Covalent Nucleic Acid Capture on Porous Beads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current next-generation sequencing methods for nucleic acid analysis are slow and prone to nonspecific off-target reactions, particularly in hybridization capture reactions which can take up to a week and suffer from significant nonspecific binding.
Innovation Solution
A method involving enzymatic attachment of reactive groups to nucleic acid molecules, followed by covalent tethering to a porous support using click chemistry, allowing for primer extension reactions and subsequent elution of products while leaving the nucleic acids tethered, enabling efficient and specific sample processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hybridization capture reaction is used for nucleic acid capture, then nucleic acid targeting precision is improved, but processing time increases significantly (24 hours to one week)
Solution Approach 1:
The patent replaces the traditional hybridization-based mechanical/chemical binding system with a covalent bonding system using porous beads. Nucleic acids are captured through covalent attachment to porous beads functionalized with reactive groups, eliminating the need for prolonged hybridization reactions and significantly reducing processing time while maintaining targeting precision through sequence-specific probe design.
Solution Approach 2:
The patent changes the fundamental binding mechanism parameter from reversible hybridization to irreversible covalent bonding. By using porous beads with covalently attached reactive groups that form stable bonds with nucleic acids, the system achieves rapid capture without the time-consuming hybridization process, while the covalent nature of the bond ensures stable and specific retention of target nucleic acids.
2Measurement precision
If hybridization capture reaction is used for nucleic acid capture, then nucleic acid targeting precision is improved, but nonspecific off-target reactions increase
Solution Approach 1:
The patent replaces the hybridization-based system with covalent bonding to porous beads. The covalent bonds formed between reactive groups on the bead surface and nucleic acids provide a more specific and stable attachment mechanism, eliminating the nonspecific binding that occurs during hybridization capture. This substitution maintains targeting precision while significantly reducing off-target reactions.
Solution Approach 2:
The patent employs porous beads as the capture medium. The porous structure provides a controlled environment for specific binding, while the covalent functional groups attached to the bead surface ensure highly specific nucleic acid capture. The porous material framework supports the reactive groups and provides structural stability, preventing nonspecific interactions while maintaining high targeting precision.
3Productivity
If covalent tethering to porous support is used, then processing speed is improved, but device complexity increases
Solution Approach 1:
The patent uses porous beads as disposable capture media. The beads are functionalized with reactive groups for covalent attachment, used for a single capture and primer extension cycle, then discarded. This approach simplifies the overall system by eliminating the need for complex reuse mechanisms, while the rapid covalent binding enables high processing speed. The simplicity of the disposable bead system reduces device complexity compared to reusable systems requiring elaborate regeneration protocols.
4Productivity
If porous support is reused for multiple primer extension reactions, then productivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs disposable porous beads for each capture and primer extension cycle, eliminating the need for high-precision manufacturing to ensure reuse performance. The beads are functionalized with reactive groups that provide consistent covalent binding in the first use, and while they could theoretically be reused, the manufacturing precision requirements would be extremely high to maintain performance across multiple cycles. The disposable approach simplifies manufacturing while achieving high productivity through rapid processing.
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 method significantly reduces processing time and minimizes nonspecific reactions, allowing for faster and more precise analysis of nucleic acid samples by enabling reuse of the porous support for multiple primer extension reactions.
Implementation Method 1
covalently reacting the reactive group with surface exposed reactive sites on a porous support, thereby covalently tethering the nucleic acid molecules to the porous support
Implementation Method 2
performing a primer extension reaction using the tethered nucleic acid molecules as a template to produce primer extension products
Data Source
AI summary
Provided herein is a method for sample analysis. In some embodiments, the method may involve: a) enzymatically attaching a reactive group to nucleic acid molecules in a sample; b) covalently reacting the reactive group with surface exposed reactive sites on a porous support, thereby covalently tethering the nucleic acid molecules to the porous support; c) performing a primer extension reaction using the tethered nucleic acid molecules as a template to produce primer extension products; and d) eluting the primer extension products from the porous support, while leaving the tethered nucleic acid molecules tethered to the porous support.