Bioactive Polypeptides for Insect Pest Control via Chitinase Activity
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Solution Overview
Problem
Current methods for controlling insect pests rely heavily on chemical pesticides, which face resistance issues and environmental concerns, necessitating the development of alternative biocontrol agents.
Innovation Solution
The use of bioactive polypeptides from Brevibacillus laterosporus strains, specifically polypeptides with glycoside hydrolase and chitinase activities, are applied to control insect pests through compositions that can be used in agricultural settings to reduce pest infestations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical insecticides and pesticides are used to control insect pests, then pest control effectiveness is improved, but insect resistance develops and environmental harm increases
Solution Approach 1:
The patent changes the chemical composition parameter from conventional synthetic insecticides to bioactive polypeptides with specific molecular structures and modes of action, thereby maintaining pest control effectiveness while eliminating resistance development and environmental harm
Solution Approach 2:
The patent employs polypeptides that are biodegradable and environmentally benign, replacing persistent chemical insecticides with short-lived biological agents that decompose naturally, preventing accumulation and environmental damage
2Object-affected harmful factors
If biological control agents are used to reduce chemical dependence, then environmental safety is improved, but pest control effectiveness may be reduced
Solution Approach 1:
The patent creates composite biological control formulations containing multiple polypeptides with different modes of action (e.g., pore-forming toxins, proteases, nucleases) working synergistically to achieve high pest control effectiveness while maintaining environmental safety
Solution Approach 2:
The patent segments the pest control function into multiple distinct polypeptide mechanisms (pore formation, protein degradation, nucleic acid degradation) rather than relying on a single chemical mode of action, thereby achieving both effectiveness and environmental compatibility
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
These polypeptides demonstrate effective insecticidal activity against agriculturally important pests, offering a sustainable and resistant alternative to traditional chemical controls, reducing the risk of environmental harm.
Implementation Method 1
m) a polypeptide comprising or consisting of at least about 10 contiguous amino acids from any one of a) to l) above, wherein said polypeptide has glycoside hydrolase activity
Implementation Method 2
n) a polypeptide comprising or consisting of at least about 10 contiguous amino acids from any one of a) to m) above, wherein said polypeptide has chitinase activity or one or more chitinase domains
Data Source
AI summary
The invention relates to bioactive polypeptides from strains of Brevibacillus laterosporus which have useful activity including pesticidal activity such as insecticidal activity, compositions comprising said polypeptides, and methods for using the polypeptides and compositions, for example in methods of controlling agriculturally-important pests including insect pests.