Uranyl-Immobilized Monolithic Support for Miniaturized Protein Capture
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Solution Overview
Problem
Existing methods for capturing and identifying uranium-selectively binding proteins in biological samples face challenges due to limited sample availability, low protein abundance, and reproducibility issues with miniaturized systems, particularly with microbeads, which are laborious to fill and prone to air bubbles and solute adsorption.
Innovation Solution
A method for preparing a monolithic support with immobilized UO22+ cations in situ within miniaturized analytical channels, using a polymerization solution comprising phosphate groups, crosslinking agents, solvents, and radical initiators, allowing for continuous capture and recovery of uranium-binding proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If microbead suspension system is used for uranium protein capture, then capture capacity is achieved, but minimum volume requirement (50 μL) limits scalability and increases reagent consumption
Solution Approach 1:
The patent changes the physical form of the support from discrete microbeads to a continuous monolithic structure, enabling volume reduction from 50 μL minimum to significantly smaller volumes while maintaining capture efficiency through optimized flow dynamics and surface area utilization
Solution Approach 2:
The monolithic support replicates the functional properties of microbead systems (uranium ion binding capacity, protein capture mechanism) in a miniaturized format, preserving the IMAC separation mode effectiveness while eliminating volume constraints
2Volume of moving object
If miniaturized analytical system with microbeads is used, then system size is reduced, but frit installation is required which causes air bubbles and solute adsorption
Solution Approach 1:
The patent removes the frit component entirely from the miniaturized system by designing a monolithic support that can be directly integrated into the channel structure, eliminating the source of air bubbles and solute adsorption while maintaining system miniaturization
Solution Approach 2:
The monolithic support integrates multiple functions (flow distribution, support structure, binding capacity) into a single composite material structure, replacing the multi-component microbead+frit system and improving reliability
3Quantity of substance
If batch capture mode is used with microbeads, then uranium proteins are captured, but large protein sample volumes (20 μg to 50 μg) are required
Solution Approach 1:
The patent employs continuous flow hydraulic mode instead of batch mode, using fluid dynamics to enhance mass transfer and binding efficiency, allowing capture of uranium proteins from smaller sample volumes through optimized flow rates and contact time
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
The method enables efficient, reproducible, and scalable capture and recovery of uranium-binding proteins in reduced volumes, improving experimental reliability and reducing solvent and waste management, suitable for handling radioactive samples.
Implementation Method 1
polymerising the polymerisation solution obtained in step (b), whereby a monolithic support anchored onto the walls of the channel(s) is obtained
Implementation Method 2
The presence of the aminophosphonate groups proved satisfactory for immobilising, by complexation, the uranyl ions
Data Source
AI summary
A method for preparing, in the internal volume of at least one channel, a monolithic support on which uranyl cations are immobilised. The method comprises: (a) activating the inner surface of the channel(s); (b) introducing, into the internal volume of the channel(s), a polymerisation solution comprising: a monomer comprising a phosphate group, at least one crosslinking agent, several solvents, and a radical polymerisation initiator; (c) polymerising the polymerisation solution; (d) rinsing the monolithic support obtained in step (c); and (e) contacting the monolithic support previously rinsed, with a solution comprising uranyl cations. A method for capturing proteins that selectively bind uranium by means of a monolithic support prepared by the above-mentioned method, as well as to a method for recovering proteins that selectively bind uranium with the capture method.