Corn-Produced Spider Silk Proteins via Fluorescent DNA Constructs
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Solution Overview
Problem
Current methods for producing spider silk are labor-intensive, expensive, and inefficient, and the production of synthetic spider silk proteins in plants faces challenges due to genetic instability and degradation of glycine and alanine-rich proteins.
Innovation Solution
The development of DNA constructs that integrate synthetic spider silk protein coding sequences with fluorescent markers into plant genomes, specifically in corn endosperm and shoot tissues, to facilitate stable expression and identification of spider silk proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional methods (silkworm or spider) are used to produce spider silk, then the silk can be obtained with natural properties, but the production process is labor-intensive, expensive, and inefficient
Solution Approach 1:
The patent creates synthetic spider silk proteins by copying the natural amino acid sequences of spider silk (particularly the repetitive glycine-alanine-rich patterns) and expressing them in plant systems. This allows production of silk-like proteins without using actual spiders or silkworms, dramatically improving productivity while maintaining the characteristic mechanical properties of natural spider silk
Solution Approach 2:
The patent uses plants as an intermediary host system to produce spider silk proteins. The plant endosperm and shoot tissues serve as factories for synthesizing the silk proteins, which are then extracted and processed. This intermediary approach avoids the labor-intensive rearing of silkworms or capture of spiders while efficiently producing high-quality silk proteins
2Productivity
If synthetic spider silk proteins are produced in plants, then production cost and efficiency improve, but genetic instability and degradation of glycine and alanine-rich proteins occur
Solution Approach 1:
The patent optimizes several parameters to ensure genetic stability: (1) designing DNA constructs with appropriate codon usage for plant expression systems, (2) selecting specific plant hosts (corn endosperm and shoot tissues) that provide stable expression environments, (3) optimizing the structural design of synthetic silk genes to prevent degradation, and (4) controlling expression conditions to maintain protein integrity throughout the production process
3Productivity
If spider silk proteins are produced in plant endosperm and shoot tissues, then renewable and cost-effective fiber production is achieved, but identification and detection of the expressed proteins becomes challenging
Solution Approach 1:
The patent employs fluorescent markers that emit specific colors when excited by appropriate wavelengths of light. These markers are genetically fused to the spider silk protein sequences, allowing researchers to visually detect and locate the expressed proteins in plant tissues using fluorescence microscopy. The color-changing property provides a simple, sensitive, and specific detection method that overcomes the difficulty of identifying silk proteins in complex plant protein backgrounds
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
Enables the efficient production and identification of spider silk proteins in plant tissues, overcoming genetic instability and degradation issues, and providing a renewable and cost-effective method for producing high-strength, flexible fibers.
Implementation Method 1
DNA constructs that integrate synthetic spider silk protein coding sequences with fluorescent markers into plant genomes
Data Source
AI summary
Methods for the production of synthetic spider silk-like proteins in corn endosperm, plant leaf or plant shoot tissue are provided. The present invention provides further methods for the identification of synthetic spider silk-like proteins in corn endosperm, plant leaf or plant shoot tissue.