Densovirus Coat Protein Fusion for Insect Toxin Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for insect pest control, such as chemical insecticides, face challenges like resistance development in insects and lack of target-specific effects, necessitating the need for environmentally friendly and economical alternatives that can effectively deliver insecticidal toxins to the hemocoel of target insects.
Innovation Solution
A fusion protein comprising a Junonia coenia densovirus (JcDNV) coat protein attached to an insect toxin via a peptide linker, which facilitates the transport of the toxin across the gut epithelium into the hemocoel of insects, allowing the toxin to act within the insect's body cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical insecticides are used for insect pest control, then insecticidal activity is achieved, but insect resistance develops and target-specific effects are lost
Solution Approach 1:
The patent uses a densovirus coat protein as an intermediary carrier to deliver the insect toxin across the gut epithelium. This mediator enables targeted delivery of the toxin to the hemocoel while the toxin gene can be customized for different insect pests, maintaining target-specific effects without the resistance issues of chemical insecticides
Solution Approach 2:
The insecticidal system is divided into separate functional components: the densovirus coat protein handles delivery and translocation across barriers, while the toxin portion provides the insecticidal activity. This segmentation allows the toxin to be optimized for specific pest targets while the delivery mechanism remains generalizable
2Manufacturing precision
If a fusion protein with densovirus coat protein is used to deliver toxin, then targeted delivery to hemocoel is achieved, but protein structure complexity increases
Solution Approach 1:
The patent merges two functional proteins into a single fusion protein: the densovirus coat protein (VP) that naturally translocates across the gut epithelium and the insect toxin that provides killing activity. This combination achieves targeted delivery to the hemocoel while using naturally occurring structural elements rather than artificial complex structures
Solution Approach 2:
The densovirus coat protein's natural translocation capability is exploited to deliver the toxin. The VP portion serves itself by using its inherent ability to cross the gut barrier, requiring no additional engineering for translocation function, thereby simplifying the overall delivery system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The fusion protein effectively delivers insecticidal toxins to the hemocoel, providing a novel approach for insect pest control that overcomes the limitations of existing methods by ensuring targeted action and reducing plant damage from insect infestations.
Implementation Method 1
facilitates the transport of the toxin across the gut epithelium into the hemocoel of insects
Data Source
AI summary
A coat protein of Junonia coenia densovirus (JcDNV) is used to deliver attached peptide insect toxin across the gut epithelium of a fall armyworm, Spodoptera frugiperda. A fusion protein comprising VP4 attached to an insect toxin via a peptide linker is developed. A composition comprising a JcDNV coat protein attached to an insect toxin via a peptide linker can be used for insect pest control.