Amy797E Enzyme Extraction from Corn Tissue Using Solubility-Promoting Compounds
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Solution Overview
Problem
Current methods for extracting and detecting enzymes, particularly Amy797E α-amylase from transgenic corn, face challenges due to its pre-binding to insoluble starch substrates, which reduces availability and limits detection sensitivity, especially in wet-milling processes where equipment-intensive steps like steeping and grinding are necessary, and in mixing with non-transgenic corn to achieve optimal enzyme levels.
Innovation Solution
A method involving homogenization of plant tissue in the presence of a non-immunoreactive solubility-promoting compound, such as a substrate-degrading enzyme, to solubilize Amy797E α-amylase, followed by centrifugation to separate soluble and insoluble fractions, allowing for sensitive detection using immunoassays like ELISA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Amy797E α-amylase is extracted from transgenic corn tissue, then the enzyme can be used for starch processing, but the enzyme pre-binds to insoluble starch substrates which reduces detection sensitivity and availability
Solution Approach 1:
The patent applies preliminary action by adding solubility-promoting compounds to the extraction buffer before enzyme extraction. This pre-treatment prevents the enzyme from remaining bound to insoluble starch substrates during extraction, thereby increasing both detection sensitivity and available enzyme concentration in the extracted preparation.
Solution Approach 2:
The patent uses solubility-promoting compounds as intermediaries to facilitate enzyme extraction. These compounds act as mediators between the enzyme-starch complex and the extraction buffer, enabling the enzyme to be released from insoluble substrates and solubilized in the extraction buffer for improved detection and availability.
2Quantity of substance
If wet-milling process is used for starch recovery, then co-products are more valuable, but equipment-intensive steps like steeping and grinding are required which increase processing time and cost
Solution Approach 1:
The patent extracts the enzyme activity from transgenic corn tissue and incorporates it into non-transgenic corn or starch processing. This extraction approach allows the valuable enzyme function to be separated from the complex wet-milling process, enabling simplified processing while maintaining co-product value through enhanced starch conversion capability.
Solution Approach 2:
The patent makes the extracted enzyme preparation universally applicable to multiple processing scenarios. The enzyme can be used in various starch processing applications including ethanol production, starch modification, and feed formulation, replacing the need for specialized wet-milling equipment in many cases.
3Productivity
If transgenic corn event 3272 is mixed with non-transgenic corn to achieve optimal enzyme levels, then processing efficiency improves, but detection of transgenic material becomes more difficult
Solution Approach 1:
The patent applies preliminary action by extracting and concentrating the enzyme from transgenic tissue before mixing with non-transgenic material. This pre-extraction ensures that sufficient enzyme activity is obtained from minimal transgenic content, enabling efficient processing while making transgenic detection feasible through targeted assays of the extracted enzyme preparation.
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 approach significantly increases the sensitivity of Amy797E detection, enabling the identification of less than one transgenic corn kernel per 1000 and reduces the need for equipment-intensive processing steps, improving the efficiency and value of corn processing co-products.
Implementation Method 1
incubated to allow for solubilization of the polypeptide of interest
Implementation Method 2
the sample is centrifuged to separate the soluble and insoluble fractions
Implementation Method 3
a non-immunoreactive solubility-promoting compound, such as a substrate-degrading enzyme
Data Source
AI summary
This invention provides a method for the extraction and detection of a peptide from transgenic plant tissues wherein a non-immunogenic solubility-promoting compound is used to release the enzyme into the solution fraction during the purification process. In some embodiments, this invention provides a method for the extraction and detection of the enzyme Amy797E, which is a heterologous thermo-tolerant α-amylase, from the tissues of corn event 3272 using a non-immunogenic amylase during the purification process. This invention allows for a limit of detection of 1:1000 of Amy797E in an enzyme-linked immunosorbent assay (ELISA).