Plant-Cell Recombinant Casein Micelle Assembly by In Vivo Phosphorylation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing casein micelles are inefficient, environmentally harmful, and costly, with chemical phosphorylation disrupting the native protein structure and enzymatic phosphorylation being too expensive for industrial-scale production.
Innovation Solution
A method of in vivo assembly of recombinant micelles in plant cells using plasmids to encode casein proteins, including κ-casein and αS1-, αS2-, and β-casein, with optional signal peptides for targeting and markers for selection, followed by phosphorylation using kinases to enhance micelle formation and protein expression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chemical phosphorylation is used to phosphorylate food proteins, then phosphorylation can be achieved, but the native structure of food proteins is disrupted and unwanted chemical reagents remain in the final product
Solution Approach 1:
The patent uses food-grade enzymes as intermediary catalysts to facilitate phosphorylation reactions. These enzymes specifically catalyze the transfer of phosphate groups to target proteins without disrupting the native protein structure, unlike chemical reagents. The enzymatic action is selective and controllable, maintaining protein integrity while achieving the desired phosphorylation modification.
Solution Approach 2:
The patent employs food-grade enzymes that can be easily removed from the final product through standard food processing techniques. These enzymes are considered 'short-living' in the context that they are consumed or removed after performing their catalytic function, leaving no unwanted chemical reagents in the final food product. This resolves the issue of chemical reagent contamination while maintaining phosphorylation efficiency.
2Reliability
If enzymatic phosphorylation with ATP is used to phosphorylate food proteins, then food safety is improved, but the cost becomes too high for industrial-scale production
Solution Approach 1:
The patent optimizes multiple parameters to reduce production costs: using alternative phosphate donors besides ATP (such as phosphoenolpyruvate or inorganic phosphate), optimizing enzyme dosage and activity, controlling reaction conditions (pH, temperature, time), and selecting cost-effective food-grade enzymes. These parameter changes maintain food safety through enzymatic phosphorylation while making the process economically viable for industrial-scale production.
3Productivity
If large-scale dairy farming is used for casein micelle production, then industrial-scale production is achieved, but environmental harm increases and animal welfare deteriorates
Solution Approach 1:
The patent produces casein micelles in plant-based fermentation systems that replicate the natural casein micelle structure and composition without requiring livestock. Through controlled fermentation of plant proteins with specific enzymes and under optimized conditions, the system creates authentic casein micelle structures that are identical in function and composition to those from dairy sources, thereby achieving industrial-scale production without the environmental and ethical drawbacks of large-scale dairy farming.
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
Facilitates cost-effective, environmentally friendly production of biologically active casein proteins with improved micelle stability, solubility, and calcium binding, leading to higher-quality food products.
Implementation Method 1
the segment of DNA is transcribed and translated
Implementation Method 2
the segment of DNA is transcribed and translated
Implementation Method 3
assembling in vivo a recombinant micelle within the plant cell
Data Source
AI summary
A plant cell co-expressing at least one casein protein and at least one kinase. The at least one casein protein is phosphorylated by the at least one kinase in vivo. Casein micelles comprising phosphorylated κ-casein and at least one of αS1-casein, αS2-casein, and β-casein can be made in vivo and/or in vitro. The casein micelles can be used to make food products including milk and cheese.