Affinity Chromatography Matrices with Segmented Ligand Coupling
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Solution Overview
Problem
Current methods for coupling protein ligands to solid supports in affinity chromatography face limitations such as low binding capacity, high costs, and complexity in genetically engineering selective coupling functionalities, as well as fixed ratios of ligand and associative groups, which restrict flexibility and control over chromatographic conditions.
Innovation Solution
A method involving separate reactions for associating and activating groups with the solid support, allowing for independent control of protein ligand and associative group concentrations, enabling higher loading capacities and optimized chromatographic conditions without the need for recombinant engineering or fixed ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If protein ligands are coupled to solid supports using traditional methods with activated groups, then the ligand binds to the support, but the binding capacity is limited and the process is costly due to genetic engineering requirements
Solution Approach 1:
The patent divides the coupling process into two independent reactions: first coupling the associative group to the solid support, then separately coupling the protein ligand containing the activating group. This segmentation eliminates the need for genetic engineering of selective coupling functionalities while achieving high binding capacity through independent optimization of each component.
Solution Approach 2:
The patent introduces an associative group as an intermediary that mediates between the solid support and the protein ligand. This intermediary enables non-covalent interactions that enhance binding capacity without requiring complex genetic engineering, thereby resolving the contradiction between manufacturing ease and binding capacity.
2Adaptability or versatility
If linker assisted coupling is used to attach protein ligands, then the ligand couples to the support with some pre-association, but the ratio of ligand to associative groups is fixed which restricts flexibility
Solution Approach 1:
The patent segments the coupling system into independent components: the associative group coupled to the solid support and the protein ligand with activating group. This allows independent control of each component's concentration and properties, providing flexibility without the fixed ratios inherent in linker assisted coupling systems.
Solution Approach 2:
The patent creates a dynamic system where the ratios of ligand to associative groups can be adjusted independently based on specific application requirements. This dynamic control flexibility is achieved through separate coupling reactions rather than fixed linker-based systems.
3Quantity of substance
If high protein ligand density is loaded to increase static capacity, then the upper limit of protein capacity increases, but non-specific binding also increases
Solution Approach 1:
The associative group acts as an intermediary that provides non-covalent interaction sites separate from the covalent attachment points. This allows high protein ligand density for increased static capacity while the associative groups can be optimized to minimize non-specific binding, resolving the contradiction between capacity and specificity.
Solution Approach 2:
The patent applies local quality by providing different functional groups at different locations: the activating group for covalent attachment and the associative group for non-covalent interactions. This spatial separation allows independent optimization of binding capacity and specificity.
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 enhances static and dynamic binding capacities of protein ligands, reduces non-specific binding, and allows for tailored chromatographic conditions, improving the efficiency and cost-effectiveness of protein purification processes.
Implementation Method 1
contacting the solid support with an associative group such that the associative group covalently binds to the solid support
Implementation Method 2
activating the solid support using an activating group; contacting the solid support with the protein ligand such that the protein ligand binds to the activated solid support
Implementation Method 3
the protein ligand binds to the activated solid support and non-covalently interacts with the associative group
Data Source
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AI summary
The invention provides methods of coupling protein ligands to a solid support. The invention also provides affinity chromatography matrices and methods of using affinity chromatography matrices to purify a target molecule.