Alkaline Extraction Buffer for Membrane Proteins in Processed Plant Matrices
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Solution Overview
Problem
The extraction of membrane-bound proteins from highly processed plant materials, such as canola meal, is challenging due to the denaturing effects of high temperature and harsh chemical processing, which render standard extraction buffers insufficient for effective protein extraction.
Innovation Solution
A novel extraction method involving incubation of the sample at a temperature of 35° C. to 55° C. in a buffering reagent with a pH of 10 to 12.5, containing a detergent at 0.5% to 3%, and a reducing agent, which allows for the efficient extraction of membrane-bound proteins from highly processed plant seed matrices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard extraction buffers are used, then the extraction process is simple, but membrane-bound proteins cannot be effectively extracted from highly processed plant materials
Solution Approach 1:
The patent applies parameter changes by modifying the pH to highly alkaline conditions (pH 11.5-12.5) and adjusting detergent concentrations (0.5-3%) to extract membrane-bound proteins from highly processed plant materials. This resolves the contradiction by transforming the extraction buffer parameters to achieve high protein extractability while maintaining a relatively simple single-step process.
Solution Approach 2:
The invention uses a composite extraction buffer system combining highly alkaline buffering reagents (sodium carbonate, sodium bicarbonate, tris(hydroxymethyl)aminomethane) with specific detergents (sodium deoxycholate, sodium dodecyl sulfate, polyoxyethylene (10) dodecyl ether). This composite formulation achieves effective membrane protein extraction while keeping the procedure simple and direct.
2Productivity
If high temperature and harsh chemical conditions are applied, then membrane-bound proteins can be extracted, but protein denaturation occurs
Solution Approach 1:
The patent utilizes parameter changes by implementing highly alkaline pH conditions (11.5-12.5) combined with moderate temperature incubation (35-55°C) to extract membrane proteins without extreme denaturation. The alkaline environment facilitates membrane disruption and protein solubilization while the controlled temperature prevents complete protein degradation, achieving extraction efficiency while preserving sufficient protein integrity for downstream analysis.
3Productivity
If alkaline extraction is performed, then protein extractability increases, but additional processing steps are required for immunoassay analysis
Solution Approach 1:
The patent applies preliminary action by incorporating all necessary extraction components (highly alkaline buffering reagents, detergents, and reducing agents) into a single pre-formulated extraction buffer. This allows membrane-bound proteins to be directly extracted in a single step with immediate suitability for immunoassay analysis, eliminating the need for separate resuspension or solubilization steps that would otherwise be required.
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
This method achieves high protein extractability percentages, up to 100%, enabling successful quantification of extracted proteins from canola meal and other highly processed plant materials, and allows for immediate analysis without prior resuspension or solubilization.
Implementation Method 1
incubating the sample at an incubation temperature of 35° C. to 55° C. in a buffering reagent of pH 10 to 12.5, comprising a detergent at 0.5% to 3%
Implementation Method 2
standard extraction buffer is insufficient to extract membrane proteins, in particular from highly processed (high temperature and high pH) plant meals
Implementation Method 3
incubating the sample at an incubation temperature of 35° C. to 55° C.
Data Source
AI summary
The present invention provides the method and means for an efficient isolation of membrane-bound proteins from biological samples, e.g. in samples from raw or processed plant material. The biological sample can be highly processed, e.g. by applying high temperature, pressure, or a chemical treatment and can be derived from seed matrices as well as other typical plant tissues for example seed, grain, leaf, root, or pollen. The invention comprises the provision of a novel extraction buffer (MEB) and its application in the method of the invention.