Disperse Polyamide Drag Tags for Free-Solution Nucleic Acid Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for SNP detection, such as capillary array electrophoresis, are costly and require high-order multiplexing or shorter analysis times to be competitive, while free-solution conjugate electrophoresis (FSCE) offers potential for simpler, faster, and more cost-effective SNP detection but lacks effective tools and approaches for realization.
Innovation Solution
The use of disperse polyamide 'drag tags' for high-resolution separation of nucleic acid reaction products in FSCE, enabling multiplexed single-base extension assays without a polymeric sieving matrix, allowing for rapid electrophoretic separation and genotyping accuracy exceeding 96%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capillary array electrophoresis is used for SNP detection, then separation resolution is achieved, but cost and device complexity increase
Solution Approach 1:
The invention extracts and removes the polymeric sieving matrix from the electrophoresis system, transitioning from gel-based capillary array electrophoresis to free-solution conjugate electrophoresis. This extraction eliminates the need for complex gel preparation and handling while maintaining separation capability through the use of disperse polyamide drag tags attached to nucleic acid molecules.
Solution Approach 2:
The invention changes the physical state of the separation medium from a polymeric gel matrix to a free solution with disperse polyamide drag tags. This parameter change simplifies the system by eliminating gel-related complexity while achieving comparable or superior separation resolution through the drag tag mechanism.
2Measurement precision
If conventional electrophoresis with polymeric sieving matrix is used, then separation is achieved, but analysis time increases and throughput decreases
Solution Approach 1:
By removing the polymeric sieving matrix and its associated preparation steps, the invention enables faster analysis times and higher throughput. The free-solution approach with drag tags eliminates gel casting, polymerization, and handling time, allowing for more rapid SNP detection and increased productivity.
3Ease of manufacture
If free-solution conjugate electrophoresis is used, then cost and simplicity are improved, but effective tools and approaches for high-resolution separation are lacking
Solution Approach 1:
The invention introduces disperse polyamide drag tags as intermediary molecules that attach to nucleic acid molecules. These drag tags serve as mediators that enable high-resolution separation in free-solution electrophoresis by providing size-dependent mobility differences without requiring a polymeric sieving matrix, thus maintaining simplicity while achieving precise separation.
Solution Approach 2:
The invention creates a composite system combining nucleic acid molecules with disperse polyamide drag tags. This composite approach allows the nucleic acid-drag tag conjugates to be separated by size in free solution, achieving high-resolution separation without the complexity of conventional gel electrophoresis.
4Adaptability or versatility
If multiplexed single-base extension assays are performed, then SNP detection capability increases, but separation complexity and cost increase
Solution Approach 1:
The free-solution conjugate electrophoresis system with disperse polyamide drag tags provides a universal platform that can handle multiplexed single-base extension assays. The drag tags enable size-based separation of multiple nucleic acid products simultaneously, allowing high SNP detection capability without proportionally increasing separation complexity or cost.
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
FSCE with drag tags facilitates rapid, high-throughput genetic mutation detection and SNP scoring, decoupling primer length from electrophoretic mobility, and enabling efficient implementation on integrated microfluidic devices, thereby reducing costs and increasing throughput.
Implementation Method 1
free-solution conjugate electrophoresis (FSCE) in place of conventional electrophoresis with a gel or polymer sieving matrix
Implementation Method 2
disperse polyamide 'drag tags' for use in achieving high-resolution separation of nucleic acid reaction products
Data Source
AI summary
The present invention provides compositions and methods for performing free-solution conjugate analysis of nucleic acid molecules. For example, the present invention provides multiplexed single-base extension assays for genotyping. In particular, the present invention provides a series of disperse polyamide “drag tags” for use in achieving high-resolution separation of nucleic acid reaction products.