Aqueous Multi-Phase Partitioning for Biomolecule Structural Characterization
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Solution Overview
Problem
Current protein fractionation techniques fail to effectively preserve protein-protein or protein-ligand interactions and are unable to separate mixtures based on structural changes such as glycosylation patterns or conformational changes, leading to reduced sensitivity and specificity in disease diagnosis due to reliance on fixed physical attributes like molecular size or net charge.
Innovation Solution
The use of aqueous multi-phase partitioning methods to identify and isolate biomolecules based on their structural and functional properties, allowing for the determination of relative measures of interaction between biomolecules and their components, which can indicate physiological conditions or disease states without requiring knowledge of the chemical or biological identity of the markers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional protein fractionation techniques are used, then separation based on fixed physical attributes is achieved, but sensitivity and specificity for detecting structural changes are reduced
Solution Approach 1:
The patent changes the separation parameters from fixed physical attributes (molecular size, net charge) to dynamic structural properties by using multiple aqueous phases with different solvent compositions. This allows the system to detect subtle structural changes in biomolecules through their differential partitioning behavior across phases with varying polarity, pH, and solvent properties.
Solution Approach 2:
The invention adds a new dimension to protein separation by introducing multi-phase aqueous systems that create additional separation axes beyond traditional size-exclusion and charge-based methods. The multi-phase approach creates a three-dimensional separation space based on differential solubility and partitioning coefficients, enabling detection of structural changes that conventional two-dimensional approaches miss.
2Reliability
If separation based on molecular size or net charge is used, then fractionation is achieved, but protein-protein or protein-ligand interactions are not preserved
Solution Approach 1:
The patent applies local quality by creating microenvironments in different aqueous phases that preserve specific interaction types. Each phase is optimized with particular solvent compositions, salts, and pH levels that maintain specific protein-protein or protein-ligand interactions while allowing separation based on partitioning behavior, thus preserving local interaction qualities during fractionation.
3Measurement precision
If absolute expression levels are measured, then quantification is achieved, but impact of genetic variability is increased
Solution Approach 1:
The invention changes the measurement parameter from absolute expression levels to relative partitioning coefficients. By measuring how biomolecules distribute across multiple aqueous phases rather than their absolute concentrations, the method eliminates the confounding effect of genetic variability in expression levels and focuses on structural differences that have diagnostic value.
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 detection of subtle changes in biomolecules that are relevant to disease states, improving diagnostic sensitivity and specificity by focusing on structural differences rather than absolute expression levels, thereby reducing the impact of genetic variability.
Implementation Method 1
The use of aqueous multi-phase partitioning methods to identify and isolate biomolecules based on their structural and functional properties
Data Source
AI summary
The present invention generally provides systems and methods for the detection, identification, or characterization of differences between properties or behavior of corresponding species in two or more mixtures comprised of molecules, including biomolecules and/or molecules able to interact with biomolecules, using techniques such as partitioning. The experimental conditions established as distinguishing between the mixtures of the molecules using the systems and methods of the invention can also be used, in some cases, for further fractionation and/or characterization of the biomolecules and/or other molecules, using techniques such as single-step or multiple-step extraction, and/or by liquid-liquid partition chromatography. The methods could also be used for discovering and identifying markers associated with specific diagnostics, and can be used for screening for such markers once discovered and identified during diagnostics screening.