PHI-4 Polypeptides Broaden Insect Control Spectrum
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Solution Overview
Problem
Current genetically engineered crops resistant to insect pests have limited efficacy against a narrow range of insects and face resistance issues, necessitating the development of new pesticidal proteins with broader insecticidal activity, especially against Lepidoptera and Hemiptera species, and biopesticides effective against pests resistant to existing pesticides.
Innovation Solution
The development of novel nucleic acid molecules encoding PHI-4 polypeptides with enhanced insecticidal activity, including amino acid substitutions, deletions, and insertions, for use in bacteria, plants, and microorganisms, which can be expressed to confer pest resistance and used in transgenic plants, formulations, and detection kits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If genetically engineered crops produce pesticidal proteins from Bacillus, then insect resistance is provided, but the resistance is limited to a narrow range of insect pests
Solution Approach 1:
The patent segments the pesticidal protein into distinct functional domains (N-terminal domain, C-terminal domain, hinge region) and creates modular variants by combining different domains from PHI-4 and other Bt proteins. This segmentation allows the protein to be customized for different insect pest groups while maintaining structural integrity and function.
Solution Approach 2:
The patent creates pesticidal proteins with multi-functional capabilities by designing variants that can target multiple insect orders (Lepidoptera, Coleoptera, Diptera, Hemiptera) simultaneously. The modular domain architecture enables a single protein construct to perform multiple insecticidal functions against diverse pest species.
2Reliability
If existing pesticidal proteins are used, then production cost is reduced, but insects develop resistance to different insecticidal compounds
Solution Approach 1:
The patent applies parameter changes by systematically modifying amino acid sequences, domain compositions, and structural configurations of pesticidal proteins. These parameter variations create novel protein variants with altered insecticidal spectra and enhanced effectiveness against resistant pest populations while maintaining manufacturability through standardized molecular biology techniques.
3Productivity
If biopesticides with broader insecticidal activity are developed, then pest control effectiveness is improved, but the complexity of protein engineering increases
Solution Approach 1:
The patent performs preliminary action by pre-characterizing the functional properties of different protein domains and their insecticidal activities against specific pest groups. This preliminary characterization data is used to rationally design and assemble optimized pesticidal protein variants with predictable broad-spectrum activity, reducing the need for extensive trial-and-error engineering.
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, as probes for the isolation of other homologous (or partially homologous) genes. The insecticidal 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.