Lip1 Gene Mutations for Lipid Stability in Whole Grain Flour
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Solution Overview
Problem
Current methods to extend the shelf life of whole grain flour and rice bran products are limited due to lipid degradation, which leads to rancidity and off-flavors, as existing techniques to inactivate lipases and lipoxygenases are either ineffective or costly.
Innovation Solution
Human-induced non-transgenic mutations in the Lipase 1 (Lip1) genes of wheat and rice plants reduce lipase activity, enhancing hydrolytic and oxidative stability and improving sensory characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (microwave, heat, vacuum, cold storage, chemical treatment) are used to inactivate lipase and lipoxygenase activity, then lipid degradation is reduced, but the process becomes very expensive to employ commercially
Solution Approach 1:
The invention changes the genetic parameter of the plants by introducing mutations in Lip1 genes, thereby altering the enzymatic activity parameters. This genetic modification approach replaces expensive post-harvest treatments with a built-in biological solution that reduces lipase activity at the source, achieving lipid stability without the high costs of conventional physical or chemical treatments
Solution Approach 2:
The invention extracts and targets the specific harmful component (Lip1 gene activity) responsible for lipid degradation. By using mutagenesis to create loss-of-function mutations in the Lip1 gene, the patent removes the problematic enzymatic activity while leaving the rest of the grain intact, avoiding the need for expensive whole-grain treatments
2Reliability
If conventional methods (microwave, heat, vacuum, cold storage, chemical treatment) are used to inactivate lipase and lipoxygenase activity, then lipid degradation is reduced, but the process becomes ineffective or very expensive
Solution Approach 1:
The invention performs preliminary action by creating mutations in the Lip1 gene before the grain is harvested and processed. This pre-modification ensures that reduced lipase activity is inherent in the grain itself, eliminating the need for costly and complex post-harvest interventions and making shelf-life extension practical and scalable
3Quantity of substance
If whole grain flour is produced, then nutritional value is improved, but shelf life is greatly reduced due to lipid degradation
Solution Approach 1:
The invention converts the harmful effect of lipase activity (which causes rapid spoilage of nutritious whole grains) into a benefit by creating mutations that reduce this activity. The same Lip1 gene that normally causes rapid degradation is modified to protect the nutritional value, allowing whole grain flour to maintain both its nutritional benefits and extended shelf life
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 mutations result in increased shelf life, reduced rancidity, and improved flavor of whole grain flour and rice bran products by decreasing lipid degradation, thereby enhancing their stability and quality.
Implementation Method 1
Lipases (EC 3.1.1.3) catalyze the hydrolysis of ester bonds in mono-, di- and tri-acylglycerides (TAG) into non-esterified or free fatty acids (FFA)
Implementation Method 2
Lpx's (EC 1.13.11.12) are a class of non-heme iron-containing dioxygenases that catalyse the positional and specific dioxygenation of polyunsaturated fatty acids that contain 1,4-cis,cis pentadiene structures to produce the corresponding hydroperoxides
Data Source
AI summary
The disclosure relates to a series of independent human-induced non-transgenic mutations found at one or more of the Lip1 genes of a plant; plants having these mutations in one or more of their Lip1 genes; and a method of creating and finding similar and/or additional mutations of Lip1 by screening pooled and/or individual plants. The plants disclosed herein exhibit decreased lipase activity without having the inclusion of foreign nucleic acids in their genomes. Additionally, products produced from the plants disclosed herein exhibit increased hydrolytic and oxidative stability and increased shelf life without having the inclusion of foreign nucleic acids in their genomes.