Porous Particles for Isoelectric Protein Separation
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Solution Overview
Problem
Current methods for separating proteins based on their isoelectric points, such as two-dimensional electrophoresis and mass spectrometry, are inefficient for large-scale proteomic and clinical applications due to mechanical limitations and labor-intensive processes, and existing ion exchange materials are not suitable for protein separation.
Innovation Solution
Development of porous particles with predetermined isoelectric points and electroendoosmotic properties, which are used in a chromatographic separation system to separate proteins based on their isoelectric points, allowing for efficient separation and subsequent analysis using mass spectrometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two-dimensional electrophoresis is used to separate proteins, then proteins can be separated by isoelectric point and molecular mass, but the method is not efficient for large-scale proteomic or clinical applications
Solution Approach 1:
The patent replaces the mechanical gel electrophoresis system with an electrochromatographic system using porous particles. Instead of proteins migrating through a gel matrix under electric field, proteins are separated by binding to porous particles with specific isoelectric points in a fluid phase, enabling higher throughput and automation while maintaining separation precision.
Solution Approach 2:
The invention changes the separation parameter from two-dimensional (isoelectric point and molecular mass) to one-dimensional (isoelectric point only) by using porous particles with predetermined isoelectric points. This simplification enables faster separation suitable for large-scale applications while maintaining adequate resolution through precise control of particle isoelectric point distribution.
2Measurement precision
If mass spectrometry is used to determine protein identity, then accurate protein identification is achieved, but the process becomes too laborious to catalog thousands of proteins
Solution Approach 1:
The patent performs preliminary separation of proteins by isoelectric point using porous particles before mass spectrometry analysis. This pre-separation concentrates the complexity management step before identification, allowing multiple proteins to be analyzed in parallel batches rather than individually, significantly reducing the time required to catalog thousands of proteins while maintaining accurate identification.
Solution Approach 2:
The invention segments the proteome into fractions based on isoelectric point ranges using porous particles with different isoelectric points. Each fraction contains a manageable subset of proteins that can be analyzed by mass spectrometry independently, transforming the overwhelming task of analyzing all proteins simultaneously into multiple manageable analysis steps.
3Ease of operation
If existing ion exchange materials are used for protein separation, then separation based on charge is achieved, but the materials are not suitable for protein separation due to mechanical characteristics
Solution Approach 1:
The patent creates composite porous particles combining ion exchange functionality with mechanically robust porous matrix materials. These composite particles integrate the charge-based separation capability of ion exchange materials with the mechanical strength and chemical stability of porous beads, enabling reliable protein separation that existing materials could not achieve alone.
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 system enables robust and efficient separation of proteins from complex mixtures based on isoelectric points, providing detailed analytical information for proteomic and clinical applications, improving the efficiency and practicality of protein analysis.
Implementation Method 1
separating proteins based on their isoelectric points
Implementation Method 2
particles having a predetermined isoelectric point such that the particle maintains a substantially neutral electrostatic charge at a predetermined pH
Implementation Method 3
Mass spectrometry is a much more powerful technique to determine not only mass, but protein identity by correlating a sample's fragmentation pattern with the fragmentation patterns of known proteins
Data Source
AI summary
Materials, apparatuses, methods, and systems for isolating and identifying mixture components on the basis of isoelectric point (“pI”). In one aspect, the materials are particles adapted to have a predetermined isoelectric point. The particles include a porous body into which a plurality of cavities extend. A substance of a predetermined isoelectric point is deposited in the cavities to provide thereby the particle's isoelectric value.