Enzymatic Cofactor Regeneration via Membrane Reactor Segmentation
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Solution Overview
Problem
Current enzymatic one-pot processes for redox cofactor regeneration in industrial applications face challenges with low substrate concentrations, inefficient operation, and the need for divergent reaction conditions, limiting their scalability and effectiveness.
Innovation Solution
A process for enzymatic regeneration of NAD+/NADH and NADP+/NADPH in a one-pot reaction system, where oxygen or specific compounds are used to regenerate cofactors, allowing for simultaneous oxidation and reduction reactions with higher substrate concentrations, enabling efficient cofactor recycling and product formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional enzyme-linked cofactor regeneration systems are used in one-pot reactions, then cofactor reuse rate is improved, but substrate concentration must be kept low to avoid byproduct formation
Solution Approach 1:
The patent introduces a membrane reactor as an intermediary system that physically separates the biocatalyst from the reaction medium while allowing selective transport of substrates and products. This membrane-mediated separation enables high substrate concentrations in the reaction phase without direct contact between substrate and enzyme, preventing unwanted side reactions while maintaining high cofactor turnover rates
Solution Approach 2:
The reaction system is segmented into distinct functional zones: a membrane-containing reactor zone for cofactor regeneration and a separate reaction zone for product formation. This spatial segmentation allows independent optimization of conditions in each zone, enabling high substrate concentration in the reaction zone while maintaining low effective enzyme concentration at the membrane interface
2Productivity
If multiple enzymatic redox reactions are performed simultaneously in one-pot, then process efficiency is improved, but divergent reaction conditions are required for individual transformations
Solution Approach 1:
The patent applies local quality by creating distinct micro-environments within the membrane reactor system. Different membrane compartments or reactor zones can maintain different pH, temperature, or cofactor concentration profiles optimized for specific enzymatic transformations, allowing multiple reactions with divergent condition requirements to proceed simultaneously in the same overall system
Solution Approach 2:
The membrane reactor system serves multiple functions simultaneously: it acts as a physical separator, a selective transport barrier, a cofactor regeneration chamber, and a reaction vessel. This multi-functionality allows the single system to accommodate and optimize multiple different enzymatic reactions with varying condition requirements without requiring separate reaction vessels
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 enables the performance of multiple enzymatic redox reactions in a single batch with higher substrate concentrations, improving efficiency, reducing costs, and enhancing the turnover rate, making the process more economically viable and environmentally friendly.
Implementation Method 1
enzymatic regeneration of the redox cofactors NAD+/NADH and NADP+/NADPH in a one-pot reaction, wherein, as a result of at least two further enzymatically catalyzed redox reactions
Data Source
AI summary
A process for the enzymatic regeneration of the redox cofactors NAD+/NADH and NADP+/NADPH in a one-pot reaction, wherein, as a result of at least two further enzymatically catalyzed redox reactions proceeding in the same reaction batch (product-forming reactions), one of the two redox cofactors accumulates in its reduced form and, respectively, the other one in its oxidized form, characterized in that a) in the regeneration reaction which reconverts the reduced cofactor into its original oxidized form, oxygen or a compound of general formula R1C(O)COOH is reduced, and b) in the regeneration reaction which reconverts the oxidized cofactor into its original reduced form, a compound of general formula R2CH(OH)R3 is oxidized and wherein R1, R2 and R3 in the compounds have different meanings.