad-spectrum synthetic chemicals to biologically-derived Bt toxins with specific spectral characteristics. By modifying the source and type of pesticidal agent (from chemical to biological), the solution maintains pest control effectiveness while eliminating environmental hazards associated with synthetic pesticides
Solution Approach 2:
The patent converts the previously harmful effect of broad-spectrum pesticides (environmental pollution) into a benefit by using highly specific Bt toxins that target only certain insect orders. The specificity that once limited utility now becomes an environmental advantage, as non-target organisms are spared
2Object-affected harmful factors
If existing Bt toxins are used for pest control, then environmental friendliness is improved, but insecticidal activity range remains narrow
Solution Approach 1:
The patent creates a multi-functional Bt toxin composition that can target multiple insect orders (Lepidoptera, Diptera, Coleoptera, Hemiptera) simultaneously. By combining different Bt toxins with complementary spectra or using a toxin with unusually broad activity, the composition achieves universal applicability across diverse pest types while maintaining environmental safety
Solution Approach 2:
The patent employs composite Bt toxin formulations that combine multiple pesticidal proteins with different target specificities. This composite approach allows a single product to address diverse pest populations across multiple insect orders, expanding the effective range while preserving the environmentally benign characteristics of individual Bt toxins
3Reliability
If genetically engineered crops producing narrow-spectrum Bt toxins are deployed, then resistance to specific pests is improved, but effectiveness against other economically important insect pests is limited
Solution Approach 1:
The patent develops genetically engineered crops that produce composite Bt toxin proteins capable of targeting multiple insect orders. Rather than expressing a single narrow-spectrum toxin, the crops produce formulations that provide broad-spectrum protection against Lepidoptera, Diptera, Coleoptera, and Hemiptera pests simultaneously
Solution Approach 2:
The patent creates transgenic crops that express composite pesticidal protein formulations combining multiple Bt toxin variants. This composite expression strategy ensures that the crop provides reliable protection against specific target pests while simultaneously maintaining effectiveness against other economically important insect species that would be vulnerable to at least one component toxin
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.